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Accessory Dwelling Unit (ADU) Permit in South Salt Lake, Utah

Required for construction or establishment of an Internal or External Accessory Dwelling Unit in South Salt Lake, per Municipal Code § 17.04.030.B (approval chain, unit caps, owner-occupancy, Short-Term Rental ban) and § 17.07.060.I-J (lot/size/height/parking development standards). § 17.04.030.B was amended by Ordinance No. 2026-12 to move its numeric development standards into § 17.07 rather than stating them itself — confirmed live 2026-07-23, with the underlying figures unchanged. Requires a Predevelopment Application, evidence of owner-occupancy, a Building Permit application, and (if the ADU will be rented) a Rental Business License, per the city's official ADU Handbook.

Verified 2026-07-23 · Source

When you need this permit

  • Parcel/lot minimum 6,000 sq ft with minimum 50 feet of frontage
  • Maximum of one Internal ADU and one External ADU per parcel/lot
  • External ADU capped at the lesser of 50% of the Primary Dwelling's square footage (excluding garage) or 1,000 sq ft, maximum 2 bedrooms; Internal ADU has no size/bedroom cap
  • Owner-occupancy of the Primary Dwelling or the ADU required (limited exceptions for multi-family-zoned lots, active military service, or owner hospitalization/assisted living)
  • Neither unit may be used as a Short-Term Rental (lease terms under 30 days prohibited)
  • One on-site parking space per ADU required, in addition to existing required parking
  • Predevelopment Application, evidence of owner-occupancy, Building Permit application, and (if rented) Rental Business License application, per Municipal Code § 17.04.030.B.5
  • ADU may not be constructed within a mobile home, portable container, trailer, carport, canopy structure, or similar structure

Required documents

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Fee schedule

Predevelopment Review FeeSouth Salt Lake Consolidated Fee Schedule § 3.11.040.D (Planning and Zoning Fees): 'Predevelopment review ... $50.00.' Confirmed as the applicable fee referenced by the official ADU Handbook's 'What fees do I have to pay?' FAQ, which states the Predevelopment Application Fee, applicable Building Permit fee, and Business License Fee all apply, plus any applicable impact fees and utility connection fees.
$50.00
Building Permit Fee (Building Fee + Plan Check Fee + State Surcharge Fee)South Salt Lake Consolidated Fee Schedule § 3.11.040.A, confirmed applicable to ADUs per the official ADU Handbook.
Same valuation-based ICCBVD formula as the standard Residential Building Permit: B = local multiplier x Gross ICCBVD Valuation; P = B x 0.65; Y = B x 0.01

Review timeline

Plan reviewSouth Salt Lake’s published plan-review target
15–15 business days

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Inspection process

  1. 1

    Scheduled Building Inspection

    Standard building inspection process applies once the Building Permit is issued; scheduled by calling (801) 483-6032.

See the full South Salt Lake inspection guide — scheduling & re-inspection fees →

Tips

  • The ADU Predevelopment Application must be completed and approved before the Building Permit application for the ADU itself, per the city's official ADU Handbook.
  • Impact fees and utility connection fees apply to ADUs in addition to the Predevelopment and Building Permit fees, per the official ADU Handbook FAQ.
  • A Rental Business License is only required if the ADU (or the Primary Dwelling, if the ADU occupant is the owner) is actually rented out — owner-occupied, non-rented ADUs do not need one. Owner-builder
  • Short-Term Rental use (lease terms under 30 days) is prohibited for both the Primary Dwelling and the ADU on a lot with an ADU.

Frequently asked questions

South Salt Lake requires an accessory dwelling unit (adu) permit for: Parcel/lot minimum 6,000 sq ft with minimum 50 feet of frontage; Maximum of one Internal ADU and one External ADU per parcel/lot; External ADU capped at the lesser of 50% of the Primary Dwelling's square footage (excluding garage) or 1,000 sq ft, maximum 2 bedrooms; Internal ADU has no size/bedroom cap; Owner-occupancy of the Primary Dwelling or the ADU required (limited exceptions for multi-family-zoned lots, active military service, or owner hospitalization/assisted living); Neither unit may be used as a Short-Term Rental (lease terms under 30 days prohibited); One on-site parking space per ADU required, in addition to existing required parking; Predevelopment Application, evidence of owner-occupancy, Building Permit application, and (if rented) Rental Business License application, per Municipal Code § 17.04.030.B.5; ADU may not be constructed within a mobile home, portable container, trailer, carport, canopy structure, or similar structure. If your project isn't listed, confirm with South Salt Lake Community Development Department, Building Permits Division at (801) 483-6063, ext. 2 before starting work.

In South Salt Lake, the published Predevelopment Review Fee is: $50.00. Additional published fees: Building Permit Fee (Building Fee + Plan Check Fee + State Surcharge Fee) — Same valuation-based ICCBVD formula as the standard Residential Building Permit: B = local multiplier x Gross ICCBVD Valuation; P = B x 0.65; Y = B x 0.01. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

South Salt Lake's published plan-review target for an accessory dwelling unit (adu) permit is 15–15 business days.

You'll need: ADU Predevelopment Application; Evidence of Owner Occupancy; Building Permit Application. Depending on your project, South Salt Lake may also ask for: Rental Business License Application. See the required-documents checklist on this page for details on each.

South Salt Lake requires 1 inspection(s) for an accessory dwelling unit (adu) permit, in order: Scheduled Building Inspection. Schedule each through South Salt Lake Community Development Department, Building Permits Division ((801) 483-6063, ext. 2).

Apply through South Salt Lake Community Development Department, Building Permits Division at 220 E Morris Avenue, Suite 150, South Salt Lake, UT 84115. Phone: (801) 483-6063, ext. 2, email: permits@sslc.gov, per the official Building Permit Application PDF (revised 05/01/26, sslc.gov/DocumentCenter/View/246); the Building Permits page (sslc.gov/215/Building-Permits) also offers a web contact form. Planning Division: planning@sslc.gov, confirmed via the official ADU Handbook (checked 2026-07-23).. Office hours: Mon–Fri 8:00 AM – 5:00 PM, per South Salt Lake's official Building Department contact listing. Inspection scheduling by phone at (801) 483-6032; Right-of-Way, Demolition, and Sign Permits handled via ext. 3.. Official information: https://sslc.gov/215/Building-Permits.

Per the city's official ADU Handbook, you must pay the Predevelopment Application Fee ($50.00, per the Consolidated Fee Schedule), the applicable Building Permit fee (valuation-based, per the ICCBVD formula), and — if the ADU will be rented — a Business License Fee. Applicable impact fees and utility connection fees also apply.

Per Municipal Code § 17.04.030.B.3 and the official ADU Handbook, a maximum of one Internal ADU and one External ADU is permitted per parcel/lot.

Other permits in South Salt Lake

Residential Building Permit (New Construction / Addition / Remodel)Fence PermitRe-Roof PermitDemolition PermitSign PermitElectrical / Mechanical / Plumbing Trade Permit (Residential Replacements & Upgrades)Commercial Building PermitCommercial Tenant Improvement / Tenant Finish PermitEV Charger / EVSE PermitSolar Panel / Photovoltaic (PV) Installation PermitFire Sprinkler / Fire Alarm System PermitChange of Use / Certificate of Occupancy Review

Accessory Dwelling Unit (ADU) Permit in other cities

South Ogden, UtahSyracuse, UtahBroomfield, ColoradoCentennial, ColoradoHamilton, MontanaHayden, IdahoLivingston, MontanaLoveland, Colorado

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