

Alliance Deck Builders of Berlin brings professional design, local code knowledge, and proven materials to every project. We specialize in decks that withstand the deep freezes and heavy snow loads common in Coös County. From lakeside sunrooms to backyard grilling decks, we offer full-service outdoor construction—designed to last through New Hampshire’s toughest seasons.

How Can We Help?
We listen, we measure, and we build with purpose. Whether your deck will face river humidity or hillside winds, our team understands what works—and what doesn’t—in Berlin’s unique terrain and climate. No cookie-cutter designs here—just smart, sturdy craftsmanship that adds value to your property.
Cold-weather framing & footings built to code
All permits & inspections handled locally
Composite, cedar & pressure-treated options

In Berlin, the season is short—but we make it count. Our crews are trained to work through colder months when conditions allow, using heated footing techniques and cold-rated materials. Whether it’s a re-decking project in March or a new sunroom in late fall, we help homeowners make the most of every buildable window.

Every deck in Berlin faces snow loads, freeze-thaw cycles, and shifting terrain. We use pressure-treated lumber rated for northern climates, hidden fasteners that won’t rust, and decking materials that grip—even when wet. From rooftop restaurants to backyard hot tub surrounds, safety and code compliance come first.
Your deck should match the way you live—whether that’s sipping coffee on a screened porch or grilling dinner in a full outdoor kitchen. We design every structure around your routines, style, and future use. Add lighting, storage, pergolas, or custom steps—we’ll build it right the first time.


Madison Avenue: Wide backyards here offer room for multi-zone decks—grilling areas, seating nooks, and pergolas are all popular features on these properties.

Jericho: Known for its elevated lots and recreational access, decks here must be built with strong footings and weatherproof materials that stand up to the elements.

Cascade: Decks here must handle elevated wind exposure and winter drifting—our crews reinforce railing systems and build with high snow loads in mind.
Don't worry, we can help!
As a locally operated branch of Alliance Deck Builders, our Berlin team brings deep knowledge of northern New Hampshire’s building codes, weather patterns, and terrain. We’ve completed dozens of projects from Main Street to Jericho Mountain—each one designed for the climate and built to last. Whether it’s your primary home, camp, or business, we treat your project with the same level of detail and professionalism. Our Berlin crews are licensed, insured, and known for clean job sites and dependable timelines.
We’re not just residential deck builders. In Berlin and surrounding towns, we’ve built outdoor seating for restaurants, break areas for commercial facilities, and rooftop lounge decks for apartment complexes. Our experience with code compliance, structural engineering, and commercial permits makes us a smart partner for property managers and business owners alike.
From frost depth requirements to HOA approvals, homeowners in Berlin often have specific questions. Here are some quick answers from our team on the ground.
We specialize in hillside framing. Our team uses stepped footing systems and reinforced support beams for stability and longevity.
Yes. We manage all permitting and inspections through the Berlin city office, and we include stamped plans when required.
Composite decking is ideal for moisture and freeze-thaw resistance, but we also build pressure-treated and cedar decks for traditionalists.
We specialize in hillside framing. Our team uses stepped footing systems and reinforced support beams for stability and longevity.

Tailored decks for your home’s layout, style, and terrain.

Trex, TimberTech & more—designed for durability and style.

Classic materials built to handle New England’s seasons.

Safe, stable, and code-compliant solutions for aging decks.

Sanding, staining, and sealing to revive wood decks.

Tiered designs for slopes, pools, or outdoor entertaining.

Add square footage or upgrade boards without full rebuild.

Shade and shelter built into your deck design.

Enjoy fresh air without bugs or weather interference.

Fully integrated cook spaces for outdoor living.

Elegant structures for shade, beauty, or plant support.

Slip-resistant, stylish, and safe wet-area decks.

Fully framed, code-compliant outdoor buildings.

Safe, stylish railing and stair solutions.

Rooftops, restaurants, patios & hospitality spaces.

Innovation
Fresh, creative solutions.

Integrity
Honesty and transparency.

Excellence
Top-notch services.
From planning and permitting to the final nail, we’re here to help you build a deck that fits your home, lifestyle, and location. Call Alliance Deck Builders of Berlin today to schedule a free consultation—or fill out our quote form and we’ll be in touch within 24 hours.

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