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Homes with Casitas & Guest Houses in Washington, Utah
Washington sits just east of St. George in the heart of Utah's Dixie, where multigenerational living and visiting family from out of state are part of daily life. That's why homes with casitas and detached guest houses move quickly here — snowbird parents, adult kids working remotely from Salt Lake or Vegas, and owners who want separate space for grandkids all create steady demand. The climate helps too: with roughly 255 sunshine days a year and mild winters in the 50s and 60s, a guest suite gets used twelve months out of the year, not just summers. Most of the inventory you'll see is in newer master-planned communities like Sienna Hills, Coral Canyon, and Long Valley, along with custom builds tucked into Green Spring and the bench lots above Washington Fields.
Layouts vary widely, so it pays to read each listing closely. Some homes have a true detached casita with its own kitchen, laundry, and private courtyard entry — the setup most buyers picture. Others list an attached suite over the garage or a converted mother-in-law wing sharing the main HVAC. Washington City zoning allows long-term rental of accessory units in most residential zones, but short-term nightly rentals are limited to specific overlay areas, which matters if you're underwriting rental income. Lot size, HOA rules, and whether the second unit has separate utilities all affect both lifestyle and resale. Browse the active listings below to see what's currently on the market.
May 2026 · Washington market
Live from the Utah MLS — what's actually happening in Washington right now.
Median sale
$515,995
62 closed in May 2026
Median DOM
47 days
listing → contract
Sale-to-list
98.3%
of final list price
Unsold inventory
514
active + pending
43 matching · page 1 of 2
Active listings
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Common questions
About homes with casitas & guest houses in Washington.
What's the difference between a casita and a detached guest house in Washington listings? ▾
In local MLS language, a casita usually refers to a smaller attached or semi-attached suite with its own exterior entrance, often around 300-600 square feet with a bedroom, bath, and sometimes a kitchenette. A guest house is typically fully detached with its own address-ready utilities, a full kitchen, and 600-1,200 square feet. Both are common in Washington, but financing and short-term rental treatment can differ, so read the remarks carefully.
Can I legally rent out a casita or guest house in Washington City? ▾
Long-term rentals of an accessory unit are allowed in most Washington City zones, but nightly and short-term rentals are restricted to specific overlay zones and some HOA-approved communities like Coral Canyon and parts of Sienna Hills. Always confirm the zoning and HOA rules on the specific parcel before assuming Airbnb income is on the table.
Which Washington neighborhoods have the most homes with casitas? ▾
You'll see the highest concentration in newer master-planned areas like Sienna Hills, Long Valley, and the benches above Telegraph, plus custom builds in Green Spring and the Washington Fields corridor. Older Washington Heights homes occasionally have converted garage suites or detached studios on larger lots.
Do casitas add resale value in the Washington market? ▾
Yes, particularly well-built detached units with a full kitchen and separate utilities. Local appraisers typically credit a finished, permitted guest house at a meaningful premium over the same square footage inside the main house, because buyers here actively want space for visiting family, adult children, or rental income.
How does financing work on a home with a guest house? ▾
Conventional and FHA loans treat a single legal parcel with an accessory dwelling as one property, so you finance it like a standard home. If the unit has its own meter and address, some lenders will count a portion of projected rent toward qualifying income. Properties listed as true duplexes are a separate category and follow multi-family loan rules.
What price range should I expect for these properties in Washington? ▾
Homes with a true casita or detached guest house in Washington generally start in the high $600s and run well past $1.5M for custom builds in Green Spring or on view lots above Washington Fields. Attached mother-in-law suites in production neighborhoods can sometimes be found in the upper $500s when the market softens.