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Homes with Casitas & Guest Houses in Millcreek, Utah
Millcreek sits in the sweet spot of the Salt Lake Valley — close enough to downtown for a 15-minute commute, but pressed up against the Wasatch with Mount Olympus and Mill Creek Canyon as the backdrop. Homes here skew older and larger-lotted than newer suburbs to the south, which is exactly why casitas and detached guest houses turn up more often in Millcreek than in places like Daybreak or Herriman. Original mid-century ramblers on quarter-acre and half-acre lots gave later owners room to add a detached studio over the garage, a pool house with a full bath, or a true secondary dwelling tucked behind the main home. Neighborhoods like Olympus Cove, Canyon Rim, and East Millcreek are where these setups cluster.
Buyers shopping for a second living unit in Millcreek usually fall into a few camps: multigenerational families who want aging parents nearby but independent, remote workers who need a separate office-with-bathroom, and owners who plan to long-term rent the unit to offset a Salt Lake County mortgage. Millcreek City has its own ADU ordinance — separate from Salt Lake City's rules — and permitted units carry real value at resale, so it's worth confirming permit status during due diligence. Climate matters too: south- and west-facing casitas get strong winter sun, which keeps heating bills reasonable through January inversions. Browse the active listings below to see which Millcreek homes currently have a casita, guest house, or detached secondary unit on the property.
May 2026 · Millcreek market
Live from the Utah MLS — what's actually happening in Millcreek right now.
Median sale
$625,000
34 closed in May 2026
Median DOM
10 days
listing → contract
Sale-to-list
100.0%
of final list price
Unsold inventory
137
active + pending
5 matching · page 1 of 1
Active listings
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Common questions
About homes with casitas & guest houses in Millcreek.
What counts as a casita or guest house in Millcreek listings? ▾
On the Salt Lake MLS, agents flag a property as having a casita or guest house when there's a separate living structure with its own entrance, kitchen or kitchenette, and bathroom. In Millcreek that ranges from a converted detached garage with a studio above it to a full secondary dwelling on larger Olympus Cove or Mount Olympus lots. Mother-in-law apartments inside the main house are usually listed separately as accessory apartments.
Does Millcreek allow ADUs and rentals of guest houses? ▾
Millcreek City adopted accessory dwelling unit regulations that allow both internal and detached ADUs in most residential zones, subject to owner occupancy, parking, and size limits. Short-term rentals under 30 days are restricted, but long-term rental of a permitted ADU is generally allowed. Always confirm the specific permit history with Millcreek Community & Economic Development before writing an offer.
Where in Millcreek are casitas most common? ▾
The larger lots east of 2300 East — Olympus Cove, Canyon Rim, and the foothill streets climbing toward Mount Olympus — tend to have the room for detached guest quarters. You'll also see them on older deep lots in East Millcreek near Skyline High, where original 1950s ramblers have been expanded with separate units over the decades.
What do homes with guest houses typically cost in Millcreek? ▾
Millcreek's median single-family price has been running in the high $600Ks to low $800Ks, and homes with a legal detached casita usually trade at a $100K–$300K premium over comparable single-structure homes. Foothill properties with views of the Salt Lake Valley and a permitted guest house can push past $1.5M.
Can I use rental income from the casita to qualify for my mortgage? ▾
If the unit is a legally permitted ADU and the seller can document rental history, most conventional and FHA lenders will count a portion of that income toward qualifying. Unpermitted units generally don't count. Ask for the city permit record and any existing lease early in your due diligence.
How many Millcreek homes with casitas are usually on the market? ▾
Inventory is thin — Millcreek has roughly 20,000 households total, and detached guest structures are a small slice of that. At any given time there are typically a handful of active listings with a true casita or guest house. The list below updates in real time as new properties hit the MLS.