Garage Conversions

Efficiently converting garages into functional living spaces. We manage everything from floor insulation and ventilation to habitable room certification.

Our Quotation Process

Customer Journey

RECLAIM YOUR SPACE

Transforming Underutilised Garages Into Premium Living Areas.

A garage conversion is one of the most cost-effective ways to add high-value internal square footage to your home. Whether you need a secluded home office, a high-tech cinema room, or a ground-floor guest suite, BAS Building specialises in seamless internal transformations. We focus on matching your existing exterior brickwork and window styles so that the finished conversion looks like an original part of the architecture, not an afterthought.

Full thermal floor, wall, and roof insulation upgrades.
Brick-matching and bespoke glazing to suit your home.
Damp-proofing and structural floor slab reinforcement.
Seamless integration with your home’s central heating.

We handle the technical complexities of converting a cold utility space into a building-regulations-compliant room. From replacing the garage door with high-performance masonry to managing the electrical and plumbing requirements for a new ensuite, our team ensures a fast, efficient turnaround with minimal disruption to your driveway or daily routine.

VIEW OUR PORTFOLIO

THE CONVERSION EXPERTS

Smart Internal Reconfiguration For Modern Lifestyles.

Converting a garage is about more than just a new floor; it’s about a technical transition from a storage area to a habitable environment. BAS Building brings precision engineering to every conversion, ensuring your new room is warm, quiet, and perfectly integrated into your home's layout.

In-Fill Masonry

Professional brick-matching and window installation to replace your old garage door with a seamless facade.

Utility Integration

Full MEP services to integrate lighting, high-speed data, and plumbing for bathrooms or utility rooms.

Thermal Comfort

We exceed standard insulation requirements to ensure your new room stays warm in winter and cool in summer.

Floor Levelling

We specialise in damp-proof membranes and raised flooring to ensure your new space is perfectly level with your house.

The challenge of a garage conversion is making it feel like it was never a garage. We focus on floor levels, ceiling heights, and natural light to ensure the transition is invisible and the quality is unmatched. — BAS Site Director

As part of our complete Building Services we provide:

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

Structural Alterations

Precision Structural Engineering

Property Refurbishments

Complete Interior Modernisation

Loft Conversions

Elevating Your Home’s Potential

House Extensions

Expanding Your Living Space

Groundworks & Foundations

Building On Solid Grounds

Garage Conversions

Functional Room Transformations

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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.