Nevada Contractor License Classifications

Nevada classifies the LICENSE itself: 14 rows are seeded here — Class B (General Building) with its three residential/commercial subclasses, and eleven primary Class C specialty classifications — each carrying the verbatim official NAC scope text, the statutory citation and its source. The board publishes the full surface as Class A (General Engineering A-1…A-25), Class B (B-1…B-7), Class AB and 36 primary Class C classifications; subclasses never stand alone as licenses (FAQ #10: they combine under one primary license).

Verified 2026-10-0414 classifications1 credential shapesIndexation gate: passed

01 One license, one business, no price gate

BUSINESS LICENSE (NSCB)+CLASSIFICATION + SUBCLASSES≠LOCAL LAYER (NRS 624.035)

No price gate anywhere — no classification decision on this page depends on contract price: NRS 624.700 requires the license at ANY price (verified absence of a statewide threshold). S-NV-624-700
One license per PRIMARY classification — NSCB FAQ #10 (verbatim): "A separate license is required for each primary classification. Multiple sub classifications within the same primary classification can be combined under one license." That is why C-1d/C-1f/C-1h appear as scope TEXT inside the C-1 row, never as rows.
The license belongs to the business — qualified by an individual with 4 full years in the classification within the preceding 15 years (NRS 624.260(6)); one natural person may not qualify more than one active license without the 25%/common-parent/public-benefit exceptions. S-NV-624-260
Cross-cutting scope rules (NRS 624.220(4)) — a specialty contractor may take 2+ craft contracts where the other work is "incidental and supplemental"; a licensed contractor may do out-of-class work under $1,000 with no permit — but NEVER plumbing, electrical, refrigeration or AC. S-NV-624-220

Recorded, not smoothed

The board's classifications page heading says "42 Subcategories" while its own FAQ #9 says "36 separate primary C license classifications" and the NAC enumerates exactly 36 primary C sections — a soft inconsistency inside official pages; the statutory/NAC enumeration governs on this site (research §C). Class A (General Engineering: fixed works requiring specialized engineering knowledge and skill — e.g. A-7 Excavating and Grading, A-10 Pools, A-16 Paving, A-23 Asbestos) and Class AB (qualified in both A and B) exist but are not seeded: no product answer turns on them.

02 Class B — General Building (prime contractor classes)

Code	Credential	Category	Official scope (verbatim)	Citation	Source
B-2	Contractor's License (issued to the business — individuals, partnerships, corporations, limited liability companies or joint ventures; 'The license belongs to the business and not the qualifying party' — NSCB General Requirements; qualified by a qualifying individual with 4 years of classification experience in the preceding 15 years — NRS 624.260(6))	Residential and Small Commercial	The construction and remodeling of houses and other structures which support, shelter or enclose persons or animals or other chattels, and which do not extend more than three stories above the ground and one story below the ground.	NAC 624.170(2)	S-NV-NAC-170
B	Contractor's License (issued to the business — individuals, partnerships, corporations, limited liability companies or joint ventures; 'The license belongs to the business and not the qualifying party' — NSCB General Requirements; qualified by a qualifying individual with 4 years of classification experience in the preceding 15 years — NRS 624.260(6))	General Building contractor	'…construction or remodeling of buildings or structures … requiring in their construction the use of more than two unrelated building trades or crafts, upon which he or she is a prime contractor…' (NRS 624.160/624.170, as quoted in the research record).	NRS 624.160 / 624.170 (class definition); NAC 624.170 (subclass scopes)	S-NV-CLASS-PAGE
B-6	Contractor's License (issued to the business — individuals, partnerships, corporations, limited liability companies or joint ventures; 'The license belongs to the business and not the qualifying party' — NSCB General Requirements; qualified by a qualifying individual with 4 years of classification experience in the preceding 15 years — NRS 624.260(6))	Commercial Remodeling	Interior remodeling of commercial structures, including structures extending more than three stories above the ground — but the subclassification 'does not authorize … the installation, removal or modification … of any structural member, mechanical system, fire protection system, or other life safety system.'	NAC 624.170(6)	S-NV-NAC-170
B-7	Contractor's License (issued to the business — individuals, partnerships, corporations, limited liability companies or joint ventures; 'The license belongs to the business and not the qualifying party' — NSCB General Requirements; qualified by a qualifying individual with 4 years of classification experience in the preceding 15 years — NRS 624.260(6))	Residential Remodeling	The remodeling and improvement of an existing, detached, stand-alone single-family residence or single-family residential unit within a structure that does not extend more than three stories above the ground and one story below the ground. The provisions of this subsection do not authorize a person licensed in subclassification B-7 to increase the existing enclosed space of the residential structure.	NAC 624.170(7)	S-NV-NAC-170

The B-7 boundary — why additions are B-2 work

NAC 624.170(7) verbatim: "The provisions of this subsection do not authorize a person licensed in subclassification B-7 to increase the existing enclosed space of the residential structure." A remodel that stays inside the existing envelope is B-7; the moment enclosed space is added, B-2 answers (rule NV-REMODEL-CLASS). Class B itself only attaches where a prime contractor's job uses "more than two unrelated building trades or crafts" — single-trade work is C-class specialty territory.

03 Class C — Specialty (primary classifications used by this product)

Code	Credential	Category	Official scope (verbatim)	Citation	Source
C-1	Contractor's License (issued to the business — individuals, partnerships, corporations, limited liability companies or joint ventures; 'The license belongs to the business and not the qualifying party' — NSCB General Requirements; qualified by a qualifying individual with 4 years of classification experience in the preceding 15 years — NRS 624.260(6))	Plumbing and heating contracting	A C-1 holder may perform any C-1 subclassification work (NAC 624.190). Verbatim key subclasses: C-1d PLUMBING — sanitary supply/waste/vent systems; roof drainage; hydronic heating ≤ 200,000 BTU; landscape irrigation; 'Systems to heat potable water, including, without limitation, solar equipment'; permanent gas supply for residential/industrial purposes; medical gas piping; 'piping for water and gas beginning at the edge of a building and ending at the utility meter.' C-1f HEATING, COOLING AND CIRCULATING AIR — fabrication/installation of systems for heating, evaporative cooling and circulation of air incl. solar equipment for that purpose, but do 'not authorize … cooling systems which use refrigeration as an integral part of the system.' C-1g PIPES AND VENTS FOR GAS — installation of pipes from the source of supply of LP and natural gas into a building or structure and related vents. C-1h WATER HEATERS — 'The installation, replacement and repair of water heaters, including the connection to existing lines for potable water and gas, the necessary venting and other incidental connections.' C-1e SHEET METAL — gutters, ducts, flues, metal roof systems (not refrigeration equipment).	NAC 624.190 (scope); C-1a…C-1k subclassifications	S-NV-NAC-190
C-2	Contractor's License (issued to the business — individuals, partnerships, corporations, limited liability companies or joint ventures; 'The license belongs to the business and not the qualifying party' — NSCB General Requirements; qualified by a qualifying individual with 4 years of classification experience in the preceding 15 years — NRS 624.260(6))	Electrical contracting	C-2 may install any electrical wires, fixtures, appliances, apparatuses, raceways and conduits, and wind-energy conversion systems (residential and commercial) (NAC 624.200). Verbatim subclasses: C-2a ELECTRICAL WIRING — installation/alteration/repair of wires, fixtures, appliances, apparatuses and related wiring on existing structures. C-2f RESIDENTIAL WIRING — current not exceeding 600 volts on new or existing structures not exceeding three stories above the ground. C-2g PHOTOVOLTAICS — 'installation, alteration and repair of photovoltaic cells, batteries and invertors … but not the installation, alteration or repair of electrical wires beyond the service panel, if such work is for residential and commercial installations and not scaled or intended solely for the commercial production and sale of electricity.' C-2d LOW VOLTAGE — fiber optics or not more than 91 volts.	NAC 624.200 (scope); C-2a…C-2g subclassifications	S-NV-NAC-200
C-3	Contractor's License (issued to the business — individuals, partnerships, corporations, limited liability companies or joint ventures; 'The license belongs to the business and not the qualifying party' — NSCB General Requirements; qualified by a qualifying individual with 4 years of classification experience in the preceding 15 years — NRS 624.260(6))	Carpentry, maintenance and minor repairs	NAC 624.210 subclasses: C-3a CARPENTRY AND REPAIRS — form work, framing, rough carpentry, subflooring, siding, exterior stairs/railings, roof decking, truss members and sheathing, doors/windows/cabinets; C-3b FINISH CARPENTRY; C-3c INSULATION AND WEATHER STRIPPING; C-3d OVERHEAD DOORS; C-3e DRYWALL.	NAC 624.210 (scope); C-3a…C-3e subclassifications	S-NV-NAC-210
C-4	Contractor's License (issued to the business — individuals, partnerships, corporations, limited liability companies or joint ventures; 'The license belongs to the business and not the qualifying party' — NSCB General Requirements; qualified by a qualifying individual with 4 years of classification experience in the preceding 15 years — NRS 624.260(6))	Painting and decorating	NAC 624.220: paints, varnishes and coatings; wallcovering; surface preparation; installing drywall, metal studs and acoustical tile; subclasses C-4a…C-4g (incl. C-4e DRYWALL, C-4c TAPING AND FINISHING).	NAC 624.220 (scope); C-4a…C-4g subclassifications	S-NV-NAC-220
C-5	Contractor's License (issued to the business — individuals, partnerships, corporations, limited liability companies or joint ventures; 'The license belongs to the business and not the qualifying party' — NSCB General Requirements; qualified by a qualifying individual with 4 years of classification experience in the preceding 15 years — NRS 624.260(6))	Concrete contracting	NAC 624.230: surface preparation and reinforcement steel; pour/place/finish/install concrete; forms, molds, slipforms and pans; concrete sealants and waterproofing; saw, cut, drill and core concrete and asphaltic paving.	NAC 624.230	S-NV-NAC-230
C-15	Contractor's License (issued to the business — individuals, partnerships, corporations, limited liability companies or joint ventures; 'The license belongs to the business and not the qualifying party' — NSCB General Requirements; qualified by a qualifying individual with 4 years of classification experience in the preceding 15 years — NRS 624.260(6))	Roofing and siding	NAC 624.320 — C-15a ROOFING: 'The installation, application, alteration and repair of watertight and weatherproof material used on roofs, such as asphalt, pitch, tar, felt, flax, shakes, shingles, aluminum, tile, slate, urethane and photovoltaic roof tiles intended to serve in place of other existing roofing materials, but not the installation of siding or devices …' — the subclassifications 'do not authorize a holder … to install conduits, inverters, batteries or electrical connections.' C-15b SIDING; C-15c INSULATION; C-15d WATERPROOFING.	NAC 624.320 (scope); C-15a…C-15d subclassifications	S-NV-NAC-320
C-20	Contractor's License (issued to the business — individuals, partnerships, corporations, limited liability companies or joint ventures; 'The license belongs to the business and not the qualifying party' — NSCB General Requirements; qualified by a qualifying individual with 4 years of classification experience in the preceding 15 years — NRS 624.260(6))	Tiling	NAC 624.370: install by suction and adhesives ceramic, encaustic, vitreous and other tile-like products (except hollow or structural partitioning tile); C-20a plastic tile and wallboard; C-20b pool tile and coping.	NAC 624.370 (scope); C-20a, C-20b subclasses	S-NV-NAC-370
C-21	Contractor's License (issued to the business — individuals, partnerships, corporations, limited liability companies or joint ventures; 'The license belongs to the business and not the qualifying party' — NSCB General Requirements; qualified by a qualifying individual with 4 years of classification experience in the preceding 15 years — NRS 624.260(6))	Refrigeration and air-conditioning	NAC 624.380: 'Work authorized by a classification C-21 license is not incidental or supplemental to the performance of any other work which may be performed by a specialty contractor.' C-21b AIR-CONDITIONING: 'The installation, repair, service and maintenance of equipment, devices, machinery, units and related ductwork which use evaporation, refrigeration, boilers or combustion for the control of air temperatures in structures, including … humidity and thermostatic controls…' C-21d MAINTENANCE: 'repair and replacement of any parts of existing units or systems … but not the replacement of complete condenser assemblies on remote systems, air handlers or any work that may alter the design of an existing system.' Also C-21a REFRIGERATION (below 50 °F), C-21e SOLAR AIR-CONDITIONING, C-21f CHILLED AND HOT WATER SYSTEMS.	NAC 624.380 (scope); C-21a…C-21g subclassifications	S-NV-NAC-380
C-37	Contractor's License (issued to the business — individuals, partnerships, corporations, limited liability companies or joint ventures; 'The license belongs to the business and not the qualifying party' — NSCB General Requirements; qualified by a qualifying individual with 4 years of classification experience in the preceding 15 years — NRS 624.260(6))	Solar contracting	NAC 624.540: 'design, fabricate and install systems for the collection of solar energy to heat and cool water, air and chemicals' — C-37a WATER HEATING, C-37b SPACE HEATING, C-37c AIR-CONDITIONING, C-37d HEATING OF POOLS.	NAC 624.540 (scope); C-37a…C-37d subclasses	S-NV-NAC-540
C-39	Contractor's License (issued to the business — individuals, partnerships, corporations, limited liability companies or joint ventures; 'The license belongs to the business and not the qualifying party' — NSCB General Requirements; qualified by a qualifying individual with 4 years of classification experience in the preceding 15 years — NRS 624.260(6))	Installing heaters	NAC 624.560: 'install devices for the heating of buildings, including wood-burning devices and their appendages. This license does not authorize the holder to install piping, ducting and equipment for transmitting the heated air or water produced by the devices.'	NAC 624.560	S-NV-NAC-560

The three-way solar boundary

Photovoltaic roof tiles that replace existing roofing are C-15a (NAC 624.320); PV cells, batteries and inverters are C-2g (NAC 624.200 — but NOT electrical wires beyond the service panel); solar THERMAL — heating/cooling water, air and chemicals — is C-37 (NAC 624.540). Three classifications, three verbatim scopes, no merging.

04 How each credential is earned

Qualifying individual — four full years of experience as journeyman, supervising employee or contractor in the specific classification within the preceding 15 years, as a bona fide member or employee of the business (NRS 624.260). S-NV-624-260
Exams — the qualifying individual must pass the Business and Law (CMS) exam plus the trade exam specific to the classification requested, unless waived — via PSI (Las Vegas, Reno, Elko); 3 attempts, pass within 6 months of filing, third failure voids the application (reapply after 30 days). "Not all classifications require a trade exam" — but the board never published WHICH, so no classification here is called exam-free. S-NV-REQ-PAGE
Waivers — endorsement (4 years active licensure, no discipline) and NASCLAI-accredited routes waive the trade exam/experience; whether the B&L exam can also be waived is CONFLICT-NV-004 below. S-NV-NAC-600
Financial statement — always required, in one of four tiers by requested monetary limit (the $10k–$25k band is contested — CONFLICT-NV-002). S-NV-REQ-PAGE

05 Deterministic scope limits

nevada:c-1 — pipes and vents for lp and natural gas into buildings (NAC 624.190 (C-1g)) S-NV-NAC-190
The gas-piping boundary next to C-1h water heaters (connection to EXISTING gas lines is C-1h; new piping into the building is C-1g).
nevada:b-2 — construction and remodeling of houses up to 3 stories above and 1 story below ground (NAC 624.170(2)) S-NV-NAC-170
The answer when a project adds NEW enclosed space or is new construction — including home additions, because B-7 may not increase enclosed space (SCOPE-NV-B7-NO-ADD). Rule NV-REMODEL-CLASS picks B-2 vs B-7 from the enclosed-space fact.
nevada:b-7 — remodeling and improvement of existing detached stand alone single family residences (NAC 624.170(7)) S-NV-NAC-170
No dollar trigger of any kind — Nevada has no licensing threshold (REQ-NV-NO-THRESHOLD-001).
nevada:b-7 — increasing the existing enclosed space of the residential structure (NAC 624.170(7)) S-NV-NAC-170
The home-addition boundary in one sentence — rule NV-REMODEL-CLASS evaluates facts remodel_adds_enclosed_space / project_adds_enclosed_space and returns B-2 when space is added. Also why the standalone home-addition page is withheld: the answer is fully determined by this row + NRS 624.700 (research §L/§R).
nevada:b-6 — interior remodeling of commercial structures including over three stories (NAC 624.170(6)) S-NV-NAC-170
nevada:b-6 — installation removal or modification of structural mechanical fire protection or life safety systems (NAC 624.170(6)) S-NV-NAC-170
nevada:c-1 — any c 1 subclassification work (NAC 624.190) S-NV-NAC-190
nevada:c-1 — plumbing systems sanitary drainage hydronic heating irrigation potable water heating and building edge piping (NAC 624.190 (C-1d)) S-NV-NAC-190
The plumbing answer for fixtures, vents and potable-water systems (bathroom-remodel page).
nevada:c-1 — installation replacement and repair of water heaters with connections venting (NAC 624.190 (C-1h)) S-NV-NAC-190
The water-heater-replacement page's license answer, verbatim — rule NV-PLUMBING-CLASS. This subclass exists within primary C-1; it is not a separate license (FAQ #10).
nevada:c-1 — heating evaporative cooling and air circulation systems including solar equipment (NAC 624.190 (C-1f)) S-NV-NAC-190
The non-refrigeration heating/evaporative-cooling path — rule NV-HVAC-CLASS picks C-1f vs C-21 from the equipment facts.
nevada:c-1 — cooling systems which use refrigeration as an integral part of the system (NAC 624.190 (C-1f)) S-NV-NAC-190
Half of the C-1f/C-21 heating-cooling boundary that rule NV-HVAC-CLASS evaluates.
nevada:c-2 — electrical wires fixtures apparatuses raceways conduits and wind energy conversion systems (NAC 624.200) S-NV-NAC-200
nevada:c-2 — residential wiring up to 600 volts on structures up to 3 stories (NAC 624.200 (C-2f)) S-NV-NAC-200
The usual residential electrical answer — rule NV-ELEC-CLASS evaluates the voltage/story facts (missing facts → NOT_DETERMINED).
nevada:c-2 — photovoltaic cells batteries and inverters up to the service panel (NAC 624.200 (C-2g)) S-NV-NAC-200
The PV-electricity leg of the three-way solar boundary: PV roof tiles replacing roofing = C-15a; PV cells/batteries/inverters to the panel = C-2g; solar thermal = C-37 (research §D).
nevada:c-3 — carpentry repairs insulation overhead doors and drywall (NAC 624.210) S-NV-NAC-210
The minor-repair/carpentry classification behind most non-exempt small-job answers (rule NV-REPAIR-EXEMPT context).
nevada:c-4 — painting decorating wallcovering surface prep drywall metal studs acoustical tile (NAC 624.220) S-NV-NAC-220
nevada:c-5 — concrete pour place finish install forms sealants and coring (NAC 624.230) S-NV-NAC-230
nevada:c-15 — installation application alteration and repair of watertight weatherproof roof materials (NAC 624.320 (C-15a)) S-NV-NAC-320
The roof-replacement page's license answer, verbatim — rule NV-ROOFING-CLASS. Note PV roof tiles are expressly inside C-15a; their electrical side is not (SCOPE-NV-C15A-NO-ELECTRICAL).
nevada:c-15 — installing conduits inverters batteries or electrical connections (NAC 624.320) S-NV-NAC-320
The C-15a/C-2g boundary that rule NV-ROOFING-CLASS publishes; C-37 covers solar THERMAL (research §D).
nevada:c-20 — installation of ceramic and other tile like products by suction and adhesives (NAC 624.370) S-NV-NAC-370
The tile component credential on the bathroom-remodel page.
nevada:c-21 — installation repair service and maintenance of temperature control equipment and related ductwork (NAC 624.380 (C-21b)) S-NV-NAC-380
The HVAC-replacement page's license answer — rule NV-HVAC-CLASS.
nevada:c-21 — c21d maintenance work outside parts replacement condenser air handler or design altering work (NAC 624.380 (C-21d)) S-NV-NAC-380
'Is a tune-up enough, or does this need the full AC license?' — the maintenance-limit boundary published on the hvac-replacement page (research §L.4).
nevada:c-37 — solar thermal systems to heat and cool water air and chemicals (NAC 624.540) S-NV-NAC-540
The thermal leg of the three-way solar boundary published on the classifications page (research §D).
nevada:c-39 — devices for the heating of buildings including wood burning devices (NAC 624.560) S-NV-NAC-560
nevada:c-39 — piping ducting and equipment for transmitting the heated air or water (NAC 624.560) S-NV-NAC-560
Why water-heater replacement is C-1h and NOT C-39 (research §L.5) — published on the water-heater page next to SCOPE-NV-C1H-WATER-HEATER.

These limits feed the deterministic rules (NV-ROOFING-CLASS, NV-REMODEL-CLASS, NV-ELEC-CLASS, NV-HVAC-CLASS, NV-PLUMBING-CLASS, NV-SPECIALTY-INCIDENTAL) that project pages evaluate first.

06 Conflicts on this page

Open conflictCONFLICT-NV-004Endorsement exam waiver scope: FAQ #5 'must still … pass the Business and Law Examination' vs FAQ #19 (waiver covers trade exam + experience certification)

Source AS-NV-FAQ

NSCB General Requirements FAQ #5 (official, read 2026-10-04): endorsement requires 4 years of active licensure in the endorsing state with no discipline — and applicants 'must still qualify by taking and passing the Business and Law Examination.'

FAQ for General Requirements #5 | Nevada State Contractors Board

retrieved 2026-10-04

Source BS-NV-FAQ

NSCB General Requirements FAQ #19 (same page, same read): the endorsement waiver is described as waiving the TRADE exam and the experience certification — silent on the Business and Law exam, implying it is not what the endorsement waives.

FAQ for General Requirements #19 | Nevada State Contractors Board

retrieved 2026-10-04

Statusneither value published

OPEN — both texts sit on the SAME official board page and do not clearly agree on whether a B&L waiver is available to endorsement applicants. HANDLING: REQ-NV-EXAM-WAIVER-001 carries confidence 'conflicting' and publishes both readings; NO deterministic rule asserts that the B&L exam can be waived by endorsement (rule engine stays conservative — research §J/§O).

Analysis notes

Detected 2026-10-04 while reading FAQ #5/#19 for REQ-NV-EXAM-WAIVER-001. NAC 624.600(2)-(3) waiver mechanics are not themselves in conflict — only the B&L overlay.

Checked and found consistent

The verbatim NAC scope texts (Cornell LII reproductions carrying the board's LCB amendment notes) agree with the board's own classification page wherever both quote the same scope; the FAQ #9 count (36) agrees with the NAC enumeration — only the board page's "42 Subcategories" heading diverges, recorded above.

07 Sources

S-NV-624-260statute

Nevada Legislature (NRS / NAC official host)

NRS 624.260 — Qualifying party: experience, knowledge, one active license

https://nevada.public.law/statutes/nrs_624.260