Casteca Homes
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2026 Cost Guide, Washington County

Cost to build a custom home
in Santa Clara, Utah.

Honest, line-item numbers for a Casteca-quality custom home in Santa Clara. Per-square-foot, soft costs, lot complexity, and a real example budget for a 4,500 sqft residence.

Mid-Range

$580/sqft

Range

$493 to $725

4,500 sqft Example

$2,610,000

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How we calculate this

Real numbers, no fluff.

The mid-range $580/sqft figure for Santa Clara reflects what a Casteca custom home actually costs to deliver in this market in 2026, including site work, structure, mechanicals, finishes, landscape, and the soft costs (architecture, engineering, permits, project management). It excludes the cost of the lot itself.

Why is Santa Clara priced where it is? Washington County labor and freight, prevailing soil conditions, common architectural style, and the typical lot characteristics all factor in. Santa Clara River, Jacob Hamblin Home also influence demand and supplier pricing in the area.

Example Budget

A 4,500 sqft Casteca home in Santa Clara.

Site work and foundation$182,700
Structure, framing, sheathing, roofing$600,300
Mechanical, HVAC, plumbing, electrical$261,000
Windows and doors$208,800
Interior finishes, millwork, flooring$495,900
Kitchen, bath, fixtures, appliances$182,700
Landscape, hardscape, pool, exterior$261,000
Soft costs, architecture, engineering, permits$208,800
Builder fee and contingency$208,800
Approximate total$2,610,000

FAQ, Santa Clara Costs

Things people ask.

What is the average cost to build a custom home in Santa Clara, Utah in 2026?
In 2026, a Casteca-quality custom home in Santa Clara typically lands between $2,218,500 and $3,262,500 for a 4,500 square foot residence, all-in. Mid-range cost-per-square-foot sits at roughly $580 for our standard finish package.
What does that price include?
It includes site work, foundation, full structural shell, mechanicals (HVAC, plumbing, electrical), windows and doors, interior finishes, kitchen and bath fixtures, landscape and hardscape, and all soft costs including architecture, engineering, permits, and project management. It does not include the lot itself.
What raises the cost in Santa Clara specifically?
Lot complexity is the biggest variable. Santa Clara sites with significant slope, retaining walls, deep utility runs, or expansive soils often add $80,000 to $300,000 before the foundation pours. Architectural complexity, finish level, and glass packages also move the number meaningfully.
How long does a custom home take in Santa Clara?
For a typical custom home in Washington County, plan on 14 to 18 months from signed contract to keys. Roughly 3 months of design, 2 to 3 months of permitting, and 9 to 12 months of construction.
Is it cheaper to buy a finished home in Santa Clara versus building?
Often yes, on a pure cost-per-square-foot basis. The reason owners choose to build is that a resale home almost never matches the floor plan, finishes, view orientation, or quality they actually want. We are happy to walk you through a build vs buy analysis honestly.
Does Casteca Homes work outside of Santa Clara?
Yes. We build across Washington, Iron, and Kane counties, including St. George, Ivins, Hurricane, Cedar City, Kanab, Springdale, and the surrounding communities. Our flagship studio is in St. George with a second studio in Cedar City.

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Santa Clara?

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