City of Las Vegas

Las Vegas design values (below 1,600 ft elevation): Ground snow load 5 psf; Design wind speed 98 mph; Seismic Design Category D; Frost line depth 1 ft; Termite: Moderate to Heavy. These SNBO-published values replace the generic IRC table and govern all structural design.

SNBO 2024 IRC Amendment, Table R301.2

Sleeping room floor live load is set at 40 psf per SNBO local amendment (footnote: actual live load governs when known to exceed table values). All other residential floor live loads per 2024 IRC Table R301.5.

SNBO 2024 IRC Amendment, Table R301.5

Section R401.3 is locally amended for desert conditions. Drainage must slope away from foundations. The SNBO amendment modifies the base IRC requirement to address local soil and drainage conditions.

SNBO 2024 IRC Amendment §R401.3

Plans must show all footings, posts, bearing walls, slabs, stem walls, anchor bolts, hold-downs, reinforcement size/depth, and material specs. A soils report is required for all new structures with a footprint of 600 sq ft or greater.

CLV Residential Submittal Requirements §1.3.B; IRC R401.4

Framing plans must show trusses, joists, beams, headers, bearing walls, and all framing hardware. Lateral force resisting system must document shear walls, drag struts, collectors, diaphragm, nailing schedule, and hold-downs. A complete load path must be demonstrated from point of load to all resisting elements.

CLV Residential Submittal Requirements §1.3.C; 2024 IRC Chapter 6

Special inspections are required per the CLV Quality Assurance and Approval (QAA) procedures. QAA1 through QAA9 procedures govern reporting, non-compliance, revisions, final reports, structural observation, and epoxy anchor inspections.

CLV QAA Special Inspection Program; IBC Chapter 17

Truss design and shop drawings must be prepared, stamped, and signed by a Nevada-licensed engineer and submitted prior to permit issuance (or via deferred submittal). The truss fabricator must appear on the Clark County approved fabricators list. The Engineer of Record must confirm truss calculations comply with design intent.

CLV Residential Submittal Requirements §1.3.C; IRC R802

A 2-inch clearance must be maintained between the cool deck and stucco weep screed. Standard Detail G-100 governs AC drainage swale bypass details at buildings.

SNBO Standard Detail G-100

Masonry fences must be constructed per SNBO Regional Standard Detail B-100-1. Fences with wrought iron must follow B-101. Wrought iron fences follow B-114. Chain link fences follow B-115. Walls shown on civil plans are for grading review only — a separate building permit is required.

CLV General Notes §16; SNBO B-100-1

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

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

IRC Sections R905.7 (built-up roofing) and R905.8 (modified bitumen) are amended for local desert climate conditions addressing high UV exposure and extreme heat.

SNBO 2024 IRC Amendment §R905.7, §R905.8

Section R406.2 (foundation waterproofing and dampproofing) is specifically amended for Southern Nevada conditions. When basements are installed, plans must show a cross-section with materials, exterior waterproofing, and egress window well details.

SNBO 2024 IRC Amendment §R406.2; IRC R406

For new structures, plans must show service load calculations, all outlets, lights, and smoke detectors. An auto-calculate residential electrical load calculation form (May 2026 version) is published by CLV. 2023 NEC is in effect as of January 5, 2026.

CLV Residential Submittal Requirements §1.7; 2023 NEC

Gas piping installed underground beneath buildings is extensively amended. All gas lines under slabs and foundations must be sleeved per UPC §1210.1.6. Three standard details govern installation: P-102, P-103, and P-104. LP gas procedures follow P-101.

SNBO 2024 UPC §1210.1.6 as amended; CLV Standard Details P-101 through P-104

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

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)

Plans must show location, size, and material of all water and DWV piping. Fixture types shown by symbol with water supply fixture unit count and required meter size per UPC Table 610.4. Gas piping requires BTU/h demands, pipe lengths, and materials. Water heater location, type, and combustion air requirements must be shown.

CLV Residential Submittal Requirements §1.9; 2024 UPC

Water heater strapping must follow Standard Detail P-105. A Tankless Water Heater Guideline is separately published. Location, type, size, and combustion air requirements must be shown on plans.

CLV Standard Detail P-105; 2024 UPC

Any manmade decorative water feature greater than 18 inches of maximum water depth must meet full swimming pool requirements. Features 18 inches or under on single-family residential property for exclusive family use are exempt.

SNBO 2024 ISPSC Amendment, Chapter 2 Definitions

Pool finishes must be at least 6.5 on the Munsell gray scale. Exceptions include competitive lane markings, diving well floors, step/bench edge markings, and waterline tiles.

SNBO 2024 ISPSC Amendment §307.1.2.1

For one- and two-family dwellings, barrier top must be at least 60 inches above grade (measured away from pool). For public pools: 72 inches minimum. Gate latch release for residential pools must be at least 54 inches above grade. Self-latching latches must be on the pool side at least 3 inches below gate top.

SNBO 2024 ISPSC Amendment §305.2.1, §305.3.3

The Las Vegas Valley Water District limits the total combined water surface area of new swimming pools, spas, and water features on a single-family residential parcel to a maximum of 600 square feet. LVVWD must approve all pool/spa permits prior to CLV permit issuance.

LVVWD Service Rules; 2024 ISPSC

Two options for soils: (A) designer certifies worst-case conditions (min. lateral bearing 60 psf/ft, Exposure Class S2 severe sulfate); or (B) site-specific soils report. An excavation-only permit is available, but no pool permit is issued until soils report is received.

SNBO 2024 ISPSC Amendment §307.2.2

A Technical Drainage Study must be conditionally approved before submitting improvement plans. Minimum finish floor elevation is 6 inches above the highest adjacent top of curb. Minimum road slope is 0.4%; where this cannot be met, an 18-inch minimum storm drain must be provided.

CLV Minimum Drainage Study Criteria (Standard Form 2 Supplement, revised 5/7/26); LVMC 14.18.130

Off-site concrete: Type V cement required, minimum 3,000 PSI @ 28 days, mix designs approved by City prior to use. AC pavement must be 1/2 inch above lip of all gutters after compaction. Asphalt mix design must be submitted and approved by City Engineer prior to placement in City ROW.

CLV General Notes §5, §8, §17 (Jan 2026)

Retaining walls must follow SNBO Regional Standard Detail B-100-2. Wall heights may not exceed 14 feet above adjacent property in any case. Walls shown on civil plans are for grading review only — a separate building permit and building department inspection is required for all walls.

CLV General Notes §16; SNBO B-100-2

Each townhome lot must have an individual sewer lateral to its mapped lot. Sewer laterals shall not be located under residential driveways unless no alternative; if unavoidable, a traffic-rated cleanout per SD-24 must be installed outside ROW. PVC pipe: ASTM D-3034 SDR 35 with sand bedding.

CLV General Notes — Sewer Notes (Jan 2026); CLV DCSWCS Addendum §2.3.10

Contractor must remove all sediment, mud, and debris from public ROW daily. Temporary or permanent stabilization must be installed within 14 days after construction ceases. Inspect all disturbed areas weekly and within 24 hours after any rain event of 0.5 inches or more. Post-Construction BMPs are mandatory permanent regulatory controls.

CLV General Notes — Stormwater Notes (Jan 2026); Nevada General Permit NVR100000; LVMC 14.18.130

Underground utilities are required by default. A waiver may be requested for non-underground utilities. Contractor must provide written documentation certifying all locating devices are placed and verified before road base construction. CLV does not use marker balls or pipe locator ribbon — uses open-trench utility survey inspection.

CLV General Notes §20–21 (Jan 2026)

CCTV video inspection is required for all sewer and storm drains prior to acceptance. Videos must be performed per the Design and Construction Standards for Wastewater Collection Systems, latest edition.

CLV General Notes §22 (Jan 2026)

A Civil Fire Flow Information Block must be included on all civil plans. Civil General Notes for Hydrants and Access must be referenced on all improvement plans.

CLV Civil General Notes for Hydrants and Access

All public offsite construction must comply with the Uniform Standard Specifications (USS) and Uniform Standard Drawings (USD) for Public Works Construction, Clark County Area Nevada. CLV Special Provisions and CLV General Notes (Jan 2026) supplement these standards and must appear on all civil improvement plans.

CLV General Notes §1 (Jan 2026)

CLV publishes specific Mass Grading Guidelines governing large-scale grading operations for subdivision development. All revisions to approved grading plans require prior written approval of the City Engineer.

CLV Mass Grading Guidelines; CLV General Notes §4

Public sewer mains located 5 feet from street centerline where possible; not closer than 8 ft from back of curb with sidewalk, 10 ft without. Minimum pipe: 6-inch for multi-family/commercial. Capacity: d/D = 0.50 max for 8-15 inch pipe. No HDPE allowed. C900 DR-25 preferred. No public pumping stations permitted in Las Vegas.

CLV DCSWCS Addendum (2019, 4th Ed., revised 02/24/2025) §2.3.2, §2.3.20, §3.7

New development must connect to public sewer whenever available within 400 feet of the nearest property line and reachable by gravity. For subdivisions with 5+ single-family units, connection required when sewer is within (units × 100 ft). As of January 1, 2021, LVVWD will refuse potable water service to new development discharging to a septic tank.

NAC 444.786; NAC 278.460; LVVWD Service Rules Chapter 4 §4.5(e); LVMC 14.04.120

New streetlight services: 200 AMP padmount, capacity for 20 or 24 circuits. All luminaires must be LED from CLV-approved fixture list. Empty conduit requires one green #8 AWG tracer wire. Luminaires adjacent to residential housing must have manufacturer-provided house-side shields.

CLV General Notes — Street Light Notes (Jan 2026); USS §623

All traffic signal work requires an IMSA Level II Certified Technician on site. Approved controllers: Swarco McCain Flex or Econolite Cobalt with D4 software. All vehicle and pedestrian signal indications must be LED. Pedestrian push buttons: Audible tactile Polara iNavigator type, mounted 42 inches above sidewalk. Work within 300 feet of a signalized intersection must be performed at night.

CLV General Notes — Traffic Signal Notes (Jan 2026)

All permanent traffic control devices must be in place before opening any portion of road to public traffic. All permanent signs must use Type XI retroreflective sheeting per CCAUSS §627 and §716 with anti-graffiti overlay film.

CLV General Notes — Traffic Notes (Jan 2026); MUTCD latest edition