Structural Engineer–Owned Design-Build for High-Altitude Summit County Construction
Known as the Gateway to the Gore Range, Silverthorne sits at 8,790 feet in Summit County — a mountain setting where construction is shaped by elevation, rocky soils, steep driveways, and a short building season. PrimeStone Construction Group is a structural engineer–owned design-build firm building custom mountain homes and full renovations in Silverthorne, engineered for the high country.
Get a Free Consultation → 720-468-0686
Serving Silverthorne, CO
PrimeStone serves Silverthorne and the surrounding Summit County area. Here’s our service area:
Why Silverthorne Homeowners Choose PrimeStone
- Structural engineer–owned: At 8,790 feet with rocky soils and steep sites, snow-load and foundation engineering are essential — done in-house.
- High-altitude expertise: We engineer for Silverthorne’s elevation, snow loads, and freeze-thaw conditions.
- Terrain-savvy: Rocky soils and steep driveways drive cost and design; we plan for them from the feasibility stage.
- Dual-review know-how: Silverthorne construction is reviewed by both the Town and Summit County; we manage the full process.
- Remote-owner friendly: Many Silverthorne homes are second homes; we manage projects with clear remote communication.
Our Services in Silverthorne
In Silverthorne, our work centers on ground-up custom mountain homes and comprehensive renovations:
Building Permits & Regulations in Silverthorne
Construction in Silverthorne runs through the Town of Silverthorne Community Development (Building Division; planning@silverthorne.org, 970-262-7356), with plan review by Town departments and the Summit County Building Department. Mountain construction carries requirements you won’t find on the Front Range. Key points:
- Dual review: The Town of Silverthorne reviews per Town Code while the Summit County Building Department reviews per the Building Code.
- Excise tax: A $2.00-per-square-foot excise tax (covering living space, unfinished space, and garage) applies to new residential construction, paid at submittal.
- Engineer-stamped structurals: Structural drawings must be stamped by a Colorado architect or engineer, with design loads and code versions specified.
- Sprinklers on larger homes: A life-safety/sprinkler permit is required for homes over 6,000 sq ft (and in certain filings).
- Inspection transition: As of August 2026, inspection services (except electrical) are transitioning to a third-party provider (CBCS) — we track the current process.
Silverthorne and Summit County mountain-construction requirements are complex and changing (including the 2026 inspection transition). PrimeStone confirms current requirements with the Town of Silverthorne for every project.
Silverthorne Areas We Serve
We serve homeowners throughout Silverthorne and the surrounding Summit County area, from the neighborhoods near downtown and the Blue River to the Eagles Nest and Three Peaks areas. Silverthorne’s mix of second homes and full-time mountain residences makes custom homes and comprehensive renovations the primary projects — all engineered for the high-altitude environment.
Frequently Asked Questions
Does PrimeStone build in Silverthorne?
Yes. We build custom mountain homes and undertake full renovations throughout Silverthorne and Summit County, engineered for the high-altitude environment, rocky soils, and steep terrain.
Why does building in Silverthorne cost more?
At 8,790 feet, homes require engineered snow-load structures and foundations for rocky soils and steep sites, plus mountain logistics and a short construction season. Summit County construction costs are among the highest in Colorado. A $2/sq ft excise tax also applies to new construction.
Who reviews building permits in Silverthorne?
Silverthorne construction is reviewed by both the Town of Silverthorne (per Town Code) and the Summit County Building Department (per the Building Code). We manage this dual-review process for you.
Do I need sprinklers in my Silverthorne home?
A life-safety/sprinkler permit is required for homes over 6,000 square feet, and in certain filings such as the Eagles Nest Golf Course area. We design and coordinate these where required.
Can you manage my Silverthorne project remotely?
Yes. Many Silverthorne homes are second homes, so we manage projects with clear, regular remote communication and detailed updates for owners who aren’t local.
Ready to Start Your Silverthorne Project?
Whether you’re building a custom mountain home or renovating an existing one in Silverthorne, PrimeStone’s structural engineer–owned team builds for the high country, from design through move-in.
Get a Free Consultation → 720-468-0686 · info@primestonecg.com