Sub-sections in this division:
Attic Access — Size and Clearance
Required where vertical height ≥ 30 in over at least 30 sq ft. Rough opening minimum 22 in × 30 in. Ceiling access requires 30-in clear headroom above on at least one side. Where mechanical equipment is in attic, access must also comply with UMC Section 304.4.
IRC R807.1 (locally amended)
Attic Ventilation — Climate Zone 3B (Henderson)
For Climate Zone 3B (Henderson below 4,000 ft elevation): no rigid board or air-impermeable insulation is required for condensation control at the roof plane. This is a relaxation from colder-climate requirements.
IRC Table R806.5 (locally amended)
Electrical Service — NEC 2023 with Southern Nevada Amendments
Electrical work governed by 2023 NEC with Southern Nevada Amendments. Standard new residential service is 200-amp minimum. NV Energy Electric Service Requirements (Southern Nevada) govern utility service conductors and meter installation. Pool electrical: minimum #10 wire feeder with 30-amp breaker; timer boxes are NOT permitted as disconnect for pool motors.
2023 NEC (Clark County Amended) / HMC Chapter 15.28
Fireplace Restrictions — Las Vegas Valley (Below 4,000 ft)
No solid-fuel burning fireplace permitted below 4,000 ft elevation in the Las Vegas Valley Hydrographic Basin unless EPA Phase II certified or a masonry fireplace with gas logs and sealed glass cover. Required sign: "Approved for fuel gas use only." Sleeping-room fireplaces require a permanent 4-in fresh air duct from exterior to firebox.
IRC R1007 / R1008 (locally added via SNBO amendment)
HVAC — ACCA Manual J Design Required
HVAC systems must be designed using ACCA Manual J load calculations based on local climate criteria (Climate Zone 3B, mean annual temp 66.3°F). Duct sealing and insulation required per 2024 IECC; ducts in unconditioned spaces must be insulated.
UMC 2024 with Southern Nevada Amendments / HMC Chapter 15.24
Attic Ventilation
Attic ventilation location, size, and calculations must be shown on plans. Table R806.5 is amended for Southern Nevada desert conditions, reducing minimum ventilation ratios compared to base IRC to account for the dry climate.
SNBO 2024 IRC Amendment, Table R806.5; R806
HVAC Plan Requirements
Plans must show heating/cooling unit capacity and location. Duct work type and insulation must be specified. Exhaust fans, dryer vent location, and attic/roof-mounted equipment support details are required. Access and platform must be detailed when roof pitch exceeds 4:12. Duct area detector tests are required.
CLV Residential Submittal Requirements §1.8; 2024 UMC
NEC Key Local Amendments — Grounding
Grounding electrode system is extensively amended for desert soil conditions. Rod/pipe electrodes must be driven to 8 feet depth; if rock prevents this, the electrode must be buried in a trench at least 2.5 feet deep. Abandoned conductors must be removed from all structures — not left in place.
SNBO 2023 NEC Amendments §250.50, §250.52, §250.53; §110.12(D)
Wall Coverings & Stucco
Exterior wall coverings must specify components, thickness, and material on elevation drawings. One-coat stucco systems require an approved applicator — owner/builders cannot apply one-coat stucco systems. Roofing must be specified by type, manufacturer name, and product name.
CLV Residential Submittal Requirements §1.5
Adopted Codes — Same SNBO Amendments as Henderson
City of North Las Vegas uses the same 2024 IBC, IRC, UPC, UMC, NEC, IECC, and ISPSC with Southern Nevada (SNBO) amendments as Henderson. All technical building requirements in Categories 1–5 are identical. Effective date: January 11, 2026. See Henderson entries for full technical details.
NLV Municipal Code Chapter 15.72 / NLV Current Adopted Codes