Can You Put an ADU on a Rental Property in Utah?

Sometimes. Many Utah cities allow an accessory dwelling unit only when the owner lives on the property, which rules out an ADU on a pure rental. Other cities allow it with conditions, and several treat internal units differently from detached ones. State ADU legislation has pushed cities toward allowing internal units, but the ordinance written for your address decides. Confirm with that city's planning department before you buy or build.

Owner-occupancy is the first question, not the last

When a homeowner asks whether they can add an ADU to a house they rent out, the answer almost always turns on one clause in the local ordinance: an owner-occupancy requirement. In cities that have one, either the main house or the accessory unit has to be the primary residence of the person who owns the parcel. If you live somewhere else and both units would be rented, that requirement is a hard stop for a permitted ADU — not a fee you can pay or a condition you can design around.

Cities that require owner occupancy usually enforce it in writing. You may be asked to record a deed restriction or covenant against the title, sign an affidavit, renew a license annually, or show a driver's license and tax documents tied to that address. Some cities also tie the permit to the owner at the time of approval, meaning a sale can require the new owner to re-establish compliance. None of that is unusual, and none of it is something a builder can waive.

It is worth knowing why the rule exists, because it tells you how flexible a city is likely to be. Owner-occupancy requirements are generally written to keep accessory units in the hands of resident homeowners — a parent in the backyard, an adult child saving for a down payment, a long-term tenant whose landlord lives twenty steps away — rather than becoming a path to converting neighborhoods into investor-owned duplexes. That is also why many families end up building one for themselves rather than asking whether it can pay for itself as a rental.

What state law changed, and what it did not

Utah's legislature has taken up accessory dwelling units more than once in recent sessions, and the general direction has been to push cities toward permitting internal ADUs — a unit carved out of the existing footprint of a single-family home, like a basement apartment with its own entrance — in most residential zones. That is real progress for homeowners who were previously told no outright.

The important nuance for a landlord is that state-level permissiveness has generally come paired with conditions cities are allowed to keep, and owner occupancy is commonly one of them. So a city can simultaneously allow internal ADUs broadly and still require that the property owner live on site. Detached units in the backyard are typically treated under local zoning rather than the state's internal-ADU framework, which means a city has even more latitude there.

Rules also move. Ordinances get rewritten after legislative sessions, and two neighboring Utah County cities can land in very different places in the same year. Anything you read in a forum thread — or in an article like this one — is background, not a determination for your address. This is one of the reasons Reddit is useful for building a question list but unreliable on local specifics; our rundown on using Reddit to research tiny homes and ADUs covers where it helps and where it misleads.

Internal, attached, and detached units get treated differently

If you own a rental and want to add living space, the type of unit matters as much as the zoning. An internal ADU reuses space you already have and shares walls, roof, and often utility connections, which keeps both cost and permitting complexity down. An attached unit — a garage conversion or a small addition with a separate entrance — sits in the middle. A detached unit in the backyard is the most independent and the most heavily reviewed: setbacks, lot coverage, height limits, separation from the main house, and sometimes an added parking stall all apply.

On a non-owner-occupied lot, cities often scrutinize the detached option hardest, because that is where a second full dwelling quietly becomes a second household on a single-family street. Parking is frequently the sticking point. If the ordinance wants an off-street stall per unit and the lot cannot deliver it without paving the side yard, the project can stall on geometry rather than policy.

Some owners look at a home on a chassis as a workaround. It usually is not one for a rental lot. A unit on wheels is classified by how it was built and certified, and that classification controls whether anyone can occupy it long term in that zone — our guide to where a tiny home on wheels can legally be parked in Utah walks through how that plays out. For employers housing crews on land they already own, the calculus is different again, and the cost factors behind workforce housing projects are a better starting frame than residential ADU rules.

How to get a real answer for your specific parcel

Start with the address, not the zone map. Call or visit the planning department for the city the parcel sits in — or the county, if it is unincorporated — and ask four plain questions. Does this zone allow an accessory dwelling unit? Is owner occupancy required, and does it apply to the main house or to the ADU? Are internal and detached units treated differently here? What parking, setback, and size limits apply to this lot?

Then check the title and the private rules. An HOA can prohibit an accessory unit even where the city allows one, and a recorded covenant does not care what the ordinance says. Lenders and insurers also weigh in: adding a second dwelling to a rental can change how a loan is underwritten and how the property is insured, so loop in your lender before you commit to a design.

Last, look at utilities honestly. On an existing rental, the service that feeds the house was sized for one household. Adding a kitchen, a bathroom, and a second meter configuration can mean trenching, an upgraded panel, a new sewer lateral, and connection fees set by the city or district. That work is site-specific, and it is the line item most likely to surprise an owner who budgeted only for the building.

If the answer in your city is no, it is usually a clear no rather than a maybe — and knowing that in week one is worth far more than finding out in month four.

Frequently asked questions

Can I build an ADU on a property I rent out in Utah?

It depends entirely on the city. If the ordinance includes an owner-occupancy requirement, you generally cannot permit an ADU on a property where neither unit is your primary residence. Cities without that requirement may allow it subject to zoning limits like setbacks, size, and parking. Call the planning department for that specific address and ask whether owner occupancy applies, and to which unit.

Does the owner-occupancy rule apply to the main house or the ADU?

Either, depending on the ordinance. Many Utah cities let the owner live in the accessory unit and rent the main house, or vice versa — the requirement is that the owner lives somewhere on the parcel. Some are stricter about which unit. Because the wording varies city to city, ask the planner to point you to the exact language before you plan who lives where.

Can I rent out both the main house and the ADU?

In cities with owner-occupancy requirements, no — renting both units is the scenario those rules are written to prevent. In cities without that requirement, renting both may be allowed under the local ordinance, sometimes with a business license or rental registration. Short-term rental rules are usually separate and often stricter. The city decides, so verify for your address rather than relying on what a neighboring city permits.

Can I put a tiny home on wheels on a rental lot instead?

Usually not as a substitute for a permitted ADU. A home on a chassis is classified by how it was built and certified — recreational vehicle, park model, or residential structure — and that classification controls whether long-term occupancy is allowed in that zone. Cities along the Wasatch Front handle it differently, and some have no category for it at all, which means a conversation at the planning counter.

Will an HOA block an ADU on a rental property?

It can. HOA covenants are private agreements recorded against your title, and they operate independently of city zoning. Plenty of owners have received city approval and then a denial from their board. Read the recorded covenants and any architectural guidelines before you spend money on design, and ask the board directly in writing about accessory dwellings and rentals.

If you want to talk through what your lot and your city actually allow, come walk the model homes in Lehi and we will give you a straight read on your situation. See our homes at mycocoonhomes.com.