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Accessory Dwelling Unit (ADU) Permit in Spanish Fork, Utah

Required for construction of an accessory dwelling unit in Spanish Fork. Grounded on the city's dedicated ADU page (Community Development/Planning): owner-occupancy required, one ADU per single-family dwelling, minimum 6,000 sq ft lot, permitted in all residential zones except A-E/R-4/R-5/R-O, no separate electric meter or impact fee required, and annual $60 registration required via CitizenServe. CitizenServe has an ADU permit type.

Verified 2026-07-01 · Source

When you need this permit

  • New ADU construction (attached or detached)
  • Conversion of existing space to an ADU
  • Owner occupancy of the primary dwelling required
  • Only one ADU per single-family dwelling
  • Minimum lot size 6,000 square feet
  • Permitted in all residential zones except A-E, R-4, R-5, and R-O
  • Off-street parking: minimum 4 spaces for external ADUs, 3 spaces for internal ADUs
  • Annual registration with Community Development ($60 fee) required after construction
  • Full requirements: Spanish Fork Municipal Code Title 15 § 15.3.24.090(E)

Required documents

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Fee schedule

ADU Building PermitGrounded: Spanish Fork Building Fees page, FY2026: 'Building Permit — As set by 2021 IRC.' ADUs follow the standard building permit valuation table (new construction).
Valuation-based per 2021 IRC Appendix AL — assessed on project valuation per Spanish Fork's building permit fee schedule
ADU Annual RegistrationGrounded: Spanish Fork Accessory Dwelling Units page (Community Development/Planning), verbatim: 'ADUs in Spanish Fork must be registered annually. Visit CitizenServe to submit an application. The annual registration fee is $60.' Impact fees are explicitly NOT required for ADUs per the same page's requirements table.
$60 per year
Plan Check — ResidentialSpanish Fork Building Fees page, FY2026 (effective 07/01/2025–06/30/2026).
$499 per plan; $129 per hour beyond 3 hours
Building Re-inspectionSpanish Fork Building Fees page, FY2026 (effective 07/01/2025–06/30/2026).
$132 flat fee per trip

Review timeline

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

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

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

Inspection process

  1. 1

    Foundation / Setbacks

    Forms and rebar in place; property line setbacks verified before concrete pour.

  2. 2

    4-Way (Framing + MEP Rough-In)

    Framing, shear walls, and all roughed-in electrical, mechanical, and plumbing.

  3. 3

    Insulation

    Insulation verified per IECC requirements.

  4. 4

    Final

    All work complete — certificate of occupancy issued upon passing.

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

Tips

  • Contact Spanish Fork Community Development at (801) 804-4540 for current ADU zoning eligibility before designing.
  • ADUs are listed as a permit type in CitizenServe — select the ADU-specific application when applying.
  • ADUs must be registered annually with Community Development ($60/year) via CitizenServe — separate from the one-time building permit.
  • No separate electric meter or impact fee is required for an ADU per the city's ADU requirements table.
  • ADUs are assigned a secondary address for public safety purposes only; this address is not recognized by USPS for mail delivery.
  • Minimum lot size is 6,000 sq ft; ADUs are not permitted in A-E, R-4, R-5, or R-O zones.

Frequently asked questions

Spanish Fork requires an accessory dwelling unit (adu) permit for: New ADU construction (attached or detached); Conversion of existing space to an ADU; Owner occupancy of the primary dwelling required; Only one ADU per single-family dwelling; Minimum lot size 6,000 square feet; Permitted in all residential zones except A-E, R-4, R-5, and R-O; Off-street parking: minimum 4 spaces for external ADUs, 3 spaces for internal ADUs; Annual registration with Community Development ($60 fee) required after construction; Full requirements: Spanish Fork Municipal Code Title 15 § 15.3.24.090(E). If your project isn't listed, confirm with Spanish Fork City Building Department at (801) 804-4540 before starting work.

ADUs must be registered annually with Community Development for $60/year via CitizenServe, in addition to the one-time valuation-based building permit fee for construction. No separate electric meter or impact fee is required.

Plan review for an accessory dwelling unit (adu) permit in Spanish Fork typically runs 14–28 business days. This is an estimate, not a published figure — confirm current review times with Spanish Fork City Building Department at (801) 804-4540.

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

Spanish Fork requires 4 inspection(s) for an accessory dwelling unit (adu) permit, in order: Foundation / Setbacks, 4-Way (Framing + MEP Rough-In), Insulation, Final. Schedule each through Spanish Fork City Building Department ((801) 804-4540).

Apply through Spanish Fork City Building Department at 40 S Main St, Room 120, Spanish Fork, UT 84660. Phone: (801) 804-4540, email: twilliams@spanishfork.gov. Office hours: Mon–Fri 8:00 AM – 5:00 PM. Official information: https://www.spanishfork.gov/departments/community_development/building/index.php.

Spanish Fork, Utah has adopted: 2024 International Building Code (IBC) with Utah Amendments — Utah Code § 15A-2-103(1)(a); CURRENT as of 7/1/2026 (confirmed by direct fetch of the live statute 2026-07-16). Supersedes the 2021 IBC, which governed through 6/30/2026. NOTE (2026-07-16 city-page lag): Spanish Fork's own Design Criteria page (spanishfork.gov/departments/community_development/building/design_criteria.php), live-checked via browser 2026-07-16, still lists 'IBC 2021 Int'l Bldg Code w/UT Amendments' verbatim — the city's page has NOT been updated to reflect the 7/1/2026 statewide flip. The statute controls regardless of the city page's lag.; 2021 International Residential Code (IRC) — Utah Code § 15A-2-103(1)(b); UNCHANGED by the 7/1/2026 code cycle. Matches Spanish Fork's Design Criteria page (live-checked 2026-07-16: 'IRC 2021 Int'l Residential Code').; Appendix AQ of the 2021 International Residential Code — Utah Code § 15A-2-103(1)(c) (confirmed by direct fetch of the live statute 2026-07-16; not independently listed on Spanish Fork's Design Criteria page).; 2024 International Plumbing Code (IPC) — Utah Code § 15A-2-103(1)(d); CURRENT as of 7/1/2026 (confirmed by direct statute fetch 2026-07-16). Supersedes the 2021 IPC, which governed through 6/30/2026. NOTE (2026-07-16 city-page lag): Spanish Fork's Design Criteria page still lists 'IPC 2021 Plumbing' — the statute controls.; 2024 International Mechanical Code (IMC) — Utah Code § 15A-2-103(1)(e); CURRENT as of 7/1/2026 (confirmed by direct statute fetch 2026-07-16). Supersedes the 2021 IMC, which governed through 6/30/2026. NOTE (2026-07-16 city-page lag): Spanish Fork's Design Criteria page still lists 'IMC 2021 Mechanical' — the statute controls.; 2024 International Fuel Gas Code (IFGC) — Utah Code § 15A-2-103(1)(f); CURRENT as of 7/1/2026 (confirmed by direct statute fetch 2026-07-16). Supersedes the 2021 IFGC, which governed through 6/30/2026. NOTE (2026-07-16 city-page lag): Spanish Fork's Design Criteria page still lists 'IFGC 2021 Fuel Gas Code' — the statute controls.; 2023 National Electrical Code (NEC) — Utah Code § 15A-2-103(1)(g); UNCHANGED by the 7/1/2026 code cycle. Matches Spanish Fork's Design Criteria page (live-checked 2026-07-16: 'NEC 2023 Commercial Electrical').; 2024 International Energy Conservation Code (IECC) — Utah Code § 15A-2-103(1)(h); CURRENT as of 7/1/2026 (confirmed by direct statute fetch 2026-07-16). ONE statewide edition — no residential/commercial split. Supersedes the 2021 IECC, which governed through 6/30/2026. NOTE (2026-07-16 city-page lag): Spanish Fork's Design Criteria page still lists 'IECC 2021 Energy' — the statute controls.; 2021 International Fire Code (IFC) — local citation only, per Spanish Fork's Design Criteria page (live-checked 2026-07-16: 'IFC 2021 National Fire'). CORRECTION (2026-07-16): a prior version of this file cited Utah Code § 15A-2-103(1)(c) for this entry — that is WRONG; §15A-2-103 does NOT adopt the IFC at all (its statute text has no IFC subsection; subsection (c) actually adopts Appendix AQ of the 2021 IRC, listed separately above). The IFC edition is left unchanged here since §15A-2-103 provides no statewide IFC edition to supersede it.; ICC/ANSI A117.1-2009 (ADA/Accessibility) — Spanish Fork Design Criteria page (live-checked 2026-07-16, unchanged).; NOTE (2026-07-16 corpus-staleness fix): This file previously stated the 2021 editions of IBC/IPC/IMC/IFGC/IECC as current with only a forward-looking mention of the 7/1/2026 flip; that effective date has now passed. A live browser fetch of Spanish Fork's Design Criteria page on 2026-07-16 confirms the city itself has NOT updated its page — it still displays 2021 for IBC/IECC/IFC/IMC/IPC/IFGC verbatim (NEC correctly remains 2023). Because Utah is a statewide-mandatory-code state under Utah Code § 15A-2-103 (per Utah Code § 15A-1-204, binding the state and every political subdivision), the statute controls regardless of the city page's lag, so the entries above state the 2024 editions as current for IBC/IPC/IMC/IFGC/IECC. IRC (2021) and NEC (2023) are correctly unchanged on both the statute and the (otherwise stale) city page.. Local amendments apply — see the Spanish Fork overview page for the full list.

Spanish Fork allows ADUs on lots of at least 6,000 sq ft in most residential zones (except A-E, R-4, R-5, R-O), subject to owner-occupancy of the primary dwelling and one ADU per dwelling. Contact Community Development at (801) 804-4540 or see the city's Accessory Dwelling Units page to confirm zoning eligibility.

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 Spanish Fork building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

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