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Solar Installation — Colorado license requirements

Verified 2026-10-047 official sources3 classification relations1 scope assertionIndexation gate: passed

01 The project

The starting point is the work itself — Solar Installation in Colorado. The job determines which trades are involved, and the trades determine which license classifications may be required.

ComponentTrade
Solar energy systemSolar
Electrical interconnectionElectrical

02 Jurisdiction

This project is evaluated for Colorado — the two-layer state with no statewide general contractor license at all (a verified absence, not a gap). The state regulates exactly two trades, plumbing (C.R.S. Art. 155) and electrical (Art. 115), through DORA's Division of Professions and Occupations; general construction licensing is entirely local with six researched regimes, and the permit / inspection authority flips state ↔ local by job-site county. There is no statewide dollar threshold, bond or general-liability figure — each a verified absence — and registration conditions are workers' compensation + unemployment evidence only. Colorado jurisdiction page.

Limitation — local regimes beyond the six researched stay unknown

Permit fees, plan-review timelines, exemption lists and every locality beyond Denver, Aurora, Colorado Springs/PPRBD, Fort Collins, Larimer County and Jefferson County remain LOCAL_AUTHORITY_REQUIRED; PPRBD was unreachable all research day, so its license types, fees and exams are NOT_VERIFIED. The official C.R.S. host returns HTTP 403 to this environment, so statutory text was read on FindLaw's mirror retaining the official section anchors — a published limitation on the hub. Without a job-site location the local answer is NOT_DETERMINED, never a guess. State requirements are not the complete story for any locality.

03 Trade → license

Relations below are recorded per state — only this jurisdiction's classifications are shown.

Trades involved: Solar, Electrical.

  • Component basis MASTER-ELECTRICIAN — Master Electrician (ME) confirmed S-CO-12-115-107 rule CO-ELECTRICAL-LICENSE
    The interconnection limb, verbatim: on installations of at least 300 kW, ALL photovoltaic electrical work — 'the interconnection of the modules, grounding of the modules, any balance of system wiring, and the customer-side point of connection to the utility grid' — 'must be performed by a licensed master electrician, licensed journeyman electrician, licensed residential wireman, or properly supervised electrical apprentices' (§12-115-107(2)(f)). Smaller systems follow the same licensing regime via board rules/permits — no separate statutory hour threshold is published (research §O).
  • May require ELECTRICAL-CONTRACTOR — Electrical Contractor (business registration) confirmed S-CO-ELEC-APPS rule CO-ELECTRICAL-CONTRACTOR
    The default answer: a hired rooftop PV install is electrical work → licensed electricians (RW/JW/ME) working for a registered Electrical Contractor, plus a state Electrical (Photovoltaic) permit obtained before installing (homeowner, electrical contractor OR photovoltaic installer may obtain it; plan review via SolarApp+ or Symbium). There is NO generic 'solar contractor license' in Colorado — verified absence (research §O).
  • Alternative path PHOTOVOLTAIC-INSTALLER — Photovoltaic Installer (business registration — SB25-165, new) confirmed S-CO-ELEC-APPS rule CO-PV-INSTALLER-REG
    The NEW alternative business credential: SB25-165 PV installer registration with the State Electrical Board 'no later than December 31, 2026' — ≥1 NABCEP Certified employee, designated agent(s), Colorado Secretary of State good standing, qualifying by PV work on or before 2025-09-01. A registration, not a license; applications open late 2026 (time-gated facts → NOT_DETERMINED) (research §O).

04 Scope

What the official sources say about the work involved — typed assertions, never a boolean "covers". Interpretations are marked as such.

  • Officially included MASTER-ELECTRICIAN Planning Laying Out Installing And Repairing Wiring For Light Heat And Power Per Current Nec (may_perform) C.R.S. §12-115-107(2)(a)(I) S-CO-12-115-107
    The electrical trade field as the board defines it — new work, additions, alterations AND repairs, all against the current NEC. Attached to ME as the highest license; the same standards sentence governs all three licenses (research §E).

05 Requirements

RequirementKindStatementSource
Electrical contractor registration required — a master electrician as responsible individual, one company only, WC + UC evidence
DPO Electrical Applications verbatim (read 2026-10-04)
registrationDPO Electrical Applications verbatim: 'To perform Electrical Contracting in the State of Colorado, you must be a licensed Electrical Contractor registered with the State of Colorado… Hold or employ a licensed master electrician to serve as the responsible individual for the company. The Master Electrician and Company Owner (if separate individuals) must sign an Acknowledgment of Responsibility Form. The selected Master Electrician may be the responsible party for one company only. Must submit evidence of compliance with Workers' Compensation and Unemployment Compensation laws. For local requirements, contact the city and/or county government in the area in which you work.'S-CO-ELEC-APPS
Source S-CO-ELEC-APPS — Colorado State Electrical Board

DPO Electrical — Applications (contractor registration, reciprocity, SB25-165) — DPO Electrical Applications verbatim (read 2026-10-04)

https://dpo.colorado.gov/Electrical/Applications

Retrieved 2026-10-04 · last verified 2026-10-04

Read 2026-10-04 (canonical URL confirmed in page HTML). Electrical Contractor registration verbatim: 'To perform Electrical Contracting in the State of Colorado, you must be a licensed Electrical Contractor registered with the State of Colorado… Hold or employ a licensed master electrician to serve as the responsible individual for the company. The Master Electrician and Company Owner (if separate individuals) must sign an Acknowledgment of Responsibility Form. The selected Master Electrician may be the responsible party for one company only. Must submit evidence of compliance with Workers' Compensation and Unemployment Compensation laws. For local requirements, contact the city and/or county government in the area in which you work.' Experience paths (RW 4,000 h residential-only ≥2 years OR ≥2 years accredited training; JW 8,000 h ≥4 years incl. 2,000 commercial/industrial ≥2 years + 288 hours classroom 'for ALL applicants'; ME three paths). Reciprocity (NERA, journeyman-only): 'a state-administered examination with a passing score from the licensing state', license held ≥1 year, current/active/good standing, no grandfathered licenses — listed states AK, AR, ID, IA, MN, MT, NE, NH, NM, ND, OK, SD, UT, WY. SB25-165 verbatim: 'Senate Bill 25-165 requires Photovoltaic Installers to register with the State Electrical Board no later than December 31, 2026' — ≥1 NABCEP Certified employee, designated agent(s), good standing with the State and registered with the Colorado Secretary of State, qualifying by 'performing PV work on or before September 1, 2025'; applications open late 2026. Foreign-trained path: one year in-country experience, ≤3 years (JW) / ≤4 years (ME) out-of-country credit, transcripts evaluated by an accredited electrical engineering department (research §C/§D/§K/§O).

State electrician license required to perform electrical trade work — residential wireman scope limit
C.R.S. §12-115-109(1)–(2) verbatim (FindLaw mirror, read 2026-10-04)
licenseC.R.S. §12-115-109(1) verbatim: 'No person shall engage in or work at the business, trade, or calling of a journeyman electrician, master electrician, or residential wireman in this state until the person has received a license from the division…'. §12-115-109(2) verbatim: a residential wireman 'shall not perform electrical work of a type that is beyond the authorization of the license held.' The board's minimum standards are the current NEC (§12-115-107(2)(a)) and localities may adopt MORE stringent standards but not weaker ones.S-CO-12-115-109
Source S-CO-12-115-109 — Colorado General Assembly (C.R.S. official host) — read via FindLaw mirror

C.R.S. §12-115-109 — Electrician licenses (journeyman, master, residential wireman) — C.R.S. §12-115-109(1)–(2) verbatim (FindLaw mirror, read 2026-10-04)

https://codes.findlaw.com/co/title-12-professions-and-occupations/co-rev-st-sect-12-115-109/

Retrieved 2026-10-04 · last verified 2026-10-04

Read 2026-10-04 (FindLaw mirror). (1) verbatim: 'No person shall engage in or work at the business, trade, or calling of a journeyman electrician, master electrician, or residential wireman in this state until the person has received a license from the division…'. (2) verbatim residential-wireman scope limit: a residential wireman 'shall not perform electrical work of a type that is beyond the authorization of the license held.' Contains NO dollar threshold (verified absence — research §B/§F).

Photovoltaic Installer registration — SB25-165, register with the State Electrical Board no later than December 31, 2026
DPO Electrical Applications verbatim (read 2026-10-04) + 3 CCR 710-1 Rule 1.13(A)
registrationDPO verbatim: 'Senate Bill 25-165 requires Photovoltaic Installers to register with the State Electrical Board no later than December 31, 2026.' Requirements (same page): employ at least one NABCEP Certified employee; designate agent(s) — 'the registration is invalidated if the agent leaves'; be in good standing with the State and registered with the Colorado Secretary of State; qualify by 'performing PV work on or before September 1, 2025.' Applications become available late 2026. 3 CCR 710-1 Rule 1.13(A) confirms photovoltaic-installer registrations renew every three years with board licenses.S-CO-ELEC-APPS
Source S-CO-ELEC-APPS — Colorado State Electrical Board

DPO Electrical — Applications (contractor registration, reciprocity, SB25-165) — DPO Electrical Applications verbatim (read 2026-10-04) + 3 CCR 710-1 Rule 1.13(A)

https://dpo.colorado.gov/Electrical/Applications

Retrieved 2026-10-04 · last verified 2026-10-04

Read 2026-10-04 (canonical URL confirmed in page HTML). Electrical Contractor registration verbatim: 'To perform Electrical Contracting in the State of Colorado, you must be a licensed Electrical Contractor registered with the State of Colorado… Hold or employ a licensed master electrician to serve as the responsible individual for the company. The Master Electrician and Company Owner (if separate individuals) must sign an Acknowledgment of Responsibility Form. The selected Master Electrician may be the responsible party for one company only. Must submit evidence of compliance with Workers' Compensation and Unemployment Compensation laws. For local requirements, contact the city and/or county government in the area in which you work.' Experience paths (RW 4,000 h residential-only ≥2 years OR ≥2 years accredited training; JW 8,000 h ≥4 years incl. 2,000 commercial/industrial ≥2 years + 288 hours classroom 'for ALL applicants'; ME three paths). Reciprocity (NERA, journeyman-only): 'a state-administered examination with a passing score from the licensing state', license held ≥1 year, current/active/good standing, no grandfathered licenses — listed states AK, AR, ID, IA, MN, MT, NE, NH, NM, ND, OK, SD, UT, WY. SB25-165 verbatim: 'Senate Bill 25-165 requires Photovoltaic Installers to register with the State Electrical Board no later than December 31, 2026' — ≥1 NABCEP Certified employee, designated agent(s), good standing with the State and registered with the Colorado Secretary of State, qualifying by 'performing PV work on or before September 1, 2025'; applications open late 2026. Foreign-trained path: one year in-country experience, ≤3 years (JW) / ≤4 years (ME) out-of-country credit, transcripts evaluated by an accredited electrical engineering department (research §C/§D/§K/§O).

PV ≥300 kW must be performed by licensed master/journeyman/residential wireman or properly supervised apprentices
C.R.S. §12-115-107(2)(f) verbatim (FindLaw mirror, read 2026-10-04)
licenseC.R.S. §12-115-107(2)(f) verbatim: 'On and after January 1, 2020, all photovoltaic electrical work for installations of at least three hundred kilowatts, including the interconnection of the modules, grounding of the modules, any balance of system wiring, and the customer-side point of connection to the utility grid, must be performed by a licensed master electrician, licensed journeyman electrician, licensed residential wireman, or properly supervised electrical apprentices and must comply with all applicable requirements of this article 115…'S-CO-12-115-107
Source S-CO-12-115-107 — Colorado General Assembly (C.R.S. official host) — read via FindLaw mirror

C.R.S. §12-115-107 — Electrical board powers: NEC standards, PV ≥300 kW, EV/solar-ready code — C.R.S. §12-115-107(2)(f) verbatim (FindLaw mirror, read 2026-10-04)

https://codes.findlaw.com/co/title-12-professions-and-occupations/co-rev-st-sect-12-115-107/

Retrieved 2026-10-04 · last verified 2026-10-04

Read 2026-10-04 (FindLaw mirror). (2)(a)(I) verbatim minimum standards: 'the minimum standards governing the planning, laying out, and installing or the making of additions, alterations and repairs in the installation of wiring apparatus and equipment for electric light, heat, and power in this state' per the most current NEC. (2)(a) last sentence verbatim: 'Nothing contained in this section prohibits any city, town, county, city and county … from making and enforcing any such standards that are more stringent than the minimum standards adopted by the board…' (2)(b) board registers apprentices. (2)(f) verbatim: 'On and after January 1, 2020, all photovoltaic electrical work for installations of at least three hundred kilowatts, including the interconnection of the modules, grounding of the modules, any balance of system wiring, and the customer-side point of connection to the utility grid, must be performed by a licensed master electrician, licensed journeyman electrician, licensed residential wireman, or properly supervised electrical apprentices…'. (3)(a) HB23-1233 model electric-ready/solar-ready code (enforcement since March 1, 2024); (3)(b) local provisions yield to it (research §A/§O).

HB23-1233 model electric-ready / solar-ready code applies to electrical permits for new construction and major multifamily renovations
C.R.S. §12-115-107(3) (FindLaw mirror, read 2026-10-04)
permitC.R.S. §12-115-107(3)(a): for electrical permits on new construction or major renovations of multifamily buildings, applicants must comply with the model electric-ready and solar-ready code (EV power-transfer-infrastructure requirements); enforcement since March 1, 2024. §12-115-107(3)(b): local building and zoning provisions yield to these rules.S-CO-12-115-107
Source S-CO-12-115-107 — Colorado General Assembly (C.R.S. official host) — read via FindLaw mirror

C.R.S. §12-115-107 — Electrical board powers: NEC standards, PV ≥300 kW, EV/solar-ready code — C.R.S. §12-115-107(3) (FindLaw mirror, read 2026-10-04)

https://codes.findlaw.com/co/title-12-professions-and-occupations/co-rev-st-sect-12-115-107/

Retrieved 2026-10-04 · last verified 2026-10-04

Read 2026-10-04 (FindLaw mirror). (2)(a)(I) verbatim minimum standards: 'the minimum standards governing the planning, laying out, and installing or the making of additions, alterations and repairs in the installation of wiring apparatus and equipment for electric light, heat, and power in this state' per the most current NEC. (2)(a) last sentence verbatim: 'Nothing contained in this section prohibits any city, town, county, city and county … from making and enforcing any such standards that are more stringent than the minimum standards adopted by the board…' (2)(b) board registers apprentices. (2)(f) verbatim: 'On and after January 1, 2020, all photovoltaic electrical work for installations of at least three hundred kilowatts, including the interconnection of the modules, grounding of the modules, any balance of system wiring, and the customer-side point of connection to the utility grid, must be performed by a licensed master electrician, licensed journeyman electrician, licensed residential wireman, or properly supervised electrical apprentices…'. (3)(a) HB23-1233 model electric-ready/solar-ready code (enforcement since March 1, 2024); (3)(b) local provisions yield to it (research §A/§O).

Valid state permit required BEFORE installing plumbing/electrical work — work started first costs double the permit fee
DPO permits page (permit-before-work) + 3 CCR 720-1 / 3 CCR 710-1 (double fee) + DPO permit information (validity), all read 2026-10-04
permitDPO permits page verbatim: 'A valid Colorado State Electrical permit must be obtained prior to installing electrical wiring' and 'A valid Colorado State Plumbing permit must be obtained prior to installing plumbing.' Both rule sets state: 'Any work commencing prior to the purchase of a permit is subject to twice the prescribed permit fee' (3 CCR 720-1 and 3 CCR 710-1). State permits are valid 12 months with ONE 6-month extension; reinspection fee at the discretion of the inspector; a trim permit fee applies if a permit expires after rough-in. Residential state plumbing permits are priced by fixture count (traps, water hammer arrestors, backflow preventers, water heaters, fuel gas outlets, regulators) and commercial by valuation.S-CO-DPO-PERMITS
Source S-CO-DPO-PERMITS — DORA — Division of Professions and Occupations (DPO)

DPO — Electrical and Plumbing permits (jurisdiction lists, notices, program history) — DPO permits page (permit-before-work) + 3 CCR 720-1 / 3 CCR 710-1 (double fee) + DPO permit information (validity), all read 2026-10-04

https://dpo.colorado.gov/ElectricalPlumbingPermits

Retrieved 2026-10-04 · last verified 2026-10-04

Read 2026-10-04 (tabs read in served HTML). 'A valid Colorado State Electrical permit must be obtained prior to installing electrical wiring' and 'A valid Colorado State Plumbing permit must be obtained prior to installing plumbing.' County jurisdiction lists verbatim (state does NOT inspect where a local program exists — Adams except Federal Heights, Arapahoe except Bow Mar/Deer Trail/Sheridan, Boulder, Broomfield, Chaffee, City of Pueblo and Town of Boone, Delta (city only), Denver, Douglas, Eagle except Minturn/Town of Avon, El Paso, Jefferson, Larimer, Mesa, Pitkin, Pueblo, Routt, San Miguel (Telluride & Mountain Village), Summit, Teller, Weld; plumbing adds Clear Creek, Elbert, Garfield, Gilpin, Grand, Jackson, La Plata, Lake, Moffat, Prowers and differs in the electrical-only exceptions): 'If the county where your job site is located is listed below, do not continue with the permit application process and use the links provided to access the local jurisdiction.' Board history + the 'Notice to Homeowner' ('it is a violation of state law for an individual (other than the homeowner) that is not a registered Electrical or Plumbing Contractor to install an electrical or plumbing project on your property'). State plumbing inspectors cover 27 counties where local programs don't exist (research §A/§B/§C).

06 Rule: CO-ELECTRICAL-LICENSE

C.R.S. §12-115-109(1) verbatim: 'No person shall engage in or work at the business, trade, or calling of a journeyman electrician, master electrician, or residential wireman in this state until the person has received a license from the division…'. §12-115-109(2): a residential wireman 'shall not perform electrical work of a type that is beyond the authorization of the license held.' Work type triggers — NO dollar threshold; homeowner self-performance is a separate outcome. Missing facts yield NOT_DETERMINED.

OutcomeConclusionCaveats
license-requiredstate_trade_license_required
  • No dollar threshold (verified absence, REQ-CO-NO-STATEWIDE-THRESHOLD-001).
  • The business side needs the electrical contractor registration too (rule CO-ELECTRICAL-CONTRACTOR).
  • Residential Wireman scope limit: 'shall not perform electrical work of a type that is beyond the authorization of the license held' (§12-115-109(2)).
  • Localities may enforce MORE stringent electrical standards (§12-115-107(2)(a)) — local rules still apply.
license-already-heldlicense_already_held
  • Holding a license is not holding the RIGHT tier — work beyond the RW authorization needs Journeyman or Master (§12-115-109(2)).
  • Renewal every 3 years (September 30, NEC-aligned) with a 60-day grace + delinquency fee; 24 h CE per cycle (rules CO-RENEWAL-GRACE, CO-CE-ELECTRICAL).
homeowner-self-performhomeowner_self_perform_conditions
  • The FOUR conditions are tested by rule CO-HOMEOWNER-WORK — personally performed, property not for sale/resale/rent and not open to the public, inspections before cover and at completion, NEC compliance.
  • Own residence only; permit from the State Electrical Board or the local building department BEFORE starting.
not-electrical-workoutside_state_electrical_regulation
  • Low-voltage/access-control and fire-alarm scopes follow the board's standards and LOCAL regimes — verify against §12-115-107 before relying on this.
  • General/other trade work answers locally (rules CO-NO-STATEWIDE-GC, CO-LOCAL-LICENSE).

Rule confidence: confirmed. Missing inputs produce NOT_DETERMINED — never a forced answer. Sources: S-CO-12-115-109

07 Rule: CO-ELECTRICAL-CONTRACTOR

DPO Electrical Applications verbatim: to perform electrical contracting in Colorado you must be a registered Electrical Contractor — hold or employ a LICENSED MASTER electrician as the responsible individual, sign the Acknowledgment of Responsibility Form, 'The selected Master Electrician may be the responsible party for one company only', and evidence workers' compensation + unemployment compensation compliance. NO bond, NO general-liability figure (verified absence). Missing facts yield NOT_DETERMINED.

OutcomeConclusionCaveats
registration-requiredstate_trade_registration_required
  • A journeyman cannot be the responsible individual — a MASTER is required.
  • DPO's own instruction: 'For local requirements, contact the city and/or county government in the area in which you work' (rule CO-LOCAL-LICENSE).
  • Homeowners working their own property are outside this rule (rule CO-HOMEOWNER-WORK).
registeredregistration_held
  • The master may be responsible party for ONE company only (rule CO-MASTER-ONE-FIRM) — losing the master breaks the registration.
  • Renewal every 3 years with the board licenses (3 CCR 710-1 Rule 1.13(A)); 60-day grace with delinquency fee.
  • Local license/permit still separate (rule CO-LOCAL-LICENSE).
not-an-electrical-businessoutside_registration_scope
  • Employee work flows under the registered employer's credential (REQ-CO-EMPLOYEE-SUB-001).
  • Individuals doing electrical work still need their own license (rule CO-ELECTRICAL-LICENSE).

Rule confidence: confirmed. Missing inputs produce NOT_DETERMINED — never a forced answer. Sources: S-CO-ELEC-APPS

08 Rule: CO-PV-INSTALLER-REG

SB25-165 via DPO Electrical Applications verbatim: 'Senate Bill 25-165 requires Photovoltaic Installers to register with the State Electrical Board no later than December 31, 2026.' Conditions: ≥1 NABCEP Certified employee; designated agent(s) (invalidated if the agent leaves); good standing with the State and registered with the Colorado Secretary of State; qualifying by 'performing PV work on or before September 1, 2025.' Applications open late 2026 (time-gated facts → NOT_DETERMINED). Renewal every 3 years (Rule 1.13(A)). Missing facts yield NOT_DETERMINED.

OutcomeConclusionCaveats
registration-requiredpv_installer_registration_required
  • A REGISTRATION, not a license — and NOT a generic 'solar contractor license' (verified absence, research §O).
  • The registration does not replace the electrical contractor registration for electrical contracting, nor the individual licenses of the workers doing the work.
  • Whether this business QUALIFIES (pre-2025-09-01 PV work) is a separate fact — without it the eligibility is NOT_DETERMINED.
  • State electrical (photovoltaic) permit required before installing; homeowner, electrical contractor or photovoltaic installer may obtain it.
registration-heldpv_registration_held
  • The standing conditions can break the registration: agent departure invalidates it; the NABCEP employee requirement is continuous.
  • Renews every 3 years with the board licenses (3 CCR 710-1 Rule 1.13(A)); 60-day grace + delinquency fee applies.
  • For electrical work itself, licensed electricians are still required — ≥300 kW PV work must be performed by licensed ME/JW/RW or properly supervised apprentices (§12-115-107(2)(f)).
no-pv-workrule_not_engaged
  • Other solar-adjacent work (roofing, electrical balance-of-system) still answers under local licensing + electrical rules (rules CO-NO-STATEWIDE-GC, CO-ELECTRICAL-LICENSE).

Rule confidence: confirmed. Missing inputs produce NOT_DETERMINED — never a forced answer. Sources: S-CO-ELEC-APPSS-CO-CCR-710-1

09 Rule: CO-PERMIT-BEFORE-WORK

DPO verbatim: 'A valid Colorado State Electrical permit must be obtained prior to installing electrical wiring' and 'A valid Colorado State Plumbing permit must be obtained prior to installing plumbing.' Both board rule sets: 'Any work commencing prior to the purchase of a permit is subject to twice the prescribed permit fee.' The permit applicant must be a 'qualified applicant' (§12-155-120(11)). State permits are valid 12 months with ONE 6-month extension. Missing facts yield NOT_DETERMINED.

OutcomeConclusionCaveats
permit-missingpermit_required_before_work
  • Obtain the permit BEFORE installing — the double-fee rule is automatic, not discretionary.
  • WHOSE permit: state board permit or local building permit depends on the job-site county (rule CO-INSPECTION-AUTHORITY) — 'You are responsible for determining the correct inspection authority' (DPO).
  • Permit fee AMOUNTS are NOT_VERIFIED (online system publishes no schedule) — never estimated.
permit-obtainedpermit_in_hand
  • A permit is per JOB; the credential is per WHO — both are required.
  • Inspections before covering and at completion still apply; reinspection fee at the inspector's discretion; trim permit fee if the permit expires after rough-in.
no-state-trade-workrule_not_engaged
  • Local building/mechanical permits still apply wherever the work sits (local authority — rule CO-LOCAL-LICENSE).

Rule confidence: confirmed. Missing inputs produce NOT_DETERMINED — never a forced answer. Sources: S-CO-DPO-PERMITSS-CO-CCR-720-1S-CO-CCR-710-1

10 Rule: CO-INSPECTION-AUTHORITY

DPO verbatim: 'The State does not inspect in local jurisdictions having its own Electrical Inspection Program. You are responsible for determining the correct inspection authority.' The caller states whether the job-site county runs its own local program (from the DPO county lists). Without that LOCATION fact the answer is NOT_DETERMINED — never guessed. §12-155-120(1)(a) exempts local-program jurisdictions from state plumbing inspection; §12-115-107(2)(a) lets localities enforce more stringent electrical standards.

OutcomeConclusionCaveats
local-authoritylocal_inspection_authority
  • Local licensing may also apply on top (rule CO-LOCAL-LICENSE).
  • The state's MINIMUM codes still bind — localities may exceed but not undercut them (§12-115-107(2)(a); §12-155-120(1)(a)).
  • The lists change — verify on the DPO permits page for the current job (DPO: the applicant is responsible for determining the authority).
state-authoritystate_inspection_authority
  • Buy the state permit before work (rule CO-PERMIT-BEFORE-WORK) from a qualified applicant (REQ-CO-QUALIFIED-APPLICANT-001).
  • A COUNTY can mix: some counties run local programs for only one trade (e.g. electrical-only exceptions) — confirm per trade.
  • No local contractor license question arises from the inspection authority alone (rule CO-LOCAL-LICENSE is separate).

Rule confidence: confirmed. Missing inputs produce NOT_DETERMINED — never a forced answer. Sources: S-CO-DPO-PERMIT-INFOS-CO-DPO-PERMITS

11 No solar license — electrical credential, new registration, one permit gate

Colorado has NO generic "solar contractor license" (verified absence). A hired rooftop PV install is electrical work with two business paths and one statutory performance rule:

QuestionColorado answerSource
Default credential pathlicensed electricians (RW/JW/ME) working for a registered Electrical Contractor — master as responsible individual, one company only (rule CO-ELECTRICAL-CONTRACTOR)S-CO-ELEC-APPS
Alternative business credentialthe NEW photovoltaic installer REGISTRATION (SB25-165): register with the State Electrical Board no later than 2026-12-31, ≥1 NABCEP Certified employee, agent designation, Secretary of State good standing, qualifying by PV work on or before 2025-09-01 — a registration, not a license (rule CO-PV-INSTALLER-REG)S-CO-ELEC-APPS
Installs ≥300 kW§12-115-107(2)(f) verbatim: all PV electrical work — interconnection, grounding, balance-of-system wiring, customer-side point of connection — "must be performed by a licensed master electrician, licensed journeyman electrician, licensed residential wireman, or properly supervised electrical apprentices"S-CO-12-115-107
Permit before installingan Electrical (Photovoltaic) permit must be obtained BEFORE installing; the homeowner, an electrical contractor OR a photovoltaic installer may obtain it; plan review via the state systemS-CO-DPO-PERMITS
EV / solar-ready codeelectrical permits for new construction and major multifamily renovations must comply with the model electric-ready/solar-ready code (enforced since 2024-03-01); local provisions yieldS-CO-12-115-107
Who inspectsthe job-site county decides — local-program counties own the permit and inspection for their areaS-CO-DPO-PERMIT-INFO

Time-gated facts (application availability, agent departure, registration status) return NOT_DETERMINED until they exist — the rule never pretends the 2026-12-31 registration has already happened. Smaller systems follow the same licensing regime via board rules and permits — no separate statutory hour threshold is published. The EV/solar-ready provision is one of the few places Colorado law preempts local provisions (§12-115-107(3)(b)).

12 Permit and inspection layer

The state decides WHO MAY WORK at the two state trades; the job-site county decides who permits and inspects. DPO verbatim: "The State does not inspect in local jurisdictions having its own Electrical Inspection Program. You are responsible for determining the correct inspection authority." In DPO-listed counties: "If the county where your job site is located is listed below, do not continue with the permit application process…" State plumbing inspectors cover the 27 counties with no local program. S-CO-DPO-PERMIT-INFO

A permit is per JOB, a credential is per WHO: "A valid Colorado State Electrical permit must be obtained prior to installing electrical wiring" / "A valid Colorado State Plumbing permit must be obtained prior to installing plumbing", and work started first costs twice the prescribed permit fee (3 CCR 720-1 / 710-1). Local building permits (roofing, mechanical, general) follow each jurisdiction's own schedule — LOCAL_AUTHORITY_REQUIRED. S-CO-DPO-PERMITS

Verify the credential that actually applies on the official lookup before relying on any outcome here: DORA License Lookup (covers every DPO credential) — Denver publishes its own Contractor License Search for local classes. S-CO-DPO-HOME

Source S-CO-ELEC-APPS — Colorado State Electrical Board

DPO Electrical — Applications (contractor registration, reciprocity, SB25-165) — DPO Electrical Applications verbatim (read 2026-10-04)

https://dpo.colorado.gov/Electrical/Applications

Retrieved 2026-10-04 · last verified 2026-10-04

Read 2026-10-04 (canonical URL confirmed in page HTML). Electrical Contractor registration verbatim: 'To perform Electrical Contracting in the State of Colorado, you must be a licensed Electrical Contractor registered with the State of Colorado… Hold or employ a licensed master electrician to serve as the responsible individual for the company. The Master Electrician and Company Owner (if separate individuals) must sign an Acknowledgment of Responsibility Form. The selected Master Electrician may be the responsible party for one company only. Must submit evidence of compliance with Workers' Compensation and Unemployment Compensation laws. For local requirements, contact the city and/or county government in the area in which you work.' Experience paths (RW 4,000 h residential-only ≥2 years OR ≥2 years accredited training; JW 8,000 h ≥4 years incl. 2,000 commercial/industrial ≥2 years + 288 hours classroom 'for ALL applicants'; ME three paths). Reciprocity (NERA, journeyman-only): 'a state-administered examination with a passing score from the licensing state', license held ≥1 year, current/active/good standing, no grandfathered licenses — listed states AK, AR, ID, IA, MN, MT, NE, NH, NM, ND, OK, SD, UT, WY. SB25-165 verbatim: 'Senate Bill 25-165 requires Photovoltaic Installers to register with the State Electrical Board no later than December 31, 2026' — ≥1 NABCEP Certified employee, designated agent(s), good standing with the State and registered with the Colorado Secretary of State, qualifying by 'performing PV work on or before September 1, 2025'; applications open late 2026. Foreign-trained path: one year in-country experience, ≤3 years (JW) / ≤4 years (ME) out-of-country credit, transcripts evaluated by an accredited electrical engineering department (research §C/§D/§K/§O).

Evidence

S-CO-12-115-107statute
Colorado General Assembly (C.R.S. official host) — read via FindLaw mirror
C.R.S. §12-115-107 — Electrical board powers: NEC standards, PV ≥300 kW, EV/solar-ready code
https://codes.findlaw.com/co/title-12-professions-and-occupations/co-rev-st-sect-12-115-107/
verified 2026-10-04retrieved 2026-10-04
S-CO-12-115-109statute
Colorado General Assembly (C.R.S. official host) — read via FindLaw mirror
C.R.S. §12-115-109 — Electrician licenses (journeyman, master, residential wireman)
https://codes.findlaw.com/co/title-12-professions-and-occupations/co-rev-st-sect-12-115-109/
verified 2026-10-04retrieved 2026-10-04
S-CO-CCR-710-1regulation
Colorado Secretary of State — code of regulations host
3 CCR 710-1 — State Electrical Board Rules and Regulations
https://www.sos.state.co.us/CCR/GenerateRulePdf.do?ruleVersionId=12606
verified 2026-10-04retrieved 2026-10-04
S-CO-CCR-720-1regulation
Colorado Secretary of State — code of regulations host
3 CCR 720-1 — Rules and Regulations of the Colorado State Plumbing Board
https://www.sos.state.co.us/CCR/GenerateRulePdf.do?ruleVersionId=8778
verified 2026-10-04retrieved 2026-10-04
S-CO-DPO-PERMIT-INFOboard page
DORA — Division of Professions and Occupations (DPO)
DPO — Permit information (homeowner conditions, inspection authority, permit validity)
https://dpo.colorado.gov/ElectricalPlumbingPermits/Info
verified 2026-10-04retrieved 2026-10-04
S-CO-DPO-PERMITSboard page
DORA — Division of Professions and Occupations (DPO)
DPO — Electrical and Plumbing permits (jurisdiction lists, notices, program history)
https://dpo.colorado.gov/ElectricalPlumbingPermits
verified 2026-10-04retrieved 2026-10-04
S-CO-ELEC-APPSboard page
Colorado State Electrical Board
DPO Electrical — Applications (contractor registration, reciprocity, SB25-165)
https://dpo.colorado.gov/Electrical/Applications
verified 2026-10-04retrieved 2026-10-04

Verification

Page last verified
2026-10-04
newest verification date across the sources this page depends on
Policy reviewed
2026-10-04
policy: index — Strong evidence (unlike Nevada): SB25-165 PV installer registration by 2026-12-31 verbatim (NABCEP employee, Secretary of State good standing, 2025-09-01 qualifying cutoff), §12-115-107(2)(f) 300 kW licensed-electrician rule verbatim, state Electrical (Photovoltaic) permit + SolarApp+/Symbium, Fort Collins NABCEP solar license, EV/solar-ready code (HB23-1233) — plus an explicit 'no generic solar contractor license' statement.
Rules applied
5
CO-PV-INSTALLER-REG, CO-PERMIT-BEFORE-WORK, CO-ELECTRICAL-LICENSE, CO-ELECTRICAL-CONTRACTOR, CO-INSPECTION-AUTHORITY