Accessory Structures in Boulder City, NV: What Residents Actually Need to Know
If you live in Boulder City or are thinking about moving there, accessory structures are one of those things you probably won't think about until they affect you directly. Boulder City has 5 specific rules on the books covering different aspects of accessory structures, and some of them might surprise you.
Tiny Homes
Boulder City permits tiny homes on foundations meeting full IRC requirements but generally does not allow tiny homes on wheels as permanent dwellings outside of approved RV parks.
Key details: Foundation-Built Tiny: Foundation-built tiny homes must meet IRC code. Irc Appendix: IRC Appendix Q applies to units under 400 sq ft. Tiny Homes: Tiny homes on wheels not permitted as residences. Adu Rules: ADU rules may allow smaller secondary dwellings. Parks Permit: RV parks permit tiny homes on wheels temporarily.
Contact your local code enforcement office for specific penalty information.
This is one of the stricter rules in Boulder City's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.
Carport Rules
Boulder City requires building permits for all carports regardless of size, with minimum 5-foot side setbacks and 20-foot front setbacks in most residential zones, and architectural review in HOA communities.
Key details: Building Permit Required: Building permit required for all permanent carports. 5foot Side And: 5-foot side and rear setbacks for detached carports. 20foot Front Setback: 20-foot front setback in most residential zones. Must Be 50: Must be 50 percent open on two sides minimum. Hoa Architectural Review: HOA architectural review required in planned communities.
Contact your local code enforcement office for specific penalty information.
ADU Rules
ADUs are NOT PERMITTED in Boulder City R1 single-family zones. Boulder City has opted for maximum restriction under state law. No detached ADUs or accessory dwellings allowed.
Key details: R1 Zone ADUs: NOT PERMITTED. Detached Buildings: No living/sleeping use allowed. Variance: Not available for additional dwellings. Code: Title 11 Zoning / Community Development. State Tension: NRS 278.02391 may require ADU allowance.
Illegal dwelling units subject to citation and required removal.
Compared to other cities, Boulder City takes a harder line on adu rules. The enforcement and penalty structure reflects that.
Shed Rules
Sheds and accessory structures regulated under Boulder City Title 5 (Building) and Title 11 (Zoning). Permits required for structures over 200 sq ft or with utilities.
Key details: Permit Threshold: Over 200 sq ft or with utilities. Setbacks: Required per Title 11 Zoning. Residential Use: No living/sleeping use permitted. Code: Title 5 Building / Title 11 Zoning.
Oversized unpermitted structure: code enforcement notice. Setback violation: correction or removal. Historic district: COA may be required.
Garage Conversions
Garage conversions to living space are generally not permitted in Boulder City R1 zones, consistent with ADU restrictions.
Key details: Living Unit Conversion: Not permitted (ADU prohibition). Non-Dwelling Conversion: May be permitted with building permit. Code: Title 11 Zoning. Contact: Community Development 702-293-9282.
Unpermitted conversion: code enforcement, potential removal. Historic district violation: COA required. Growth allocation exceeded: permit denied.
Compared to other cities, Boulder City takes a harder line on garage conversions. The enforcement and penalty structure reflects that.
The Bottom Line
Boulder City is tougher than many cities when it comes to accessory structures. Out of the 5 rules covered here, 3 are rated strict. If you are a homeowner, renter, or business owner in Boulder City, take the time to understand these requirements before they become a problem. Most violations come with fines, and some repeat violations can escalate.
These rules come from Boulder City's publicly available municipal code. For complete penalty schedules, exemption details, and answers to common questions, see the individual ordinance pages throughout this guide.