Concept plan, not to scale
Kayenta Courtyard
4 bed, 4.5 bath, 4,180 sq ft, single level
A single-level desert modern courtyard plan tuned for Ivins, Kayenta, and the red rock benches around Snow Canyon.
Casteca Homes, Custom home builder in St. George and Cedar City, Southern Utah
Custom homes designed for your lot in Southern Utah, built by the people you meet on day one.
Every Casteca home starts with a walk on your lot.
We read the slope, the views, the sun and the wind before we draw a line. Then you get one plan, one line-item budget and one person accountable for both.
Walk the land
We walk your lot at sunrise and sunset and map the views, the wind, the winter sun angle and the easements before we draw anything.
Design and price
A plan shaped to your site and the way you live, with a line-item budget you can see and question before you sign.
Build with one lead
We permit through Washington, Iron or Kane county, then build with our in-house team and trusted Southern Utah trades, with one project lead from start to finish.
Where we build in Washington, Iron and Kane counties
I started Casteca to build homes the way I'd want my own built: planned on your land, priced line by line, and built by people you know by name.
Casteca Homes at a glance
- Utah license
- General contractor #14205355-5501
- Coverage
- Insured and bonded
- Founded
- 2026
- Studios
- St. George and Cedar City, by appointment
- Counties
- Washington, Iron and Kane
- Warranty
- 2-year workmanship
- Estimated custom timeline
- 14 to 18 months, contract to keys, for a 4,000 to 6,000 sq ft home
- Custom build cost
- $450 to $750+ per sq ft
Estimated 2026 build cost for house construction, including normal grading. Excludes land, sitework beyond normal grading, landscaping, pools, permits and impact fees, and design and engineering. Not a quote or bid; your price is set only in a signed written agreement.
Starting plans, drawn for desert lots.
Concept plans, not designed or built homes. Each one is a starting point we reshape around your lot, your views and the way you live.
Concept plan, not to scale
Snow Canyon Pavilion
5 bed, 5.5 bath, 5,640 sq ft, single level
Long, low-slung pavilion plan with floor-to-ceiling glass framing the western Pine Valley horizon.
The people you will work with.
Casteca is founder-led and hands-on, from the first walk on your land to the final walkthrough.
Daniel Castillo
Founder
Daniel Castillo Jr
Foreman
Jose Tellez
Superintendent
What we commit to on every build.
- You talk to the builder
- Casteca is founder-led. The person who walks your lot and prices your plan is accountable for the build, from the first walk on your land to the day we hand over the keys.
- A budget you can read
- A line-item budget with every allowance spelled out before you sign. After that, the price changes only through a change order you approve in writing, including any selection you choose above its allowance.
- Regular walkthroughs
- Regular on-site walkthroughs and budget updates, so you always know where your home stands and what comes next.
- Designed for your lot
- Each home is designed around your land, your light and the way you live, never forced from a stock plan.
- Reachable after closing
- We hand over the keys with a binder and a walkthrough, and we stay reachable long after closing.
Questions we hear most.
Have a question we have not answered? We respond within one business day.
How long does a custom Casteca home take from contract to keys?
For a typical 4,000 to 6,000 square foot custom home in Washington County, plan on 14 to 18 months from signed contract to final keys. Roughly 3 months of design, 2 to 3 months of permitting, and 9 to 12 months of construction. Larger or more architectural builds run longer. We will give you an honest schedule before you commit.
Where in Southern Utah do you build?
Across Washington, Iron, and Kane counties, including St. George, Ivins, Hurricane, Washington, Santa Clara, Cedar City, Kanab, Springdale, Pine Valley, and the surrounding communities. If your lot is in Southern Utah, we likely build there.
Do I need to own the lot before I contact you?
Not at all. We help clients evaluate land before purchase, including sun orientation, soil, view corridors, HOA restrictions, and total cost-to-build. A bad lot can derail a great house, so we would rather walk the land with you first.
What does a custom home cost per square foot in Southern Utah?
For the build itself, a Casteca custom home in St. George, Ivins, or Washington typically runs about $450 to $750+ per finished square foot depending on finish level, with our Premium tier around $600. Cedar City and the outlying counties tend to run lower. That figure is build cost; land, sitework beyond normal grading, landscaping, pools, permits and impact fees, and design and engineering are quoted separately, and we give you a transparent line-item budget before you sign anything.
You are a new builder. Why should I trust you with my home?
We are honest about being a new company in 2026, with no completed homes to point to yet, so we earn trust through transparency rather than a long client list. You work directly with the owner, not a layer of project managers, and you get full line-item budgets, written change orders, and a licensed, insured, bonded GC standing behind a 2-year warranty. A builder this focused on its first homes has every reason to get yours exactly right.
Tell us about your land.
Share your lot, your timeline and what you are imagining. We respond within one business day to schedule a discovery call at our St. George or Cedar City studio.