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UPUtah Property Playbook

Investment tools

Could Your Property Work for a Detached ADU?

Enter your address and we'll check Utah public records — parcel data, lot size, and municipality — against Utah's new detached-ADU law, so you know what's worth investigating further.

What this tool does: we look up your property in Utah’s public parcel and municipal-boundary records and compare what we find against the state’s detached-ADU statute. What it doesn’t do: issue a permit approval, a zoning determination, or a legal opinion, or estimate construction cost, financing, or rental income. Those all still require verification with your city or county.

We only look up public parcel, lot-size, and municipal-boundary records for the address you enter — never your name, phone number, email, or mailing address, and nothing is saved unless you choose to share it below.

We only look up public parcel, lot, and municipal-boundary records for this address — never owner name, phone, email, or mailing address.

The law behind this tool

What Utah’s detached-ADU law actually requires.

  • A specified municipality — a defined set of incorporated cities, not every city and never unincorporated county land — must allow a detached ADU on a lot of 11,000 square feet or larger that already has a single-family dwelling, if that dwelling is a permitted use.
  • Smaller lots aren’t automatically excluded — the law doesn’t stop a municipality from allowing detached ADUs on smaller lots too; that’s a local decision.
  • Effective 2026-10-01 — the law is enacted (Chapter 166, 2026 General Session) but not yet in force before that date; this tool’s wording reflects whichever is true when you check.

This is general information about a Utah state law, not legal advice about your specific property. Zoning, permitted-use status, and every other local requirement still need verification with your municipality or county.

Author: Todd McClean, Realtor® | Real Estate Investment Strategist, Mountainland Realty, Inc.. Reviewed August 13, 2026. This tool provides general real estate information and is not legal, tax, accounting, lending, securities, commodities, or financial-planning advice.

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Questions

Frequently asked questions

Can I build a detached ADU on my property in Utah?
It depends on your lot, your municipality, and local zoning — this tool can't answer that directly. It can tell you what Utah public records show about your lot size, municipality, and residential status, and what Utah's new statewide law requires, so you know what's worth investigating further with your city or county.
What is Utah's 11,000 sq. ft. detached ADU law?
Utah Code Sec. 10-21-304, "Detached accessory dwelling units" requires certain Utah municipalities to allow a detached accessory dwelling unit on lots of 11,000 square feet or larger that already have a single-family dwelling, when that dwelling is a permitted use. It doesn't prohibit smaller-lot ADUs — municipalities remain free to allow those too. The law is enacted and is scheduled to take effect 2026-10-01.
Does the 11,000 sq. ft. threshold apply everywhere in Utah?
No. It applies only to "specified municipalities" — a defined set of incorporated cities, not counties or unincorporated land. If your property is in unincorporated county land, or in a municipality that doesn't clearly meet the statute's population thresholds, this state-law rule doesn't apply and local rules need to be checked directly.
Does meeting the lot-size threshold mean my ADU is approved?
No. Lot size is only one part of the requirement. Zoning, permitted-use status, setbacks, building separation, height, parking, utilities, and your municipality's own permit process all still need local verification — this tool identifies what's worth investigating, not a permit or approval.
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Optional next step

Want help verifying the remaining requirements?

Your results above are complete on their own — this is only for if you’d like help working through the local zoning, permitted-use, and permit questions this tool can’t answer.

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