Sheds & Outbuildings

Custom timber garden structures. From solid concrete bases to fully insulated home offices and functional storage buildings.

Our Quotation Process

Customer Journey

CUSTOM TIMBER STRUCTURES

Bespoke Garden Rooms and Outbuildings Built for Purpose.

Modern life often requires more space than the original footprint of a house allows. At BAS, we design and construct premium timber outbuildings that serve as high-end extensions of your home. Whether you need a secluded, soundproofed home office, a private garden gym, or a bespoke workshop, our structures are built to the same exacting standards as a primary residence, featuring full insulation and high-performance glazing.

Bespoke architectural design tailored to your garden’s layout.
Fully insulated walls, floors, and roofs for year-round use.
Professional electrical and high-speed data integration.
Premium cladding options including Cedar, Larch, and Composite.

We manage the entire build from the ground up, starting with a precision-leveled concrete or timber-frame base. Our outbuildings are designed to be “plug-and-play,” meaning we handle the trenching for power, internal lighting, and heating. We focus on creating a structure that complements your garden’s aesthetic while providing a comfortable, climate-controlled environment that feels like a natural part of your living space.

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THE OUTBUILDING SPECIALISTS

Engineering Luxury Into Every Timber Structure.

A garden room is a structural investment, not just a temporary addition. BAS Building & Associated Services applies professional construction techniques—from vapor barriers to structural roofing—to ensure your outbuilding remains dry, warm, and structurally sound for decades.

Year-Round Use

We use residential-grade insulation and double-glazing to ensure your studio is a comfortable workspace in any season.

Premium Finishes

Selection of high-durability external claddings that age beautifully and require minimal maintenance over time.

Full Utility Link

Expert installation of power, heating, and hardwired internet to turn your garden room into a fully functional office or gym.

Solid Foundation

Every outbuilding is set on an engineered base to prevent moisture rise and ensure perfect structural alignment.

The best outbuildings don’t feel like sheds—they feel like sanctuaries. We focus on the interior climate and the quality of the timber joints to ensure your garden room is a space you actually want to spend time in every day. — BAS Site Director

As part of our complete Garden Repair & External Works we provide:

From robust structural boundaries to premium hard landscaping, BAS delivers high-specification outdoor solutions tailored to enhance your property’s curb appeal and functionality.

Sheds & Outbuildings

Bespoke Timber Garden Structures

Patios, Paving & Decking

Premium Hard Landscaping Solutions

Garden Walls & Groundworks

Structural Garden Masonry Services

Fencing & Gates

High-Quality Boundaries

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WHY CHOOSE US

The benefits of choosing Building & Associated Services

We deliver technical precision, full UK compliance, and expert project management, ensuring your structural renovations are built to last.

Detailed, transparent pricing
Comprehensive Liability Insurance
Guaranteed products and workmanship
Portfolio of project case studies
Member of The Federation of Master Builders
Professional build schedules
Every project is managed in-house
One-stop shop for building and carpentry
Dedicated Customer Relations Managers
Outstanding client testimonies and reviews
Bespoke design, manufacture, and installation

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Need to know how much your cost?

CLIENT TESTIMONIALS

Delivering Excellence
Through a Dedicated Team.

“ The team at BAS Building transformed our dated kitchen into a stunning open-plan living space. Their attention to detail, especially with the structural steelwork and glazing, was second to none. They were energetic, professional, and kept the site incredibly clean throughout the entire build. We couldn't be happier with our new home. ”

James Sterling

Homeowner, Surrey

“ I hired BAS for a complex loft conversion that required a lot of custom carpentry. Robert and his team were a breath of fresh air; they provided creative solutions to structural issues and finished the woodwork to a cabinet-maker’s standard. It’s rare to find a building company that cares this much about the fine details. ”

Sarah Jenkins

Property Developer

“ Building a house is stressful, but BAS Building made it feel manageable. Their project management is top-tier—they coordinated every trade perfectly and stayed exactly on budget. Their 'energetic team' isn't just a slogan; they truly worked with passion to get us into our home ahead of schedule. Highly recommended! ”

David Thompson

Private Client

A Comprehensive Suite of Building & Carpentry Services.

From large-scale structural engineering to bespoke interior timber craftsmanship, BAS delivers high-specification solutions tailored to your property’s unique requirements.