Accessory Dwelling Unit (ADU) in North Salt Lake, Utah

North Salt Lake requires an accessory dwelling unit (adu) permit for: Maximum one ADU per owner-occupied single-family dwelling, or in a detached accessory structure associated with a single-family dwelling; Working smoke detectors required in bedrooms and hallways; GFCI outlets required in kitchens and bathrooms; Earthquake strapping required for water heaters; Compliant bedroom egress windows; Handrails required for basement apartments; Additional off-street parking required where applicable. If your project isn't listed, confirm with North Salt Lake City Building Department (Community Development Department) at (801) 335-8720 before starting work.

The Land Use Permit required for all ADUs is free. If new construction is involved (e.g., a detached ADU), standard valuation-based building permit fees apply to that construction. (nslcity.org/519/Accessory-Dwelling-Units)

North Salt Lake does not publish a plan-review timeline for this permit. Contact North Salt Lake City Building Department (Community Development Department) at (801) 335-8720 for current turnaround.

You'll need: Land Use Permit. Depending on your project, North Salt Lake may also ask for: Building Permit (CityInspect). See the required-documents checklist on this page for details on each.

North Salt Lake requires 1 inspection(s) for an accessory dwelling unit (adu) permit, in order: Final (if construction involved). Schedule each through North Salt Lake City Building Department (Community Development Department) ((801) 335-8720).

Apply through North Salt Lake City Building Department (Community Development Department) at 10 E Center Street, North Salt Lake, UT 84054. Phone: (801) 335-8720, email: permits@nslcity.org. Office hours: Monday–Thursday, 7:00 AM – 5:30 PM (closed Fridays); inspections available Monday–Thursday only, AM (8-12) or PM (1-4). Official information: https://www.nslcity.org/97/Building.

North Salt Lake, Utah has adopted: 2024 International Building Code (IBC), including Appendices C and J — CURRENT statewide as of 7/1/2026 per Utah Code § 15A-2-103(1)(a); North Salt Lake's Adopted Model Codes page (nslcity.org/113/Adopted-Model-Codes) was live-checked 2026-07-16 and STILL lists '2021 International Building Code' — city page lags the statute; 2021 International Residential Code (IRC) — REMAINS CURRENT; Utah Code § 15A-2-103(1)(b) did not change this edition in the 7/1/2026 amendment. Adopted Model Codes page (live-checked 2026-07-16) correctly lists '2021 International Residential Code'; Appendix AQ of the 2021 IRC — statewide per Utah Code § 15A-2-103(1)(c); not separately itemized on North Salt Lake's Adopted Model Codes page, added here per statute; 2024 International Mechanical Code (IMC) — CURRENT statewide as of 7/1/2026 per Utah Code § 15A-2-103(1)(e); Adopted Model Codes page live-checked 2026-07-16 STILL lists '2021 International Mechanical Code' — city page lags the statute; 2024 International Plumbing Code (IPC) — CURRENT statewide as of 7/1/2026 per Utah Code § 15A-2-103(1)(d); Adopted Model Codes page live-checked 2026-07-16 STILL lists '2021 International Plumbing Code' — city page lags the statute; 2024 International Fuel Gas Code (IFGC) — CURRENT statewide as of 7/1/2026 per Utah Code § 15A-2-103(1)(f); Adopted Model Codes page live-checked 2026-07-16 STILL lists '2021 International Fuel Gas Code' — city page lags the statute; 2024 International Energy Conservation Code (IECC), single unsplit statewide edition — CURRENT statewide as of 7/1/2026 per Utah Code § 15A-2-103(1)(h); Adopted Model Codes page live-checked 2026-07-16 STILL lists '2021 Energy Conservation Code' — city page lags the statute; 2021 International Fire Code (IFC) — Adopted Model Codes page (live-checked 2026-07-16, still lists 2021). NOTE: the IFC is NOT among the codes adopted by Utah Code § 15A-2-103 (which governs Title 15A Chapter 2, State Construction Code) — Utah's Fire Code is separately adopted under Title 15A Chapter 5, State Fire Code Act; left as published by the City, no statutory edition change applies via § 15A-2-103; 2021 International Property Maintenance Code — Adopted Model Codes page (live-checked 2026-07-16, still lists 2021). NOTE: the IPMC is NOT among the codes adopted by Utah Code § 15A-2-103 (property-maintenance code, not a construction code), so no statewide edition change applies here — left as published by the City; 2024 International Existing Building Code (IEBC) — statewide per Utah Code § 15A-2-103(1)(i); not listed at all on North Salt Lake's Adopted Model Codes page (live-checked 2026-07-16), added here per statute since the City's own materials omit it entirely; Residential provisions of the 2024 International Swimming Pool and Spa Code (ISPSC) — statewide per Utah Code § 15A-2-103(1)(n); not listed at all on North Salt Lake's Adopted Model Codes page (live-checked 2026-07-16), added here per statute since the City's own materials omit it entirely; 2020 National Electrical Code (NEC) as published by North Salt Lake — Adopted Model Codes page (live-checked 2026-07-16, still lists '2020 National Electrical Code'). This is INCORRECT and out of date independent of the 7/1/2026 transition: Utah Code § 15A-2-103(1)(g) requires the 2023 NEC statewide, and that subsection was NOT changed by the 7/1/2026 amendment (2023 NEC has been the statutory baseline since before this re-verification, matching the 2023 edition used by neighboring Davis County cities such as Kaysville). The statutorily-governing edition is 2023 NEC, not the 2020 edition North Salt Lake's own page displays — confirm with the Building Department at (801) 335-8721 before relying on the city page for NEC edition; 2017 ICC/ANSI A117.1 Standard for Accessibility — Adopted Model Codes page; not part of Utah Code § 15A-2-103's construction-code list, left unchanged; 1997 Uniform Code for the Abatement of Dangerous Buildings — Adopted Model Codes page; not part of Utah Code § 15A-2-103's construction-code list, left unchanged; Utah state amendments to adopted codes (Utah Admin. Code R156-56) — referenced directly on the Adopted Model Codes page; NOTE (2026-07-16 re-verification): The Utah Code § 15A-2-103 version effective 7/1/2026 (superseded 1/1/2027) took effect 15 days before this re-verification. IBC/IPC/IMC/IFGC/IECC/IEBC/residential ISPSC are now 2024 statewide; IRC (2021) did NOT change. North Salt Lake's Adopted Model Codes page (nslcity.org/113/Adopted-Model-Codes) was live-checked 2026-07-16 and STILL lists 2021 editions across IBC/IMC/IPC/IFGC/IECC/IFC/IPMC (confirmed via raw HTML, not an AI summary) — the city page has NOT been updated to reflect the statutory transition. Separately, the city's page also shows 2020 NEC, which was already non-compliant with the (unchanged) 2023 NEC statutory requirement before this transition. This file now states the governing statutory codes (2024/2021/2023 editions per subsection) as current per Utah's statewide-mandatory code regime (Utah Code § 15A-1-204), while preserving the City's own (lagging) page text above as historical/local-document context. The Utah Code § 15A-2-103 citation in the sources array below has been updated to the current in-force version link. Local amendments apply — see the North Salt Lake overview page for the full list.

Yes. North Salt Lake Municipal Code § 10-19-17 allows Basement Apartment, Attached, Detached, Second-Story Detached (e.g., above garage), and Tiny Home ADU configurations on single-family lots — broader than some neighboring cities that restrict ADUs to internal-only.