Loft Conversions

Professional Dormer and Velux conversions. Turn underutilised attic space into high-quality habitable rooms, fully compliant with UK fire and insulation regulations.

Our Quotation Process

Customer Journey

ELEVATE YOUR PERSPECTIVE

Unlocking Hidden Potential With Bespoke Loft Conversions.

A loft conversion is the most efficient way to add a luxury master suite or a quiet home office without sacrificing your outdoor garden space. At BAS, we specialize in transforming dusty attics into bright, habitable rooms that feel like a natural extension of your home’s original footprint. We focus on clever stair designs and innovative storage solutions to ensure no inch of your new floor is wasted.

Bespoke staircase design to maximize landing space.
Specialists in Velux, Dormer, and Hip-to-Gable conversions.
Enhanced thermal insulation and soundproofing standards.
Complete fire safety and building control certification.

From reinforcing floor joists to installing custom-fitted wardrobes under the eaves, our team handles the unique challenges of attic construction. We work primarily from the exterior where possible to minimize dust and disruption inside your main living areas, delivering a high-end finish that looks as though it was always part of the house.

VIEW OUR PORTFOLIO

THE LOFT SPECIALISTS

Vertical Expansion Driven By Intelligent Design.

Converting a loft requires a different set of skills than a ground-floor extension. It’s about working within the existing constraints of your roofline to create a sense of volume and light. BAS Building brings a decade of experience in navigating the specific structural and planning hurdles of attic transformations.

Space Optimization

We design custom staircases that meet building regulations while preserving as much room as possible on the floor below.

Structural Safety

Expert installation of tele-beams or floor reinforcements to handle the new weight load without compromising the ceiling below.

Natural Light

Strategic placement of Velux windows or glass-fronted Dormers to flood your new room with daylight and improve ventilation.

Permitted Development

We handle all paperwork, ensuring most conversions fall under Permitted Development for a faster, hassle-free start.

A loft shouldn’t just be an extra room; it should be the best room in the house. We focus on the details—like head-height clearance and integrated eaves storage—to turn tight spaces into luxury living. — 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

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

Request a Free Estimate

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.