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Homes with Casitas & Guest Houses in Grantsville, Utah
Grantsville sits at the western edge of Tooele Valley, about 35 minutes from the Salt Lake City airport and a world away from Wasatch Front density. Lot sizes here are the real story for casita and guest house shoppers — half-acre, one-acre, and multi-acre parcels are common, especially on the south and west sides of town toward South Willow Canyon and the Stansbury foothills. That kind of land makes detached guest quarters actually feasible, which is rare in tighter Utah markets. Buyers come to Grantsville specifically because they can put grandparents in a casita, run a short-term rental out of a separate building, or house an adult child without bumping into setback issues every weekend.
The buyer profile leans toward multigenerational families, remote workers wanting a separate office structure, and folks relocating from California or out-of-state who are used to ADU-friendly zoning. Grantsville City allows accessory dwellings under specific conditions tied to lot size, owner-occupancy, and connection to municipal utilities, so the legal status of an existing casita matters — some are permitted ADUs, some are guest quarters without kitchens, and some are mother-in-law setups inside the main footprint. Price points typically run from the mid $600s for older homes with converted outbuildings up past $1.2M for newer custom builds on acreage with purpose-built guest houses. Browse the active listings below to see what's currently on the market in and around Grantsville.
May 2026 · Grantsville market
Live from the Utah MLS — what's actually happening in Grantsville right now.
Median sale
$629,000
29 closed in May 2026
Median DOM
26 days
listing → contract
Sale-to-list
98.5%
of final list price
Unsold inventory
127
active + pending
3 matching · page 1 of 1
Active listings
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Common questions
About homes with casitas & guest houses in Grantsville.
Does Grantsville allow accessory dwelling units (ADUs)? ▾
Yes, Grantsville City permits ADUs under its zoning code, but conditions apply — typically minimum lot size, owner-occupancy of the primary residence, adequate parking, and connection to city water and sewer. Detached ADUs face stricter rules than internal ones. Always verify the specific zoning on a parcel with Grantsville City before assuming a casita is legally rentable.
What's the difference between a casita, a guest house, and an ADU in Grantsville listings? ▾
In local MLS practice, a casita usually means smaller attached or semi-attached guest quarters, often without a full kitchen. A guest house is typically detached with its own bath and sometimes a kitchenette. An ADU is the legal designation — it requires permits, a full kitchen, and meets city code as an independent dwelling. Many Grantsville listings use these terms loosely, so confirm what's actually permitted.
Can I rent out a casita or guest house in Grantsville? ▾
Long-term rentals of permitted ADUs are generally allowed if the owner occupies the main home and the unit meets code. Short-term rentals (under 30 days) are more restricted and require separate licensing through Grantsville City. Unpermitted guest quarters cannot be legally rented as separate dwellings regardless of how they're built.
What price range should I expect for a Grantsville home with a guest house? ▾
Most homes with casitas or detached guest houses run roughly $650K to $1.3M, depending on acreage, age, and whether the secondary structure is permitted. Properties on one acre or more with a true detached ADU tend to sit at the higher end. Older farmhouses with converted outbuildings can come in lower but often need work to bring the second unit up to code.
Are there many homes with guest houses on the Grantsville market at any given time? ▾
Inventory is limited — usually a handful of active listings at a time rather than dozens. The combination of larger lots and existing secondary structures isn't common, so well-priced properties tend to move quickly when they hit. Setting up MLS alerts for new listings is the practical way to catch them.
How far is Grantsville from Salt Lake City and the airport? ▾
Grantsville is about 35 to 40 minutes from Salt Lake City International Airport via I-80, and roughly 45 minutes to downtown Salt Lake outside of rush hour. Tooele is 10 minutes south, and the closest major shopping is in Stansbury Park. It's a real commute, but manageable for hybrid workers.