THORNHILL CONSTRUCTION
Family-Owned & Operated Since 1977

Placerville's Deck Experts for 55 Years.

Custom deck installation and expert repair – we build outdoor spaces that last.

4.9★ Average (118 Angi Reviews)
BuildZoom Score 93 (Top 27% CA)
CSLB #336956 • Licensed Since 1977

Specialists in Outdoor Wood & Composite

We don't do kitchens. We don't do bathrooms. We pour every ounce of our 55 years of experience into decks.

New Deck Installation

From custom designs to material selection—whether you prefer the classic warmth of redwood and cedar or the low-maintenance durability of modern composite—we build it right. Every structure is California code-compliant and engineered specifically to withstand our unique mountain and foothill climates.

  • Custom Design Consultations
  • Premium Wood & Composite Options
  • Wheelchair Ramps & Accessibility Builds

Deck Repair & Restoration

Don't let a worn deck become a safety hazard. We perform thorough structural inspections, replace compromised joists and rotted wood, upgrade railings to current code, and restore stairs. As one homeowner noted, "The deck is solid, safe, and built to last... the work area was kept clean once completed for the day."

  • Structural Safety Upgrades
  • Rotted Wood & Joist Replacement
  • Immaculately Clean Job Sites
"Larry did a beautiful job on our new deck. His work ethic and his and his team's (Danny) craftsmanship went beyond what I could have asked for! He said the job would be completed in 10 days, and it was. He quoted a more than reasonable price and stuck to that price. Larry is the real deal! If I could give him 10 out of 10 stars, I would!! Hire Thornhill Construction, you will not be disappointed!!"
Cynthia N. Project: Repair a Deck or Porch

Ready to transform your outdoor space?

Call Larry today for a straightforward conversation about your project.

(530) 303-3950

Master Craftsmen, Built Decks Only.

We don't do kitchens. We don't do bathrooms. We pour every ounce of our 55 years of experience into decks and outdoor structures. That singular focus means we know wood, we know load-bearing, we know drainage, and we know what survives a Placerville summer.

Service 01

New Deck Installation

Building a new deck starts with a conversation. During our design consultation, we walk your property, discuss how you want to use the space, and help you select the perfect materials. Whether you want the rich, natural aroma of treated lumber, redwood, or cedar, or the fade-resistant longevity of modern composite, we source the best.

We integrate sturdy railing styles and code-compliant stair systems seamlessly into the design. Need accessibility? We also build custom wheelchair ramps designed for safety and ease of use. As Jesse C. shared: "Larry, John, and the entire crew not only offered me the best price on the ramp build but also exceeded my expectations with their work."

Beautiful newly installed composite deck with sturdy railings overlooking trees
Service 02

Deck Repair & Restoration

California heat, winter moisture, and decades of use take a toll on outdoor wood. If your deck is sagging, splintering, or feels soft underfoot, it's time for a professional inspection. We look past the surface to evaluate the structural integrity of your joists, beams, and footings.

We replace compromised framing and decking, upgrade older structures to meet current safety codes, and apply premium sealing and staining. Proper sealing isn't just about looks—it's critical for fire safety and weather resistance in the foothills. We leave your property cleaner than we found it.

Close up of sturdy wood deck boards being restored and stained

The Thornhill Difference

See the difference quality makes. Real projects in El Dorado County.

Before: Worn wooden stairs with white-painted railing in Placerville
Before Worn Wooden Stairs
After: New stairs with black metal railing leading to an elevated deck
After New Stairs with Black Railing
Before: Damaged deck stairs with missing balusters and rotting stringers
Before Unsafe Stair Structure
After: Brand new composite deck stairs with sturdy black aluminum handrails
After Solid Composite Stairs
Before: Small, outdated porch area with inadequate railing height
Before Outdated & Non-Compliant
After: Expansive new redwood deck built for family gatherings with mountain views
After Expansive Redwood Build

See the difference quality makes.

Our Story

A Handshake Still Means Something.

Larry Thornhill started framing decks in 1977. Back then, business was done on a promise, and a man's word was his bond. After 55 years in the trade, Larry still operates by that same code. He still walks every single job site personally, ensuring that the work meets the exact standard he'd demand for his own home.

At Thornhill Construction, we believe in sticking to the quoted price, showing up exactly when we say we will, and treating your property with absolute respect. When you hire us, you aren't getting a rotating cast of subcontractors. You're getting Larry, alongside his dedicated crew—Danny, John, and the team—who have worked together for years. They are part of the family, and they take immense pride in their craft.

"Thornhill Construction built my deck and back stairs about 2 years ago. I had to move my house and the movers did a horrendous job [but the deck held strong]." — Sheila S.

The Hard Facts

Headquarters

2428 Rising Hill Rd
Placerville, CA 95667

Call or Text

Primary: (530) 303-3950
Secondary: (530) 306-4629

License & Service Area

CSLB #336956 (Active, B General Building)
Serving El Dorado County, Placerville, Cameron Park, Shingle Springs, and surrounding foothills.

4.9★ 118 Reviews

Proudly holding a 4.9-star average on Angi and a BuildZoom score of 93, placing us in the top 27% of licensed contractors in California.

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