Spanish Fork, UT Accessory Structures: ADU Rules (2026)
ADU rules in Spanish Fork, UT, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.
Key Facts
- Minimum lot size
- 6,000 square feet
- Owner occupancy
- Required: owner must occupy primary or ADU
- Permitted zones
- All residential except A-E, R-4, R-5, R-O
- Parking
- 4 off-street spaces for external ADU; 3 for internal ADU
- Annual registration
- $60/year through CitizenServe
- Impact fees
- Not required for ADUs
- Code
- SFMC §15.3.24.090(E)
Summary
Spanish Fork permits ADUs in residential zones (except A-E, R-4, R-5, R-O) with a minimum 6,000 sq ft lot. Owner-occupancy is required. Annual registration ($60) is mandatory. ADUs are not permitted as STRs.
An ADU is a self-contained dwelling that may be located within a single-family dwelling or in a permanent accessory structure. Owner Occupancy: Required. Minimum of four (4) off-street parking spaces for external ADUs. Minimum of three (3) off-street parking spaces for internal ADUs. Only one (1) ADU per single-family dwelling. Permitted in all residential zones except for A-E, R-4, R-5 and R-O. Minimum lot size: 6,000 square feet. ADUs must be registered annually with the Community Development Department through CitizenServe, with an annual fee of $60.
Full Breakdown
Spanish Fork Municipal Code Title 15.3.24.090(E) governs ADUs. An ADU is defined as 'a habitable living unit added to, created within, or detached from a primary single-family dwelling and continued on one lot.' ADUs are permitted in all residential zones except A-E, R-4, R-5, and R-O. The minimum lot size is 6,000 square feet; only one ADU is permitted per single-family lot. Owner-occupancy of either the primary or accessory dwelling is required. Parking: external ADUs require minimum 4 off-street paved spaces; internal ADUs require minimum 3 spaces. ADUs must be registered annually with Community Development through CitizenServe at $60/year. Impact fees are not required for ADUs.
Frequently Asked Questions
Can I build an ADU on my property in Spanish Fork?
What are the size limits for an accessory dwelling unit in Spanish Fork?
Sources & Official References
Other rules in Spanish Fork
How Spanish Fork compares: Easiest Cities to Build an ADU·Compare Spanish Fork to another location·View the Utah accessory structures overview
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ADU Rules in Nearby Cities
How other cities in Utah County handle adu rules.