How Much Does a Casita or ADU Cost in Southern Utah?
Why there's no single price, what actually drives the cost, and how long one takes to build.
The Honest Answer
There's no single price, and any contractor who gives you one over the phone is guessing. A casita packs the two most expensive rooms in any build, a kitchen and a bathroom, into a small footprint. That's why additions in this market range widely, from around $50,000 for a simple room addition to $300,000 or more for a full detached casita with its own kitchen, bath, and living space.
Why Square Footage Isn't the Driver
People expect cost to track with size, but it doesn't. The biggest cost drivers on an addition aren't the open living areas, they're the wet rooms. A plain bedroom addition without a bathroom can be far cheaper than a smaller casita with a full kitchen and bath. Square footage matters less than how many kitchens and bathrooms you're building.
What Goes Into the Cost
- Kitchen and bath fit-out. The single biggest factor, for the reasons above.
- Foundation. Every addition starts with a compaction test. Poor soil means digging out and replacing it with engineered road base before any concrete.
- Attached vs. detached. An attached casita can sometimes tie into existing plumbing; a detached one needs its own utility runs.
- Roof tie-in. Blending a new roofline into the existing house cleanly (what framers call an overbuild) takes real work.
- Finishes. The same choices that drive any remodel.
Permits and Timeline
Once permits are in hand and the three required subs (HVAC, electrical, and plumbing) are signed onto the permit, the build itself runs about sixteen weeks. The permits themselves can take a few months, depending on the county and how complete your plans are when you submit. If you're in a hurry, the permit stage is usually the long pole.
Why People Build Them
The casita is the most-requested addition in this market. Most are built for rental or Airbnb income or to house family. If income is the goal, a few design choices matter, like a separate entrance and a kitchen big enough to actually use, and we'll plan for them up front.
Casita & ADU Cost FAQ
How much does a casita or ADU cost in Southern Utah?
There's no single price. Additions range from around $50,000 for a simple room addition to $300,000 or more for a full detached casita with its own kitchen, bath, and living space, because the kitchen and bathroom drive most of the cost.
Why does a small casita cost so much?
Because it packs a kitchen and a bathroom, the two most expensive rooms to build, into a small footprint. Square footage matters less than how many wet rooms you're building.
How long does it take to build a casita?
About sixteen weeks of build time once permits are in hand and the HVAC, electrical, and plumbing subs are signed on. Permits themselves can take a few months.
Can I build a casita for rental income?
Yes. Most casitas in this area are built for rental, Airbnb, or family. If income is the goal, a separate entrance and a usable kitchen matter, and we'll design for that.
Considering a Casita or ADU?
The only way to know your real number is a walkthrough. It's free, and we'll tell you straight.
435-467-4023