Skip to main content
PermitBase

Accessory Dwelling Unit (ADU) Permit in Logan, Utah

Required for construction of an accessory dwelling unit on a residential property in Logan. The building permit fee is valuation-based; zoning eligibility must be confirmed with Logan Community Development before applying.

Verified 2026-07-01 · Source

When you need this permit

  • Property must be in an eligible residential zone — verify with Logan Community Development
  • ADU must meet minimum and maximum size requirements per Logan zoning code
  • Must comply with all setback requirements for the zone

Required documents

Check off what you have — your progress is saved on this device.

Not ready yet — 0 of 4 required documents checked.

This checker covers one permit. A full project usually triggers several — our paid checklist will assemble all of them, from $29 →

Fee schedule

Building Permit (valuation-based)Assessed on project valuation per Logan City's published Building Permit Fee Resolution No. 20-09 (cited fee table). An ADU is new residential construction and is fee-assessed identically to the Residential Building Permit schedule — no separate ADU-specific fee line exists.
Per Logan City fee table by project valuation — see Residential Building Permit fees above
Residential Plan Check FeeLogan City Building Permit Fees — Resolution No. 20-09
0.1% of construction valuation; minimum $15.00
Electrical PermitLogan City Building Permit Fees — Resolution No. 20-09
8% of the Building Permit Fee
Plumbing PermitLogan City Building Permit Fees — Resolution No. 20-09
8% of the Building Permit Fee
Mechanical PermitLogan City Building Permit Fees — Resolution No. 20-09
8% of the Building Permit Fee
State SurchargeLogan City Building Permit Fees — Resolution No. 20-09
1% of building permit fee

Review timeline

Plan reviewTypical estimate — confirm current times with the Logan building department
~14–28 business days

How long did your Accessory Dwelling Unit (ADU) Permit permit actually take in Logan?

Anonymous — one question, no email. Answers are combined and only shown once at least 5 people have reported.

Inspection process

  1. 1

    Footings

    Before concrete pour — forms, rebar, anchor bolts

  2. 2

    Rough 4-Way

    Framing, mechanical, plumbing, and electrical rough-ins before walls closed

  3. 3

    Final

    All work complete, ready for occupancy

See the full Logan inspection guide — scheduling & re-inspection fees →

Tips

  • Confirm ADU zoning eligibility with Logan Community Development before designing or applying — (435) 716-9030.
  • ADU building permit fees are valuation-based per Resolution No. 20-09, the same as new residential construction.
  • Impact fees for new dwelling units are separate from building permit fees — see Logan's Impact Fee schedule on the fees page.
  • Utah's statewide internal-ADU law (HB82, 2021) governs baseline ADU legalization; specific zoning standards (size, parking, setbacks) remain locally administered and should be confirmed directly with Logan Community Development, as local zoning code text was not independently re-verified in this pass.

Frequently asked questions

Logan requires an accessory dwelling unit (adu) permit for: Property must be in an eligible residential zone — verify with Logan Community Development; ADU must meet minimum and maximum size requirements per Logan zoning code; Must comply with all setback requirements for the zone. If your project isn't listed, confirm with Logan City Building & Safety Division at (435) 716-9030 before starting work.

In Logan, the published Building Permit (valuation-based) is: Per Logan City fee table by project valuation — see Residential Building Permit fees above. Additional published fees: Residential Plan Check Fee — 0.1% of construction valuation; minimum $15.00; Electrical Permit — 8% of the Building Permit Fee; Plumbing Permit — 8% of the Building Permit Fee; Mechanical Permit — 8% of the Building Permit Fee; State Surcharge — 1% of building permit fee. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Plan review for an accessory dwelling unit (adu) permit in Logan typically runs 14–28 business days. This is an estimate, not a published figure — confirm current review times with Logan City Building & Safety Division at (435) 716-9030.

You'll need: Application for Residential Permit; Construction Plans; Site Plan; Energy Compliance. See the required-documents checklist on this page for details on each.

Logan requires 3 inspection(s) for an accessory dwelling unit (adu) permit, in order: Footings, Rough 4-Way, Final. Schedule each through Logan City Building & Safety Division ((435) 716-9030).

Apply through Logan City Building & Safety Division at 290 N 100 W, Logan, UT 84321. Phone: (435) 716-9030, email: loganplanreview@loganutah.gov. Office hours: Mon–Fri 8:00 AM – 5:00 PM. Official information: https://www.loganutah.org/government/departments/community_development/building_department/index.php.

Logan, Utah has adopted: 2024 International Building Code (IBC) — Utah Code § 15A-2-103(1)(a); effective 2026-07-01, superseded the 2021 edition. NOTE (verified 2026-07-16): Logan's own 'Current Building Codes & Engineering Design Requirements' document is dated 'Effective July 2023' / 'Updated: 07/2023' and still lists the 2021 IBC — it has not been updated for the 7/1/2026 code cycle.; 2021 International Residential Code (IRC) — Utah Code § 15A-2-103(1)(b); unchanged by the 7/1/2026 code cycle; Logan's own (stale, July 2023) codes document also lists this edition; 2024 International Mechanical Code (IMC) — Utah Code § 15A-2-103(1)(e); effective 2026-07-01, superseded the 2021 edition; 2024 International Plumbing Code (IPC) — Utah Code § 15A-2-103(1)(d); effective 2026-07-01, superseded the 2021 edition; 2024 International Fuel Gas Code (IFGC) — Utah Code § 15A-2-103(1)(f); effective 2026-07-01, superseded the 2021 edition; 2024 International Energy Conservation Code (IECC) — Utah Code § 15A-2-103(1)(h); effective 2026-07-01, superseded the 2021 edition; 2023 National Electrical Code (NEC) — Utah Code § 15A-2-103(1)(g); unchanged by the 7/1/2026 code cycle. Logan's own codes document (July 2023) lists a '2020 National Electrical Code' — this was already stale before this fix and remains so; the statewide 2023 NEC governs.; 2024 International Existing Building Code (IEBC) — Utah Code § 15A-2-103(1)(i); effective 2026-07-01, superseded the 2021 edition. NOTE: no IEBC line previously existed in this file's codesAdopted entry or in Logan's own codes document; added here directly from the statute for completeness.; 2024 International Swimming Pool and Spa Code (ISPSC), residential provisions — Utah Code § 15A-2-103(1)(n); effective 2026-07-01, superseded the 2021 edition. NOTE: no ISPSC line previously existed in this file's codesAdopted entry or in Logan's own codes document; added here directly from the statute for completeness.; 2017 ICC A117.1 (Accessibility) — Logan City 'Current Building Codes & Engineering Design Requirements' (dated Effective July 2023 / Updated 07/2023); NOTE (verified 2026-07-16): The 2024 editions of IBC, IPC, IMC, IFGC, IECC, IEBC, and ISPSC took effect 2026-07-01 per Utah Code § 15A-2-103, superseding the 2021 editions that governed through 2026-06-30. The 2021 IRC and 2023 NEC were NOT changed by this cycle. Confirmed directly against the version of § 15A-2-103 effective 7/1/2026 (superseded 1/1/2027) at le.utah.gov. Logan's own codes document (loganutah.org/departments/comdev/building/Current%20Building%20Codes%202023.pdf) was fetched live and confirmed stale — dated 'Effective July 2023' / 'Updated: 07/2023', listing 2021 IBC/IRC/IMC/IPC/IFGC/IECC and a '2020 National Electrical Code' (itself outdated even relative to the pre-7/1/2026 baseline); it has not been revised for either the 2023 NEC correction or the 7/1/2026 code cycle.. Local amendments apply — see the Logan overview page for the full list.

ADUs may be permitted in certain residential zones in Logan. Confirm zoning eligibility with Logan Community Development at (435) 716-9030 before applying. Building permit fees are valuation-based per Logan City Building Permit Fees (Resolution No. 20-09).

Sources & verification

Verified against official sources. Last reviewed 2026-07-01.

Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Logan building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

Other permits in Logan

Residential Building PermitElectrical PermitPlumbing PermitMechanical / HVAC PermitRoofing PermitSolar Panel PermitWater Heater PermitDeck PermitBasement Finish PermitSiding & Window Replacement PermitCommercial Building PermitCommercial Tenant Improvement / Tenant Finish PermitSign PermitEV Charger / EVSE PermitFire Sprinkler System PermitFire Alarm System PermitChange of Use (Business License Amendment / Commercial Certificate of Occupancy)

Accessory Dwelling Unit (ADU) Permit in other cities

Bountiful, UtahDraper, UtahEagle Mountain, UtahKaysville, UtahLayton, UtahLehi, UtahNorth Salt Lake, UtahOgden, Utah

Compare accessory dwelling unit (adu) permit fees across Utah →

Look up this fee in a different city →

Embed this data card →

Related guides

ADU / In-Law Suite

Now live

Build your Logan project checklist

Describe your project once and get every permit, document, and fee it triggers in Logan — in one checklist. Sign up and pay once to generate it, or go unlimited with Pro.

Get started →