Custom Deck Builders in Mercer Island, WA

Trusted Outdoor Craftsmanship for Your Mercer Island Home

Petra Decks is proud to bring over 30 years of construction and framing experience to Mercer Island. As your local custom deck builders, we design and build outdoor living spaces that enhance your home’s beauty and function. Whether you're dreaming of a serene lake-view deck or a modern composite patio, our team delivers high-quality results you can enjoy for decades.

Why Homeowners in Mercer Island Choose Petra Decks

• Licensed, bonded & insured local deck contractor

• Custom deck designs tailored to your space & view

• Attention to detail, permitting, and HOA-friendly designs

• Composite & waterproof decking solutions

• Patios, railings, privacy screens & more

Real Projects, Real Inspiration

Check out our local portfolio to see decks we’ve built in Mercer Island and the surrounding Eastside communities. From lakefront retreats to elevated view decks, our projects are designed to impress and built to last.

Outdoor Living Solutions Designed for Mercer Island Homes

Composite & Cedar Decks

Enjoy elegant, long-lasting outdoor spaces with custom composite and cedar decks built to suit Mercer Island’s modern, coastal charm. We use top brands like Trex, TimberTech, and Fiberon for low-maintenance performance with a high-end finish—perfect for year-round enjoyment.

Patios & Covered Porches

From elevated covered porches with lake views to sleek stone patios for entertaining, our team designs and builds outdoor spaces that feel like a natural extension of your home—crafted with care, quality, and attention to detail.

Waterproof Underdeck Systems

Make the most of your elevated deck with our underdeck waterproofing systems, creating dry, functional areas below—ideal for storage, shaded seating, or protected walkouts. A smart solution for Mercer Island’s rainy seasons.

Composite Decking Experts on Mercer Island, WA

Durable, Low-Maintenance, and Beautiful Outdoor Spaces

At Petra Decks, we specialize in building composite decks on Mercer Island that combine long-lasting performance with stunning design. Whether you're upgrading your backyard or building a brand-new outdoor living space, composite materials offer a perfect balance of beauty and function.

Why Mercer Island Homeowners Choose Composite Decks:

• Built for the Pacific Northwest: Composite decking resists moisture, rot, and insects—ideal for Auburn’s rainy seasons.

• Low Maintenance: Forget sanding or staining—just a simple wash keeps your deck looking new year after year.

• Natural Look, Modern Performance: Choose from wood-like textures, rich colors, and finishes from top brands like Trex, TimberTech, and Fiberon.

• Eco-Friendly: Made from recycled wood and plastic, composite decking helps reduce waste without compromising on style.

Tailored Composite Deck Design & Installation

We’ll work closely with you to design a custom deck that fits your home, lifestyle, and budget. Whether you're envisioning a cozy space for family BBQs or a large multi-level retreat, we’ll bring your vision to life with premium composite materials.