Built for Storage, Projects, and All-Season Durability

Detached Garages & Sheds in New Hampshire

More Than Storage These Builds Work for You

Custom Garages & Sheds for Real-World Use

Our detached garages and sheds aren’t cookie-cutter kits. We design each structure to suit your goals — from car storage and lawn equipment to heated workshops and loft spaces. We match rooflines, siding, trim, and windows to your home for a cohesive look. With snow-rated framing, secure doors, venting, and insulation options, these buildings are made to handle New Hampshire winters and last for decades.

What’s Included in Our Garage & Shed Builds

Framing, Foundations & Finishes That Hold Up

From simple utility sheds to multi-vehicle garages with lofts or workbenches, we build from the ground up with durable materials and local code knowledge. That includes poured footings, anchored walls, vented roofing, and optional upgrades like insulation, wiring, or windows. Every structure is fully framed — no pre-fab kits — and designed for function, storage, and curb appeal.

Framing rated for snow and wind loads

Options for windows, lighting, and doors

Poured slab or pressure-treated floor systems

Detached two-car garage with matching siding and trim next to a New Hampshire home

Sized and Styled for Your Property

Custom Layouts to Fit Your Lot, Needs & Budget

Every garage or shed starts with your goals and available space. Need an oversized structure for workshop space? We’ll frame it for tools, storage, and even heat. Short on space? We’ll design a compact shed or single-bay garage that fits your yard without crowding. Our team reviews local zoning setbacks, HOA rules, and access requirements to build a structure that’s practical, legal, and visually cohesive.

Custom-built backyard shed with gable roof and painted trim blending with New Hampshire home

Why Homeowners Choose Alliance

Built from the Ground Up, Not Out of a Box

We’re not in the prefab shed business. At Alliance, we build garages and outbuildings like we build decks — one board, beam, and rafter at a time. We use full framing, pressure-treated or slab foundations, and snow-rated roofing systems. Doors, siding, windows, and trim are all customized to match your home, so your new building looks like it belongs. It’s craftsmanship, not cookie-cutter.

Add-Ons That Add Real Function

Upgrade Options for Every Use Case

We offer more than walls and a roof. Want power tools inside your garage? We'll add outlets and lighting. Need a garden shed that doesn’t overheat? We'll build in vents and optional insulation. Looking for long-term value? Ask about lofts, ramps, double doors, or attached lean-tos. Every structure we build is upgrade-ready — so you’re not locked into basic storage if you need more down the road.

Storage shed with loft and double doors set on gravel pad with vented gable roof in NH

Why Build With Alliance?

Keyword: dolor sit amet consectetur. Aliquam odio enim pharetra et. Diam varius magna lobortis consequat id pharetra. At ac eu nulla faucibus ullamcorper. Elit varius malesuada egestas pretium eget sit bibendum urna scelerisque.

Keyword: dolor sit amet consectetur. Aliquam odio enim pharetra et. Diam varius magna lobortis consequat id pharetra. At ac eu nulla faucibus ullamcorper. Elit varius malesuada egestas pretium eget sit bibendum urna scelerisque.

Designed to Match Your Home: Siding, rooflines, and paint options create a seamless look.

Add Loft, Power, or Workbenches: We build for tools, storage, and all-season function.

Built to Code, Start to Finish: We manage permits, zoning rules, and inspections.

Don't worry, we can help!

A Smarter Shed or Garage Starts with the Right Plan

We build around how you’ll actually use the space — not just how it looks. If you need a potting shed with counter space, a two-bay garage with power tools, or a basic structure that meets HOA height limits, we’ll plan for that. From footprint to finish, every build is tailored for utility, safety, and performance — and always backed by our full-service process.

Pitched or flat roofs based on drainage & style

Framed-in doors sized for your equipment

Add lighting, power, insulation, or shelving

Engineered to Stay Dry, Strong & Secure

Foundation, Framing & Roofs Built for NH Weather

We build every shed and detached garage like it’s staying put because it is. Our footings are anchored deep and rated for frost heave. We use vented roof designs, properly flashed wall joints, and weather-rated siding to keep moisture out. From poured slabs to treated wood bases, every element is selected for strength and longevity in New Hampshire’s climate.

Frequently Asked Questions

Detached Garages & Shed FAQs

No pushy sales, no cookie-cutter plans just honest work and well-built outdoor spaces. Alliance Deck Builders of New Hampshire is here to help you plan and build something that works for your space, your budget, and your life. We’re ready when you are let’s make your backyard something better.