Space You Need, Built to Last

Detached Garages & Sheds in Montana

Storage, Shop Space, or Something In Between

What We Build And What It’s Built For

Our detached structures range from basic storage sheds to multi-bay garages with room for ATVs, snowmobiles, and full-size vehicles. Need a garden shed? We’ll match your home’s style and add venting, shelving, or even windows. Want a full-scale garage with electric, insulation, and loft space? We’ll design it to fit your lot and your lifestyle. Every structure is engineered for snow load and built to meet or exceed Montana’s building codes.

More Than Storage These Are Real Structures

Detached Buildings That Fit and Function

We don’t build kits we build real, framed structures with long-term performance in mind. Whether it’s a backyard garden shed, a firewood shelter, or a multi-car garage with workshop space, every building starts with proper planning and solid materials. Our Montana-built garages and sheds include options for slab or pier foundations, ventilation, custom doors, and energy-smart finishes.

  • Framed, insulated, and built to local code

  • Snow-rated roofs, vented soffits, and weather-sealed siding

  • Add-ons like lofts, shelving, or workspace available

Detached two-car garage with loft and matching siding to home in Montana

Custom-Built, From Site Prep to Final Trim

How We Build Long-Lasting Montana Outbuildings

We start with a site visit and layout plan making sure your new shed or garage fits your yard, setbacks, and goals. From there, we prep the foundation, frame to spec, install durable siding and roofing, and finish with doors, windows, and trim. You pick the size, style, and materials. We handle the build, the permits, and the final walkthrough.

Backyard shed built to match house siding and roof pitch on Montana property

Sized and Styled to Fit Your Lot

Small Sheds to Oversized Garages We Build It All

We design sheds and garages to work with your space not overwhelm it. Need a compact garden shed under 120 sq ft? Done. Want a two-bay garage with an attic loft and workshop? We’ll draft plans to match your needs, zoning, and site layout. Every project includes proper drainage, access planning, and snow-rated structure design. You tell us how you want to use it we’ll build it right.

No Subcontract Runaround Just Turnkey Builds

We Handle Design, Permits, and Full Construction

Montana weather means you need timelines that stick. That’s why we manage every phase of construction in-house or with trusted local partners. From site prep and concrete to framing, siding, and overhead doors, we deliver start-to-finish service with no finger-pointing. You’ll get a dedicated build schedule, clear communication, and one local team responsible for it all.

Garage construction crew pouring concrete slab and prepping for framed walls in Montana

Why Montana Trusts Us for Garage and Shed Builds

  • Custom Floor Plans: You choose the size, doors, roof, and storage layout.

  • Built for Snow Load: Every structure framed and roofed to handle Montana winters.

  • Foundation to Finish: We manage concrete, framing, roofing, and trim.

  • Permit-Ready Plans: We draw and submit all plans to meet local code.

  • Fit to Match Your Home: Roofing, siding, and colors aligned with your house or cabin.

Don't worry, we can help!

Secure, Durable, and Built to Fit

A well-built shed or garage gives you more than just space—it gives you peace of mind. Whether you’re storing tools, winter gear, vehicles, or firewood, our structures keep things safe, dry, and out of your main living space. We build them to handle Montana’s seasons—and to look like they belong on your property.

  • Add-ons like windows, attic space, or lighting available

  • Works great for workshops, toy storage, or garden tools

  • Blends with existing home style and scale

From Flat Lots to Hillsides We Build to Fit Your Site

Montana-Grade Sheds and Garages That Last

We build every shed and garage to suit Montana terrain and elevation. That means deeper footings, frost protection, weather-rated siding, and snow-shedding roofs. Whether your property is in the valley, on a slope, or exposed to high winds, we engineer each outbuilding for performance, access, and longevity. It’s not just a box it’s a structure designed for your land.

What to Know Before Building a Garage or Shed

Montana Garage & Shed FAQs

Here are answers to the most common questions we get about detached garages and outbuildings across Montana:

Do I need a permit for a detached garage or shed?

Most of the time, yes especially for anything over 200 sq ft or with utilities. We handle the entire permitting process.

Can you match the siding and roof to my house?

Absolutely. We match materials, colors, pitch, and trim for a seamless look.

What kind of foundation is required?

We offer slab, pier, or compacted gravel depending on structure size and use.

How long does construction take?

Most sheds are done in 1–2 weeks. Garages can take 3–6 weeks depending on size and weather.

We Do More Than Sheds and Garages

Explore Our Full Outdoor Construction Services

Custom deck design and construction in Montana

Deck Design & Construction

We design and build custom decks tailored to your home, lifestyle, and outdoor space—built for comfort, code, and long-term value.

Composite deck installers using Trex and TimberTech in MT

Composite Deck Installation

Durable, low-maintenance decking in brands like Trex and TimberTech. We install with expert framing and clean finishes.

Cedar and pressure-treated deck builders in Montana

Wood Deck Building

Traditional wood decks built from cedar or pressure-treated lumber, sealed for longevity and built with care.

Structural deck repair and joist replacement in Montana

Deck Repair & Structural Reinforcement

We replace rotted joists, tighten loose rails, and restore sagging stairs—bringing your deck back to safe, usable shape.

Deck refinishing and restoration services in Montana

Deck Restoration & Refinishing

We clean, sand, and seal old decks to restore natural color and extend the life of your outdoor space.

Multi-level decks for sloped terrain in Montana

Multi-Level Deck Construction

Tiered decks add dimension and function. We build secure, attractive multi-level systems with unified stairs and rails.

Re-decking and deck extension services in Montana

Deck Extensions & Re-Decking

We extend existing decks or replace worn boards with modern composite or sealed wood—saving the foundation when possible.

Covered decks and patio roofs built in Montana

Covered Decks & Patio Roofs

From pergola-style shade to full patio roofs, we protect your deck space from rain, sun, and snow with stylish coverage.

Screened porches and sunrooms installed in Montana

Screened-In Porches & Sunrooms

Enjoy fresh air without the bugs. We build screened rooms and glass-walled sunrooms for relaxing in all weather.

Custom outdoor kitchens and BBQ decks in Montana

Outdoor Kitchens & Grilling Stations

We build grilling areas, outdoor sinks, and kitchen setups into decks—complete with fire-safe materials and smart layout.

Pergola and gazebo builders for Montana homes

Pergolas, Gazebos & Arbors

Add architectural charm and functional shade with custom pergolas, gazebos, or arbors—built freestanding or integrated.

Pool decks and hot tub platforms built in Montana

Pool Deck & Hot Tub Surrounds

Slip-resistant, water-safe decks designed to wrap hot tubs or pool edges with beauty and durability.

Detached garages and custom sheds in Montana

Detached Garages & Sheds

We construct code-compliant outbuildings including garages, workshops, and storage sheds with matching exterior finishes.

150-char Text: Safety meets style with cable rails, privacy panels, and reinforced stair systems.

Custom Deck Railings & Stairs

We fabricate and install deck railings and stairs to match your design goals and meet local safety codes.

Commercial and rooftop deck builders in Montana

Commercial Deck Projects (Restaurants, Rooftops, etc.)

From rooftop lounges to restaurant patios, we build commercial-grade decks that handle heavy use and meet ADA compliance.

Icon showing shed with pitched roof and front door

Innovation

Fresh, creative solutions.

Icon showing garage layout with dual doors and loft

Integrity

Honesty and transparency.

Icon showing blueprint with outbuilding permit stamp

Excellence

Top-notch services.

Ready to Build? Let’s Talk Decks

Whether you're looking to add a sun-soaked patio, rebuild a storm-damaged deck, or design a multi-level masterpiece, we’re ready to help. Alliance Deck Builders of Montana brings expertise, materials, and trust to every job no matter the size. Contact us today to schedule your free consultation and let’s bring your outdoor vision to life.

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