ADU Rules in Ogden, UT (2026)
ADU rules, permit requirements, size limits, and fees for Ogden, UT. Source-cited from official municipal code.
Yes, ADUs are allowed in Ogden, UT.
Ogden, UT permits accessory dwelling units (ADUs) on residential properties. ADUs — also called granny flats, in-law units, backyard cottages, or secondary suites — are secondary housing units on a single-family or multifamily lot. State and local law governs the approval process. In Ogden, the local building department handles ADU permit applications. Below you will find the current size limits, setbacks, fees, and timeline for building an ADU in Ogden.
ADU Size Limits
ADU Size Limits in Ogden: Detached ADU: up to 800 sq ft (max height: 35 feet). Attached ADU: size varies by zoning — see official source. A detached accessory dwelling unit shall not be less than three hundred (300) square feet or more than eight hundred (800) square feet in size. Detached units shall not occupy more than twenty five percent (25%) of the rear yard area of the lot.
| Type | Max Size | Max Height |
|---|---|---|
| Detached ADU | 800 sq ft · Verified June 1, 2026 · Source | 35 feet · Verified June 1, 2026 · Source |
| Attached ADU | See official source | See official source |
Permit Fees
ADU Permit Fees in Ogden: Plan check fee: Varies. Building permit fee: Varies. Impact fees: None. School fees: None or N/A. Total estimated permit cost: Varies.
| Fee Type | Amount |
|---|---|
| Plan Check | $150–$700 |
| Building Permit | Based on construction value — typically $400–$2,000 |
| Impact Fees | Varies — Ogden charges utility connection fees |
| School Fees | None |
| Total Estimate | See official source |
Permit Timeline
Ogden ADU Permit Timeline: Permit timeline has not been confirmed — contact the department for current processing times. Apply through the local building department online permit portal. Contact them through their official website for current contact information.
Setback Requirements
ADU Setback Requirements in Ogden: Front setback: follows zone standard. Side setback: no minimum. Rear setback: no minimum.
Parking Requirements
Parking Requirements: single-family dwelling with an accessory dwelling unit shall have in existence the required two (2) off street parking spaces; no additional off street parking in the front or side yard for the ADU is to be provided
Restrictions & Requirements
- ADU must be on same lot as primary residence
- Internal ADUs permitted by-right per Utah SB 174 — no CUP required
- Detached ADUs require building permit
- ADU cannot be sold separately from the primary lot
How Many ADUs Are Allowed?
Number of ADUs Allowed in Ogden: Single-family lots: No more than one (1) accessory dwelling unit shall be allowed for a lot or parcel which also contains the single-family dwelling.. Multifamily properties: ADUs shall not be allowed on lots or units which are part of a PRUD, apartment building, group dwelling or a condominium project.. An accessory dwelling unit (ADU) shall be allowed only on parcels containing a single-family dwelling. No more than one (1) accessory dwelling unit shall be allowed for a lot or parcel which also contains the single-family dwelling. ADUs shall not be allowed on lots or units which are part of a PRUD, apartment building, group dwelling or a condominium project.
- Single-Family Lots
- No more than one (1) accessory dwelling unit shall be allowed for a lot or parcel which also contains the single-family dwelling. · Verified July 14, 2026 · Source
- Multifamily Properties
- ADUs shall not be allowed on lots or units which are part of a PRUD, apartment building, group dwelling or a condominium project. · Verified July 14, 2026 · Source
Statewide Preemption
ADU Preemption
Utah state law preempts local ADU rules — local governments cannot impose stricter standards.
View Utah preemption detailsFrequently Asked Questions
Can I build an ADU in Ogden?
Yes. Ogden, UT allows accessory dwelling units. On a single-family lot you can build No more than one (1) accessory dwelling unit shall be allowed for a lot or parcel which also contains the single-family dwelling..
How big can an ADU be in Ogden?
The maximum size for a detached ADU in Ogden is 800 square feet.
How long does it take to get an ADU permit in Ogden?
The typical ADU permit timeline in Ogden is Not specified in Ogden City Code §15-13-39; permit processing time not codified in ordinance. Total estimated permit fees are Total ADU project cost not codified; all-in construction and permit cost unknown — fee schedule maintained externally by Ogden Building Services Division.
Do I need extra parking for an ADU in Ogden?
Ogden parking rules for ADUs: single-family dwelling with an accessory dwelling unit shall have in existence the required two (2) off street parking spaces; no additional off street parking in the front or side yard for the ADU is to be provided
Do I have to live on-site to have an ADU in Ogden?
Owner-occupancy requirement in Ogden: Owner-occupancy required: property owner must occupy either the primary or accessory dwelling as the property owner's permanent and principal residence in order to qualify for an ADU.
Source: Ogden City Code Chapter 29 — Zoning; Utah SB 174 (2021). Last verified April 6, 2026. View source