Fees
Estimated city fees
Baseline for a simple permitted addition: $500–$2,000+ estimated city fees for a residential addition permit in Las Vegas (varies by project valuation, trade permits billed separately)
| Fee | Amount | Notes |
|---|---|---|
| Building permit (valuation-based) | $500–$2,000+ (estimated range for typical room addition) | Las Vegas residential permit fees are based on declared project valuation under the current Building & Safety fee schedule. Verify current amounts at lasvegasnevada.gov/permits before submitting. |
| Plan review fee | Included or charged at submittal based on scope | Standard residential plan review is included in the building permit fees. Express review is available for extra published fees. |
| Mechanical permit | $100–$350 (estimated) | Needed for HVAC extensions or new mechanical equipment. |
| Electrical permit | $100–$400 (estimated) | Needed for new circuits, panels, or service changes in the addition. |
| Plumbing permit | $100–$350 (estimated) | Needed for any new bathroom or wet area in the addition. |
Affiliate slot
Need a contractor?
Licensed contractor matching.
Conditions
The rules that apply
- Any addition that increases the enclosed floor area or structural footprint of a residential structure in Las Vegas needs a building permit.
- Las Vegas Building & Safety processes residential addition permits through its online building permits portal.
- An addition with a bathroom, laundry room, or wet area needs a plumbing permit on top of the building permit.
- An addition that extends HVAC ductwork or adds mechanical equipment needs a mechanical permit.
- New electrical circuits, subpanels, or service upgrades need a separate electrical permit.
- Additions must meet the City of Las Vegas Title 19 Zoning Code. Setbacks, lot coverage, height limits, and floor area standards vary by zone district.
- All conditioned additions must meet the Nevada energy code (2018 IECC with Nevada amendments).
- Las Vegas addresses near city boundaries may fall under Clark County or another Southern Nevada jurisdiction. Verify the correct building department before filing.
- Properties in designated historic or cultural overlay zones may need extra review from the city's Historic Preservation Commission.
Documents
What you'll need to file
- Residential building permit application, submitted through the City of Las Vegas online building permits portal.
- Site plan showing lot dimensions, property lines, setbacks, existing structures, and the proposed addition footprint.
- Floor plans for all affected levels showing existing and proposed layout with room dimensions and openings.
- Exterior elevations showing existing and proposed building height and materials.
- Foundation and framing details that match the scope.
- Energy code compliance documentation under the Nevada residential energy code.
- Structural calculations or engineer-stamped drawings for non-prescriptive spans or conditions.
- Owner-builder affidavit or licensed contractor information.
- Trade permit applications for any mechanical, electrical, and plumbing work in the scope.
Process
How the permit process works
Each step must finish before the next one starts.
-
Verify jurisdiction Confirm your address is within Las Vegas city limits and not under Clark County, Henderson, or North Las Vegas. Each has its own building department and review process.
-
Check zoning constraints Use the City of Las Vegas zoning map or contact Planning to confirm setbacks, lot coverage, and height limits for your zone. Because Las Vegas has a desert climate, also check any shade structure, cooling efficiency, and impervious surface rules that affect the addition design.
-
Hire a designer or architect Most residential additions need plans prepared by a Nevada-licensed architect or residential designer. Structural elements need engineer-stamped drawings.
-
Prepare and submit through the Las Vegas online permit portal Assemble the site plan, floor plans, elevations, structural details, energy documentation, and all trade applications. Log into the portal, start a new residential addition permit, upload all documents, and pay the fees.
-
Respond to plan review corrections Building & Safety reviewers check zoning compliance, structural details, energy code, and life safety. Respond to correction notices promptly and resubmit updated drawings through the portal.
-
Pay remaining fees and receive the permit Once approved, pay any balance, download the permit, and post it where it can be seen on site before construction starts.
-
Schedule inspections at required milestones Request inspections at the required stages, typically foundation, framing, insulation, and final. Trade inspections (electrical, plumbing, mechanical) have their own milestones. Do not cover work before it is inspected.
-
Pass final inspection and close the permit After all inspections pass, the permit is closed. Keep the documents for insurance, refinancing, and resale.
Affiliate slot
Tools & materials
Addition tools and supplies from Amazon.
Provenance
Code basis & official sources
Last verified 2026-05-07.
2024 International Residential Code (IRC) with Southern Nevada amendments adopted January 2026. Nevada energy code for residential additions. City of Las Vegas Title 19 Zoning Code for dimensional and land use standards.
Residential permit page: https://www.lasvegasnevada.gov/business/permits-licenses/building-permits/online-building-permits
If you skip the permit
- Las Vegas Building & Safety can issue a stop-work order and require you to remove unpermitted work.
- A retroactive permit may require opening completed walls for inspection.
- Home inspectors and mortgage lenders routinely flag unpermitted additions, which can delay or kill a sale.
- Insurance may deny claims on unpermitted living areas.
- An appraisal may not count unpermitted square footage.
- Code violations can bring daily fines until resolved.
FAQ
Common Las Vegas addition permit questions
Do I need a permit to add a room to my house in Las Vegas?
Yes, always. Any addition that increases the enclosed floor area or structural footprint of a Las Vegas residential building needs a building permit. There is no size exemption for room additions.
Which building department handles additions in Las Vegas?
If your address is within Las Vegas city limits, City of Las Vegas Building & Safety issues your permit. Clark County Building Department handles addresses in unincorporated Clark County. Henderson and North Las Vegas have their own departments. Verify jurisdiction before applying.
How much does an addition permit cost in Las Vegas?
Las Vegas permit fees are valuation-based. A typical room addition costs about $500–$2,000+ in city fees. Trade permits for electrical, plumbing, and mechanical work are billed separately. Verify current amounts at lasvegasnevada.gov/permits.
How long does Las Vegas plan review take for a room addition?
Standard residential review takes about 10–15 business days (roughly two weeks) per review cycle. Total project time, including corrections, construction, and inspections, is commonly 2–4 months.
Does my Las Vegas addition need to meet energy code?
Yes. All conditioned additions must meet Nevada's energy code. Las Vegas has a desert climate (Zone 2B or 3B depending on location), with specific insulation, window U-factor, and cooling-efficiency requirements for new conditioned space.
Can I act as my own contractor for a Las Vegas room addition?
Yes. Las Vegas allows owner-builders to pull permits for work on their own primary residence. You are still responsible for code compliance, for hiring licensed trade contractors for plumbing and electrical, and for passing all inspections.
§ A More permits for Las Vegas
§ B Compare across cities
§ C Companion calculators
Disclaimer: Informational only, not legal advice. Rules change. verify with Las Vegas permitting staff before you build.