Outdoor Living Starts Here
Deck Builders in New Hampshire
Alliance Deck Builders of New Hampshire transforms outdoor spaces with handcrafted decks, screened porches, and custom patio structures designed to thrive in New England's seasons. Whether you're planning a peaceful backyard retreat or an entertainer's dream deck, our team brings deep experience, premium materials, and local knowledge to every project. From Nashua to Berlin, we build to last—always with comfort, safety, and beauty in mind.
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Build It Right the First Time
Local Craftsmanship You Can Count On
When you hire Alliance Deck Builders of New Hampshire, you’re not just hiring a contractor—you’re gaining a local partner who understands regional codes, HOA guidelines, and what materials hold up best through long winters and humid summers. Our crew is licensed, fully insured, and trained in structural safety, composite system installation, and wood preservation techniques. Every project begins with a consultation and ends with a walk-through you’ll feel proud to show off.
Custom-Built Decks
Premium Materials Only
Licensed & Insured Crews
Serving All of New Hampshire
Explore Our Recent Builds
Custom Deck Projects Across New Hampshire
Each deck we build is a reflection of your vision, the environment around it, and our commitment to quality. From spacious multi-level platforms to cozy screened-in porches, our portfolio showcases the variety and craftsmanship we bring to every project. Browse below to see how we bring New Hampshire backyards to life.
The Alliance Difference
Why Homeowners Trust Our Team
We don’t believe in shortcuts. Our work begins with a detailed design consultation and ends only when you’re 100% satisfied. Whether you’re building a new cedar deck or upgrading to composite, our process is honest, collaborative, and built around your needs. We back our work with clear timelines, open communication, and options that suit both budget and vision.
Free on-site estimates within 48 hours
All projects built to IRC deck code standards
5-year labor warranty on all installations
Full-Service Outdoor Construction
Our Deck & Outdoor Living Services
Custom Deck Design & Construction
Tailored decks for your home’s layout, style, and terrain.
Composite Deck Installation
Trex, TimberTech & more—designed for durability and style.
Wood Deck Building
Classic materials built to handle New England’s seasons.
Deck Repair & Structural Reinforcement
Safe, stable, and code-compliant solutions for aging decks.
Deck Restoration & Refinishing
Sanding, staining, and sealing to revive wood decks.
Multi-Level Deck Construction
Tiered designs for slopes, pools, or outdoor entertaining.
Deck Extensions & Re-Decking
Add square footage or upgrade boards without full rebuild.
Covered Decks & Patio Roofs
Shade and shelter built into your deck design.
Screened-In Porches & Sunrooms
Enjoy fresh air without bugs or weather interference.
Outdoor Kitchens & Grilling Stations
Fully integrated cook spaces for outdoor living.
Pergolas, Gazebos & Arbors
Elegant structures for shade, beauty, or plant support.
Pool Deck & Hot Tub Surrounds
Slip-resistant, stylish, and safe wet-area decks.
Detached Garages & Sheds
Fully framed, code-compliant outdoor buildings.
Custom Deck Railings & Stairs
Safe, stylish railing and stair solutions.
Commercial Deck Projects (Restaurants, Rooftops, etc.)
Rooftops, restaurants, patios & hospitality spaces.
Built for New England Conditions
Decks That Withstand Harsh Weather
From heavy snowfall in Berlin to humid summers in Nashua, we understand what New Hampshire weather demands of outdoor structures. We use moisture-resistant lumber, code-rated fasteners, and proven framing techniques to ensure your deck holds up against freeze-thaw cycles, wind loads, and UV exposure. Our team also designs with water runoff and snow loads in mind—key considerations many out-of-state contractors miss.
Design to Last, Built to Enjoy
Craftsmanship That Elevates Your Space
Every deck starts with a plan that reflects your vision and how you want to use the space. Whether you’re envisioning a grilling station, built-in lighting, or a quiet spot for reading, our designers tailor every angle and material to your preferences. Then our licensed builders make it real—with careful footing placement, tight joinery, and weather-smart finishes. We don’t just meet code—we exceed it.
HOA? No Problem.
Navigating Local Rules & Permits
We stay current on town and HOA requirements in areas like Derry, Rochester, and Laconia. From setback clearances to railing heights and material approvals, we handle the paperwork and ensure your deck is compliant before the first post goes in. We’ll also coordinate with inspectors and provide stamped plans when required, giving you peace of mind and hassle-free approval.
How We Build Every Deck Right
Consult & Design
We start with a free on-site consultation, walking the property with you to understand your goals, measurements, and any HOA or permit concerns. You’ll receive a custom layout and quote within 48 hours.
Build & Communicate
Once approved, we schedule your project and keep you informed every step of the way. Our licensed crew handles footings, framing, surfacing, and finishes—meeting code and exceeding expectations.
Final Walkthrough
After we clean up and complete your deck, we’ll walk you through every detail. We explain care, warranty, and ensure you’re 100% satisfied before we call it done.
Ready to get started?
What Sets Us Apart
Veteran Local Crews:All installers are trained, licensed, and live right here in New Hampshire.
Premium Materials Only: We use trusted brands like Trex, TimberTech, and cedar built to handle real seasons.
Transparent Pricing: No games. Every quote includes labor, materials, and cleanup—no surprises.
Permit & Code Experts: From setbacks to snow loads, we handle local regulations so you don’t have to.
Trusted by Homeowners: Dozens of 5-star reviews from clients across Concord, Manchester, and beyond.
Don't worry, we can help!
We Work with these Brands of Materials
Questions? We’ve Got Answers
Frequently Asked Deck Questions
Homeowners across New Hampshire often ask us about deck timelines, permits, and materials. If you're planning a new build or renovating an older structure, knowing what to expect makes a big difference. We’ve compiled a few of the most common questions to help you plan confidently and avoid surprises during your deck project.
How long does it take to build a new deck?
Most decks are completed in 1–2 weeks after permits are approved, depending on size, weather, and design complexity.
Do you help with permits and inspections?
Yes. We handle permitting and schedule inspections for you, following all local and state codes in New Hampshire.
What’s the difference between composite and wood?
Composite resists moisture and fading, while wood offers a classic look but requires more upkeep. We’ll help you compare options.
Can you build decks in the winter?
Yes—if frost lines and weather allow. Winter projects often move faster due to lower permit backlogs and scheduling availability.
Why New Hampshire Homeowners Choose Us
From Berlin to Nashua, our reputation is built one board at a time. We don’t just install decks—we build outdoor spaces that make your home more enjoyable year-round. Our team focuses on safety, code compliance, and design that blends with your home’s character. Whether you need a family grilling area or a quiet retreat, we’re here to deliver results you can trust.
Fully licensed and insured across all NH counties
Detailed proposals with zero hidden fees
5-star reviews from dozens of local homeowners
Innovation
Fresh, creative solutions.
Integrity
Honesty and transparency.
Excellence
Top-notch services.
Proudly Serving Cities Across New Hampshire
Choose the city closest to you!
Your Backyard Upgrade Starts with a Conversation
Ready to build the deck you’ve always wanted? Let’s talk. Alliance Deck Builders of New Hampshire offers free estimates, friendly service, and expert craftsmanship from day one. Give us a call or fill out our quote request form today—your future favorite space is just a few steps away.
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