Casteca Homes

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Start Your Build435-817-6859
Kayenta Canyon Residence, Casteca Homes Southern Utah custom home builder

Custom Built //

Modern Living //

Southern Utah //

Studios in St. George & Cedar City, UT

Building across

Washington · Iron · Kane Counties

Casteca Homes, Custom Home Builder in St. George and Cedar City, Southern Utah

Now booking 2026 custom home builds

Casteca Homes designs and builds architectural custom and new construction homes across Southern Utah, from Parowan to St. George.

Start Your BuildView the Concepts
  • Licensed Utah General Contractor
  • Insured & Bonded
  • 2-Year Workmanship Warranty
  • Architectural Design
  • Energy-Efficient Construction
  • Serving Washington, Iron & Kane Counties
  • Studios in St. George & Cedar City
  • Free Discovery Consultation
  • Licensed Utah General Contractor
  • Insured & Bonded
  • 2-Year Workmanship Warranty
  • Architectural Design
  • Energy-Efficient Construction
  • Serving Washington, Iron & Kane Counties
  • Studios in St. George & Cedar City
  • Free Discovery Consultation

(01), The Studio

We build homes that feel inevitable on the land, architectural, durable, and unmistakably Southern Utah.

Licensed

Utah General Contractor, insured and bonded

23

Southern Utah communities in our build area, Parowan to St. George

2

Studios, St. George and Cedar City, by appointment

2-yr

Workmanship warranty on every Casteca home

Casteca Homes is a Southern Utah custom home builder and new construction contractor based in St. George, with a second studio in Cedar City. We design, permit, and build architectural homes for clients across Washington County, Iron County, and Kane County, including St. George, Washington, Hurricane, Ivins, Santa Clara, Cedar City, Kanab, Springdale, and Pine Valley.

Whether you are building a custom home on your own land, looking at a new construction home we have underway, or planning a major renovation, our team handles design, permitting, scheduling, and construction under one roof. One project lead, one timeline, one accountable builder, from the first walk on your lot to the day we hand over the keys.

(02), Design Concepts

The homes we design.

A look at the architectural concepts we design for Southern Utah, shaped by the land, the light, and the way you live. These show our style and range. They are not completed homes, since our first builds are just getting underway.

Explore the Concepts
Kayenta Canyon Residence
Desert Modern
Ivins, UT

Kayenta Canyon Residence

Desert Modern

4 bd · 4.5 ba · 5,240 sq ft

Snow Canyon Modernist
Modern
St. George, UT

Snow Canyon Modernist

Modern

5 bd · 5.5 ba · 6,180 sq ft

Coral Cliffs Estate
Contemporary
Washington, UT

Coral Cliffs Estate

Contemporary

6 bd · 6.5 ba · 7,420 sq ft

Zion Overlook Residence
Mountain Contemporary
Hurricane, UT

Zion Overlook Residence

Mountain Contemporary

4 bd · 4 ba · 4,180 sq ft

Pine Valley Lodge
Mountain Contemporary
Pine Valley, UT

Pine Valley Lodge

Mountain Contemporary

5 bd · 4 ba · 4,860 sq ft

Vermilion House
Desert Modern
Kanab, UT

Vermilion House

Desert Modern

3 bd · 3.5 ba · 3,640 sq ft

(03), In Progress

New homes underway.

New construction homes we have in design and underway across Southern Utah. Reserve early and shape the finishes before they are complete.

See Homes Underway
Ledges Modern No. 12
Coming Soon

Ledges Modern No. 12

$2,495,000

245 N Sage Cliff Dr, St. George, UT 84770

5 bd · 5.5 ba · 5,240 sq ft

Kayenta Spec Residence
Coming Soon

Kayenta Spec Residence

$2,895,000

1402 W Sandstone Ridge Rd, Ivins, UT 84738

4 bd · 4.5 ba · 4,180 sq ft

Coral Canyon Estate No. 3
Coming Soon

Coral Canyon Estate No. 3

$1,985,000

Coral Canyon Pkwy, Washington, UT 84780

5 bd · 5 ba · 4,960 sq ft

Why Casteca

New to the market, built to outwork it.

Casteca Homes started in 2026, and that is the point. A new builder with a Utah GC license, a modern design sense, and pricing set below the established names puts more of your budget into the house and a founder on the line for the result.

You talk to the builder, not a sales floor

Casteca is founder-led and hands-on. The person who walks your lot and prices your plan is the one accountable for the build, so nothing gets lost between a salesperson and a crew you never meet.

Pricing set below the established names

We researched the Southern Utah market and positioned our build cost at the low end of true custom, well under the long-time custom shops carrying a name-brand premium. You see a real line-item budget, not a teaser number that grows after you sign.

A modern eye, not a dated catalog

We design to how people live now, clean lines, real daylight, materials that age well, instead of repeating the same floor plan a builder has poured for twenty years.

Lean overhead, more in the house

No model-home village, no layered management, no decades of brand markup to carry. That cost discipline goes into your framing, finishes, and systems rather than into our overhead.

Credentials you can verify today

Licensed Utah general contractor 14205355-5501, fully insured and bonded, with a 2-year workmanship warranty on every home. New as a brand, fully accountable as a builder.

First clients, not client number five hundred

Building Casteca's reputation starts with your home, so it gets founder-level attention and weekly walkthroughs. We have every reason to make the early homes the ones we point to.

(04), Materials & Finishes

The palette we build from.

A restrained set of honest materials, chosen to weather, age, and belong on the Southern Utah landscape. We specify the same quality whether the home is 3,000 square feet or 8,000.

01

White Oak

Rift-sawn, hard-wax oil

Floors, millwork, and ceilings in a warm, even grain. Finished with a natural oil that ages instead of yellowing.

02

Limestone

Honed, full-bed veneer

Cladding and hearths in a pale desert stone that holds the morning light and cools the house through the summer.

03

Blackened Steel

Hot-rolled, clear matte seal

Stair stringers, window surrounds, and structural reveals. Quiet, precise lines that frame the architecture without shouting.

04

Lime Plaster

Hand-troweled, integral pigment

Interior and exterior walls with depth a paint roller cannot reach. Breathable, durable, and made by hand on site.

05

Board-Form Concrete

Cast in rough-sawn pine

Foundations, fireplaces, and feature walls that carry the grain of the timber they were poured against.

06

Heavy Timber

Douglas fir, exposed joinery

Beams, posts, and ceilings for the mountain builds. Real structure left visible, joined to last generations.

(05), How We Build

Six steps.
One team.

From the first walk on your land to the day we hand over the keys, you work with one project lead and a local Southern Utah team. No subbed-out chaos, no finger-pointing.

See the full process
01

Discovery

We sit down at our St. George or Cedar City studio, or on your land, and listen. How you live, what you have collected, the morning routines, the dinner parties. Architecture starts here, not at the drafting table.

02

Site and Schematic

We walk your lot at sunrise and sunset. We map the views, the wind, the winter sun angle, the easements. Then we draw, first by hand, then in 3D, until the plan feels inevitable.

03

Design Development

Materials, finishes, fixtures, and the thousand small decisions that make a house feel custom. You will have a single project lead from start to finish, no handoffs.

04

Permitting and Pre-Construction

We handle permitting through Washington, Iron, and Kane counties and coordinate the HOAs, the inspections, and the timing, so you do not have to.

05

Build

Our in-house team and trusted Southern Utah trades break ground. Weekly walkthroughs, transparent budgeting, and a project portal where you can track every line item in real time.

06

Keys and Beyond

We hand over the keys with a binder, a walkthrough, and a promise: a 2-year workmanship warranty and a builder who stays reachable after closing.

(06), Our Promise

What building with Casteca feels like.

We are a new company holding ourselves to a simple standard: the experience should be as considered as the architecture. Here is what we commit to on every build.

One accountable lead

You work with one project lead from the first walk on your land to the day we hand over the keys. No subbed-out chaos, no finger-pointing.

A budget you can read

A line-item budget you can see and question, with no surprise markups buried in the total. You always know what you are paying for.

Weekly walkthroughs

Regular on-site walkthroughs and a project portal, so you always know exactly where your home stands and what comes next.

Licensed and local

A licensed, insured, and bonded Utah general contractor building only in Southern Utah. We know the counties, the inspectors, and the land.

A 2-year warranty

Every Casteca home carries a 2-year workmanship warranty, and we stay reachable long after closing.

Architecture first

Each home is designed around your land, your light, and the way you actually live, never forced from a stock plan.

(07), Where We Build

Every corner of Southern Utah.

From the red rock of St. George to the alpine air of Brian Head, Casteca builds custom homes across Washington, Iron, and Kane counties.

St. GeorgeWASWashingtonWASHurricaneWASIvinsWASSanta ClaraWASLaVerkinWASToquervilleWASApple ValleyWASCedar CityIROEnochIROParowanIROKanabKANSpringdaleWAS

(08), Frequently Asked

Things we hear most.

Have a question we have not answered? Reach out, we will respond within one business day.

Contact the studio
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 is the difference between a custom build and your available homes?
A custom build is designed from scratch around your land, your life, and your taste, typically 14 to 18 months. A Casteca home in progress is one we have already designed and started on a great lot, so you move in sooner and still get to shape the finishes. It is the faster path to a Casteca home.
Can I see your work before signing?
Yes. We will walk you through our design concepts, any homes we currently have under construction, and the detailed finish and material specifications we hold every build to. As our pipeline grows, we will also arrange in-person walkthroughs of completed homes.
Do you handle interior design?
We work with trusted interior design partners across Southern Utah, and you are welcome to bring your own designer. If you do not have one, we will match you to the right fit for your style and budget.
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 $305 to $525 per finished square foot depending on finish level, with our Premium tier around $385. Cedar City and the outlying counties tend to run lower. That figure is build cost; land, sitework, landscaping, and pools are quoted separately, and we give you a transparent line-item budget before you sign anything.
Are you licensed and insured?
Yes. Casteca Homes is a fully licensed Utah General Contractor, fully insured and bonded.
How do I finance a custom build, and how does a construction loan work?
Most clients use a construction loan that funds the build in stages, then converts to a standard mortgage once the home is finished. We do not lend or arrange financing ourselves, so the best first step is a conversation with a local Southern Utah construction lender who knows our market and the draw process. We are glad to coordinate with whichever lender you choose and supply the budgets and schedules they need.
What do your finish levels cost per square foot?
We bid custom homes by finish level: roughly $305 per square foot at our Standard level, $385 at Premium, and $525 at Luxury, before land, sitework, landscaping, and pools. Our spec and new-construction homes run about $260 per square foot because the plan and finishes are standardized. Cedar City and outlying areas tend to run lower than St. George. Every project gets a transparent line-item budget before you sign.
What is included in your price, and what gets quoted separately?
The per-square-foot figure covers the home itself: structure, systems, and the finishes at your chosen level. Land, sitework beyond normal grading, landscaping, and pools are quoted as separate line items because they vary so much by lot. We spell out every one of these in your budget so there are no surprises later.
Can you build on land I already own?
Yes, and many of our clients do. We will review your lot for orientation, soils, slope, access, view corridors, and any HOA or jurisdiction restrictions, then design the home around it. If the land has challenges, we tell you up front and fold the sitework into your budget rather than discovering it mid-build.
Can you help me find or evaluate a lot before I buy?
Absolutely. We walk prospective lots with clients before purchase and weigh sun orientation, soil, drainage, view corridors, HOA rules, and total cost-to-build, not just the asking price. A cheap lot with hard sitework can cost more than a pricier, buildable one, so we would rather help you choose well first.
How do allowances and selections work?
Your budget includes allowances for selection categories like flooring, cabinetry, countertops, fixtures, and appliances, set at your finish level. You choose within those allowances with our team, and if a selection runs above or below its allowance, the difference is credited or added transparently. We keep a running selections sheet so you always know where the budget stands.
What happens if I want to change something during construction?
Changes are handled through a written change order that states the scope, the cost, and any schedule impact, and we both sign it before the work proceeds. That keeps the budget and timeline honest and avoids verbal misunderstandings on site. Minor tweaks are easy early on, and we will always tell you when a change starts to affect framing or systems already in place.
What does your warranty cover?
Every Casteca home comes with a 2-year workmanship warranty backed by our Utah license, bond, and insurance. If something we built is not right within that period, we come back and make it right. Manufacturer warranties on items like appliances, windows, and roofing run separately and often longer.
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.
Architectural detail of a Casteca custom home

(09), Begin

Let us design
the home you will keep.

Tell us about your land, 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.

Start Your BuildCall 435-817-6859