Before You Build in Clark County, NV: Permit & Rule Checklist (2026)

Clark County requires a building permit for any retaining wall over 4 feet tall measured from footing to top. Engineering is required, and walls holding a surcharge load need a permit regardless of height.

Nevada has no good-neighbor fence statute requiring cost-sharing. Clark County treats neighbor fence disputes as civil matters; boundary walls follow the recorded property line and shared walls need mutual agreement.

Under NRS 461A, any residential pool over 18 inches deep in Clark County must have a 5-foot barrier with self-closing, self-latching gates. Mesh barriers and door alarms may serve as secondary barriers.

Unincorporated Clark County requires a building permit for any fence over 6 feet tall and for most masonry or block walls regardless of height. Wood and wrought iron under 6 feet typically need no permit.

Clark County Title 30 §30.64.020 limits single-family residential fences to 6 feet maximum. Fences over 3 feet not permitted within front yard setbacks. Gated communities allow 8-foot perimeter walls. Administrative deviation to 8 feet possible.

Unincorporated Clark County requires a building permit for all in-ground swimming pools, spas, and any pool exceeding 24 inches deep. Plans, barrier compliance, and drain anti-entrapment per federal VGB Act are required.

Unincorporated Clark County requires a permit for any hot tub or spa holding water deeper than 24 inches. A locking safety cover satisfying ASTM F1346 can substitute for a perimeter fence on many residential spas.

Unincorporated Clark County requires every residential swimming pool, spa, or artificial body of water to be enclosed by a non-climbable, four-sided barrier at least 60 inches high with self-closing, self-latching gates. Rules are codified at Clark County Code Chapter 22.20 (Swimming Pool and Spa Code), which adopts the International Swimming Pool and Spa Code (ISPSC) with Southern Nevada Amendments. The county adopted the 2024 ISPSC effective January 11, 2026.

Unincorporated Clark County regulates residential pool safety through Title 22 Chapter 22.20, which adopts the Southern Nevada Swimming Pool & Spa Code (SNPSC) — based on the International Swimming Pool & Spa Code (ISPSC). SNPSC Section 305 requires a residential barrier at least 60 inches tall (or 8-ft non-climbable measured inside), with no more than 4 inches of clearance below.

Unincorporated Clark County treats an above-ground pool as a regulated swimming pool under Title 22 Chapter 22.20 once it can hold water more than 24 inches deep, triggering the Southern Nevada Swimming Pool & Spa Code. The pool wall can serve as part of the barrier when it is at least 48 inches tall, but a removable or lockable ladder is required to prevent access.

Unincorporated Clark County regulates garage conversions to habitable space under Title 30 (Unified Development Code) and the locally adopted 2018 International Residential Code. Conversions to accessory apartments are permitted in the R-U, R-A, R-E, R-D, R-1, R-T, R-2, H-2, and H-1 zones, but unlike California, Clark County does not have a state mandate prohibiting replacement parking when a garage is converted.

Unincorporated Clark County regulates Accessory Dwelling Units (ADUs, locally called Accessory Apartments) under Title 30 (Unified Development Code). Recent code amendments have eliminated the minimum lot size requirement, removed the one-bedroom cap, and now explicitly allow basement ADUs. ADUs are permitted in the R-U, R-A, R-E, R-D, R-1, R-T, R-2, H-2, and H-1 zoning districts.

Sheds under 200 square feet and 12 feet tall generally need no building permit in Clark County but must meet Title 30 setback rules. Larger sheds or any shed with electrical or plumbing require a permit.

Carports in Clark County require a building permit when attached to the house or over 200 square feet. Freestanding metal carports must meet the 90 mph Las Vegas Valley wind design and Title 30 setbacks.

Unincorporated Clark County permits tiny homes under Title 30 (Unified Development Code) following Nevada SB 150 (2021), which requires Clark County to designate at least one zoning district for tiny houses as ADUs, as single-family residences, and in tiny house parks. The county code defines a tiny home as a detached single-family dwelling built on a foundation, minimum 150 sq ft, per the International Residential Code.

Open burning is prohibited in the Las Vegas Valley PM-10 nonattainment area under Clark County Air Quality Reg 52 and NRS 472.040. Limited ag or ceremonial burning needs permits from DES and Fire.

Clark County permits recreational fire pits without a permit under DAQ Regulation §42.1.2. Must be attended with fire extinguisher available. Gas fire features at commercial occupancies must be certified. 10-foot clearance from combustible construction.

Clark County requires property owners to trim trees overhanging public sidewalks to 8 ft clearance and streets to 14 ft. Private trees across property lines follow Nevada common law: neighbors may trim to the line.

Clark County follows SNWA mandatory water conservation rules due to Lake Mead crisis. AB 356 bans ornamental grass in commercial and HOA common areas by December 2026. Water Smart rebates incentivize turf removal.

Clark County has no heritage tree ordinance or specific tree removal permit. Existing mature tree preservation is encouraged but not mandated for single-family residential. Commercial redevelopment may get reduced tree ratios for preservation.