What Building Codes Apply in Clark County in 2026?
Clark County made a major code-cycle change for 2026. For most new building permit applications filed on or after January 11, 2026, the County moved from its older 2018 code cycle to the 2024 construction codes, together with Southern Nevada and Clark County amendments.
There is one important catch before you use any of these codes: make sure the property is actually under Clark County jurisdiction. A Las Vegas mailing address does not automatically mean the City of Las Vegas is the building authority. Large parts of the Las Vegas Valley—including the Las Vegas Strip—are in unincorporated Clark County.
Clark County Adopted Building Codes for 2026
The following code editions are the primary technical standards listed by the Clark County Building Department for the current 2026 cycle.
| Code area | 2026 adopted edition | Clark County reference | Main use |
|---|---|---|---|
| Building | 2024 International Building Code (IBC) | Title 22, Chapter 22.04 Ordinance 5271 |
Commercial, multifamily and other buildings within IBC scope |
| Residential | 2024 International Residential Code (IRC) | Title 22, Chapter 22.05 Ordinance 5272 |
Qualifying one- and two-family dwellings and townhouses |
| Existing buildings | 2024 International Existing Building Code (IEBC) | Title 22, Chapter 22.11 Ordinance 5273 |
Alterations, repairs, additions, relocation and changes of occupancy |
| Pools and spas | 2024 International Swimming Pool and Spa Code (ISPSC) | Title 22, Chapter 22.20 Ordinance 5274 |
Swimming pools, spas and related safety requirements |
| Electrical | 2023 National Electrical Code (NEC) | Title 25, Chapter 25.04 Ordinance 5275 |
Electrical wiring, equipment and installations |
| Plumbing | 2024 Uniform Plumbing Code (UPC) | Title 25, Chapter 25.08 Ordinance 5276 |
Plumbing systems and related installations |
| Mechanical | 2024 Uniform Mechanical Code (UMC) | Title 25, Chapter 25.16 Ordinance 5277 |
HVAC, ventilation and mechanical systems |
| Energy | 2024 International Energy Conservation Code (IECC) | Title 25, Chapter 25.20 Ordinance 5278 |
Building-envelope, lighting and energy-efficiency requirements |
All eight ordinances above were approved by the Clark County Commission on July 15, 2025 and took effect January 11, 2026.
Clark County Fire and Wildland Codes
Building plans may also be affected by separate fire-code requirements. Clark County adopted the 2024 International Fire Code through Ordinance 5321, effective January 1, 2026. Clark County’s published fire-code amendments include local changes and referenced fire-protection standards.
The County also adopted the 2024 International Wildland-Urban Interface Code through Ordinance 5320, effective January 1, 2026. Its requirements can become important where a project falls within an applicable wildland-urban interface area.
Fire requirements should not be treated as an optional add-on to the building code. Depending on the project, fire access, water supply, sprinklers, alarms, hazardous materials, emergency systems or fire-resistance requirements can affect a design before the building permit is approved.
First Check: Is Your Property Really in Clark County Jurisdiction?
This is one of the easiest places to make an expensive mistake.
Clark County contains separate permitting jurisdictions, including the cities of Las Vegas, Henderson, North Las Vegas, Boulder City and Mesquite, plus unincorporated Clark County. Each jurisdiction can adopt its own ordinances and amendments.
A property can have “Las Vegas, NV” in its mailing address and still be outside the City of Las Vegas. The Las Vegas Strip is a well-known example of an area served by unincorporated Clark County.
Go to the Clark County jurisdiction and property map.
Use the exact street address or parcel information rather than relying only on the city name shown in a mailing address.
If the property is in unincorporated Clark County, continue with the Clark County codes below. If the map places it inside an incorporated city, check that city’s adopted code and amendments instead.
If you are working elsewhere in Nevada, do not carry Clark County’s code editions over to another jurisdiction. For example, our Carson City Building Department guide explains that jurisdiction’s separate permit and code process.
Which Code Applies to Your Project?
| Project | Codes commonly involved | Also check |
|---|---|---|
| New single-family home | IRC, NEC, UPC, UMC, IECC | Zoning, fire, soils, grading and local amendments |
| Home addition or major remodel | IRC and/or IEBC plus trade codes | Existing conditions, setbacks, energy requirements and permit history |
| Commercial building | IBC, NEC, UPC, UMC, IECC | Fire Code, accessibility, zoning and special inspections |
| Apartment or condominium project | IBC plus applicable trade and energy codes | Fire/life safety, accessibility and zoning |
| Commercial tenant improvement | IBC or IEBC plus electrical, plumbing and mechanical codes | Occupancy, egress, accessibility, fire protection and change of use |
| Swimming pool or spa | ISPSC plus applicable electrical, plumbing and structural provisions | Barrier, setback, zoning and equipment requirements |
| Electrical upgrade | 2023 NEC with Southern Nevada amendments | Permit requirements and utility coordination |
| HVAC replacement or installation | 2024 UMC and applicable energy provisions | Electrical, equipment and permit requirements |
| Plumbing alteration | 2024 UPC | Permit exemptions, fixture requirements and related building work |
| Repair or alteration of an older building | 2024 IEBC | IBC, fire, accessibility and change-of-occupancy requirements |
This table is a starting point, not a substitute for project classification. A single permit can involve several codes at the same time.
How Clark County’s Local Amendments Work
The words “2024 IBC” do not tell the whole story. Clark County’s Building Code is made from several layers.
- Clark County Code and County-specific provisions.
- Southern Nevada amendments adopted by Clark County.
- The underlying national model code, such as the 2024 IBC.
For the Building Code specifically, Clark County Code Chapter 22.04 states that when County provisions conflict with the Southern Nevada amendments or the base IBC, the County provision controls. When a Southern Nevada amendment conflicts with the base IBC, the Southern Nevada amendment controls.
This hierarchy matters. Searching a model-code section online and stopping there can give you an incomplete answer.
2026 update to the IBC amendments
Clark County’s official code library currently identifies its 2024 IBC Southern Nevada Amendments as Clark County Amended, July 2026. For a project being designed or corrected later in 2026, use the current County-posted amendment document rather than an older copy saved by a contractor, architect or project manager.
The current amendment package covers many areas, including occupancy provisions, fire protection, means of egress, accessibility, structural design, special inspections, soils and foundations, plumbing fixtures and locally adopted appendices.
Building Administrative Code
Clark County’s code library continues to list the 2018 Building Administrative Code of Clark County. Do not confuse its edition name with the technical code cycle.
The 2024 IBC amendment package deletes IBC Sections 103 through 116 and directs users to the local Building Administrative Code for administration and enforcement. That local code addresses subjects such as permits, applications, inspections and administrative procedures.
What Happened to the Old 2018 Codes?
You may still see the 2018 IBC, IRC, IEBC, UMC, UPC and other older documents in Clark County’s online code library. Their presence does not mean they are the normal choice for a new permit application in late 2026.
The County’s transition notice set these deadlines:
- Applications intended for review under the old 2018 code cycle generally had to be submitted by January 10, 2026.
- New applications filed on or after January 11, 2026 generally moved to the newly adopted code cycle.
- For non-standard-plan applications submitted under the 2018 cycle, the permit generally had to be obtained by July 9, 2026.
- If that deadline was missed, the County notice stated that the application would expire and a new application complying with the new codes would be required.
Clark County provided a separate transition path for certain qualifying residential standard-plan subdivisions. If you are dealing with an older tract-home standard plan, confirm its individual status rather than assuming either code cycle automatically applies.
2024 Energy Code Requirements in Clark County
Clark County specifically states that new building permit applications from January 11, 2026 must demonstrate compliance with the 2024 International Energy Conservation Code.
The County’s Southern Nevada IECC amendments affect both residential and commercial energy provisions. Construction documents may need to show items such as the selected energy-compliance path, insulation values, fenestration performance, air-sealing information, mechanical-system criteria, equipment efficiencies, duct and pipe insulation, lighting data and other project-specific energy information.
The local amendment also addresses climate conditions. Areas of Clark County located above 4,000 feet are treated as Climate Zone 5B for the specified IECC provisions. This can matter for higher-elevation locations such as projects in the Mount Charleston area.
Does Your Project Need a Building Permit?
Clark County states that a permit is generally required before regulated work involving construction, enlargement, alteration, repair, relocation, demolition or a change of occupancy, as well as regulated electrical, gas, mechanical and plumbing work.
There are exemptions, but an exemption from a building permit does not automatically remove zoning, fire, utility or other requirements.
How to Find the Exact Clark County Code for Your Project
You do not need to jump between random code websites. Use this order.
Search the property in the official Clark County jurisdiction map.
Decide whether the work is residential, commercial, existing-building work, a pool, electrical, plumbing, mechanical or another specialty project.
Go to the Clark County Building Department code library.
For example, a commercial project may require the 2024 IBC plus the current Clark County/Southern Nevada IBC amendments.
Use the Clark County Code to see the legally adopted language and any provisions that supersede the model code.
Clark County publishes building permit guides, technical guidelines, policies and code interpretations that can affect how a requirement is administered.
If a code section is unclear, give staff the property address, permit number if one exists, project scope and the exact section you are trying to interpret.
Official Clark County Building Code Resources
Current codes, amendments, policies, technical guidelines, interpretations, permit guides and forms.
Open the official code library
Chapter 22.04 contains the County’s formal adoption of the 2024 International Building Code and its amendment hierarchy.
Read Chapter 22.04
Title 25 contains the County’s adopted trade-code framework, including the NEC, UPC, UMC and IECC.
Open Clark County Code Title 25
Current Fire Code, County amendments, bulletins, interpretations and related fire-prevention documents.
Open the Fire Prevention Library
Project-specific guidance is available for houses, room additions, pools, tenant improvements, grading, commercial projects and other work.
Browse Clark County permit guides
Use the County’s online system for permit records, applications and other available permit services.
Open Citizen Access information
Clark County Building Department Contact
| Department | Clark County Building Department |
|---|---|
| Address | 4701 West Russell Road, Las Vegas, NV 89118 |
| Phone | (702) 455-3000 |
| Published office hours | Monday–Thursday, 7:30 a.m.–5:30 p.m.; Friday closed |
| Permit portal | Citizen Access Portal |
Before visiting, check the official department page for holidays, temporary closures or service changes.
Common Mistakes to Avoid
- Using City of Las Vegas rules for an unincorporated Clark County property. Verify the jurisdiction first.
- Reading only the base 2024 IBC. Always check Southern Nevada and Clark County amendments.
- Assuming an old 2018 code PDF is still the current code for a new project. The new cycle became effective January 11, 2026.
- Ignoring trade codes. A building permit can involve electrical, plumbing, mechanical and energy requirements at the same time.
- Assuming permit exemption means zoning exemption. Title 30 and other development requirements can still apply.
- Using an old downloaded amendment. The County’s IBC amendment package is currently identified as amended in July 2026.
- Starting work before confirming permits. Regulated work generally requires authorization before construction begins.
Building-code adoption works differently across the United States. Nevada relies heavily on local adoption, similar in some respects to the jurisdiction-by-jurisdiction system explained in our Arizona building code guide. That is why checking the actual permitting authority is more reliable than simply searching for “Nevada building code.”
Clark County Nevada Building Code FAQs
1. What building code does Clark County, Nevada use in 2026?
For new qualifying permit applications, Clark County uses the 2024 International Building Code with Southern Nevada and Clark County amendments. The updated code became effective January 11, 2026.
2. What residential code does Clark County use?
Clark County adopted the 2024 International Residential Code with Southern Nevada amendments. It became effective January 11, 2026 and applies to qualifying residential construction within its scope.
3. Which electrical code is used in Clark County in 2026?
Clark County adopted the 2023 National Electrical Code, together with Southern Nevada amendments, through Ordinance 5275.
4. Which energy code applies in Clark County?
The 2024 International Energy Conservation Code is the current energy code for qualifying new permit applications submitted from January 11, 2026. Local Southern Nevada amendments also apply.
5. Does Clark County still use the 2018 building code?
The 2018 codes remain available for older projects and records, but they are not the normal code cycle for a brand-new permit application in late 2026. Older permits and qualifying residential standard plans can have transition issues that should be checked individually.
6. Is the Clark County Building Code the same as the City of Las Vegas code?
No. Clark County and the City of Las Vegas are separate jurisdictions. A Las Vegas mailing address can be located in either one, so confirm the property jurisdiction before selecting a building code.
7. Does Clark County use the 2024 Fire Code?
Yes. Clark County adopted the 2024 International Fire Code with County amendments through Ordinance 5321, effective January 1, 2026.
8. Do Southern Nevada amendments really matter?
Yes. Clark County adopts model codes together with local amendments. For the IBC, County provisions can supersede Southern Nevada amendments, and Southern Nevada amendments can supersede the base IBC where the provisions conflict.
9. Where can I read the current Clark County building code amendments?
Start with the Clark County Building Department’s official code library. It provides the current adopted-code references, Southern Nevada amendments and many County policies, interpretations and technical documents.
10. Who should I contact if I cannot determine which code applies?
Contact the Clark County Building Department at (702) 455-3000 if the property is in the County’s jurisdiction. Have the property address, project description, permit number if available and the code section in question ready so staff can give a project-specific response.
Before You Design or Submit Plans
For a new Clark County project in 2026, the safest sequence is simple: confirm the jurisdiction, identify the project type, use the current adopted code, read the local amendments, check the project-specific permit guide and then submit through the County’s official system.
The most important point is not simply knowing that Clark County uses the 2024 IBC. The real requirement comes from the complete local code package: the model code, Southern Nevada amendments, Clark County ordinances, administrative provisions and any project-specific policies that apply.
If an architect, contractor or consultant gives you a code section from a saved PDF, compare it with the County’s current online library before relying on it. That small check can prevent redesigns and correction cycles later.
Independent information: USBuilding.org is not Clark County or the Clark County Building Department. Final code interpretations, permit decisions and project-specific requirements are determined by the responsible government authority. Information reviewed for the 2026 code cycle in October 2026. See our research and editorial standards for information about source verification.