

Engineered for Portland Rain & Sun
We build decks for the Pacific Northwest climate—rain, sun, wind, and wet ground. With pressure-treated frames, composite boards, and proper drainage, your deck won’t sag, mold, or rot. From porches to platforms to rooftop decks, our builds hold strong and stay beautiful.

How Can We Help?
We manage layout, engineering, permits, materials, and building—all in-house. No subs. No surprises. Whether you want a ground-level patio deck, rooftop hangout, or ADA-compliant porch, we get it done cleanly, on time, and up to Portland code.
Composite, cedar & pressure-treated decks
Covered porches, rooftop decks & pergolas
Custom stairs, ramps, ADA decks & railings

Whether your property is in the City of Portland, Multnomah County, or an HOA-restricted zone, we manage all permits and code requirements. From fire setbacks to height limits and access clearances, your project will be approved fast and built right.

We build for long wet seasons, freeze-thaw cycles, and summer sun. Every deck includes sealed framing, weather-rated fasteners, and breathable spacing for proper drainage. Whether you're installing a cozy front porch or a full multi-zone outdoor living space, it’s built to stay solid and safe.
We build decks for classic bungalows, narrow infill lots, and modern hillside homes. Whether you’re in SE, NW, or the West Hills, we create a design that fits your layout and look—whether that means rooftop access, stair landings, or multiple levels to navigate slope and grade.


Sellwood-Moreland: Porch decks and elevated platforms are common here—often with historic details and ADA upgrades.

Alberta Arts District: Urban decks here maximize small lots with rooftop designs, planter boxes, and compact seating zones.

West Hills: We specialize in slope-adapted builds here—multi-level decks with view access, privacy rails, and stairways.
Don't worry, we can help!
Alliance Deck Builders of Portland designs and constructs decks for every home style and slope. From porch rebuilds in older neighborhoods to modern rooftop platforms and commercial patios, we bring Portland-specific code knowledge, regional materials, and smart engineering to every job.
We build for homeowners, property managers, and businesses across the metro. Whether it’s a rental porch in North Portland, a rooftop deck in the Pearl, or an ADA platform in Southeast, our builds meet your needs and pass inspection—fast.
Portland Deck Building FAQs
Answers to Local Property Owner Questions
Here’s what Portland clients usually ask before starting a deck project with us.
Yes. We handle all permitting with the city or county and ensure fast approvals.
Composite with sealed, pressure-treated framing is ideal for Portland's rainy season.
Absolutely. We specialize in rooftop, sloped, and narrow-space deck designs.
Most decks are finished in 2–4 weeks once permits are secured and weather allows.

Tailored designs that match your space, vision, and budget—built to last and code-compliant from day one.

Low-maintenance decking in top brands like Trex and TimberTech, resistant to fading, warping, and moisture.

Classic wood decks using durable cedar or pressure-treated pine for beauty and budget-friendly performance.

From loose rails to sagging joists, we restore safety and stability with expert inspections and repairs.

Bring your old deck back to life with sanding, staining, board replacement, and sealing services.

Tiered decks for sloped yards or high elevations—engineered for access, drainage, and scenic views.

Expand or re-surface existing structures with new materials and added square footage—without full teardown.

Protect your space from sun and rain with gable, shed, or flat roof additions built to match your home.

Bug-free outdoor spaces or four-season comfort, built with framing, screens, windows, and insulation.

Deck-based kitchens with built-in grills, sinks, and prep space for serious backyard cooking.

Custom shade structures built standalone or on your deck—cedar, vinyl, or composite options available.

Moisture-resistant decks designed for safety and slip resistance around water features.

Fully framed outbuildings designed to store tools, lawn gear, or serve as workshops or guest suites.

Choose from wood, metal, cable, or composite rail systems—plus safe and stylish stair designs.

Built to code and designed for business—rooftops, patios, and seating decks for commercial spaces.

Innovation
Fresh, creative solutions.

Integrity
Honesty and transparency.

Excellence
Top-notch services.
Let’s Build Your Portland Deck
Alliance Deck Builders of Portland brings experience, design skill, and code knowledge to every job. Whether you’re looking to add outdoor living space or rebuild a porch, we’re ready to help. Contact us today to start with a free, no-obligation consultation.

503-406-6236
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