State law applies now
Cities covered by SB 284 must allow qualifying detached ADUs as of October 1, 2026.
West Valley City, Utah
Detached ADUs in West Valley City.
West Valley City is covered by Utah's SB 284, so a qualifying lot with a single-family home can host a detached ADU. We did not find an adopted West Valley City ordinance, so check the city's current rules before you design.
Confirm current status with the city
What we confirmed for West Valley City
Source: Utah Code 10-21-304, enacted by S.B. 284 (2026 General Session).
- State requirement
- Allow a detached ADU on lots of 11,000 sq ft or more with a single-family home
- Permits
- No conditional use permit in a primarily residential zone
- Parking
- 1 space under 650 sq ft, 2 at 650 sq ft or more, at most
- Conversions
- A process to convert legally built accessory structures
- City rules
- Size, height, setbacks, owner occupancy and 90-day rental rules may apply
- Status
- No adopted ordinance confirmed
Not confirmed: West Valley City's adopted size, height, setback and parking standards, and its lot-size rule. Contact the city for its current ordinance.
What it means for you
What changes for West Valley City homeowners.
Large, varied housing stock
West Valley City has many lot sizes and neighborhoods, so a lot-by-lot check matters.
We will check for you
Send us your address and we will look at the lot size, the city rules and the delivery route.
Plans that fit
Compact floor plans for a West Valley City backyard.
Small plans are easier to fit inside setbacks and cap parking at one space under 650 square feet. Open any plan for photos and the floor plan.
Final fit depends on your lot, utilities, the delivery route and the city's current standards. We confirm all of it in a lot review.
Budget the site work before you fall for a plan.
The home is only part of what a detached ADU costs. Sewer, water and power connections, trenching, the foundation and the finish work that joins the modules add up, and they depend on how far your lot is from the utilities. Taylorsville city staff told their council that utility connections alone could run 50 to 70 percent of the cost of a detached unit. We price the site and the utilities line by line in a lot review, before you commit to a plan.
How to plan the full budgetHow it works here
From your lot to move-in.
- Lot review. We check lot size, setbacks, utilities and the delivery route to your backyard.
- Choose a plan and finishes. Pick a floor plan and one of four finish series.
- City review. We help you prepare the plans and site information West Valley City will want for approval and the building permit.
- Foundation and utilities. Site work happens on your lot while the home is built in the factory.
- Delivery and set. The home arrives by truck and is set by crane, then finished, connected and walked through with you.
Questions
West Valley City ADU questions.
Does SB 284 apply to West Valley City?
Yes. West Valley City is covered by the state mandate, which requires a covered city to allow a detached ADU on a lot of 11,000 square feet or more that has a single-family home, as a permitted use. Cities can still set size, height, setback, owner-occupancy and rental rules within the limits of the law. Read the SB 284 guide.
How much parking does a detached ADU need?
A city cannot require more than one on-site space for a detached ADU under 650 square feet, or more than two for a unit of 650 square feet or larger.
Can I rent it out?
The state allows a city to require rentals of at least 90 consecutive days and to require the owner to live on the property. Check how West Valley City applies those rules to your lot.
What if my lot is smaller than 11,000 square feet?
The state mandate does not reach it, but a city may choose to allow smaller lots. Ask West Valley City Planning what applies to your parcel.
Does Stoneward work in West Valley City?
Yes. Stoneward is based in American Fork and serves Salt Lake County and the rest of the Wasatch Front. We run a lot review first and tell you plainly if a detached ADU does not fit.
General information, not legal advice. Cities can amend their ordinances, so confirm current rules with West Valley City before you design or buy.
Own a lot in West Valley City?
Send us your address. We will check the lot against West Valley City's rules and tell you honestly whether a detached ADU fits.