Building Group is Bicester's premier loft conversion company. We combine architectural expertise with master craftsmanship to deliver superior results.
Get Your Free Bicester QuoteSee what your Bicester neighbours say about our loft conversion work.
"My husband is finally out of the living room and into his new man-cave! Thank you Building Group for saving my sanity in Bicester!"
"They managed the party wall agreement with our Bicester neighbors professionally. The whole street was impressed with their cleanliness."
"Professional service from start to finish. Our hip-to-gable conversion has added so much space to our Bicester home. Quality workmanship."
"If you want a loft in Bicester, just book these guys. Seriously. Don't waste time with anyone else. Building Group is the real deal."
"Finally, a builder who turns up when they say they will! Restored my faith in tradesmen. Top job in Bicester."
"Building Group transformed our Bicester property's unused loft into two beautiful bedrooms. Excellent communication throughout and competitive pricing."
See more genuine Bicester customer reviews and loft conversion project galleries.
Read More ReviewsTransform your Bicester property's unused loft space into beautiful, functional living areas with our professional loft conversion services. Whether you need an extra bedroom, home office, or playroom in Bicester, we create bespoke solutions tailored to your lifestyle.
Our experienced Bicester team handles every aspect of your loft conversion project. From initial design and planning permission through to final decoration, we ensure your Bicester conversion maximizes space, natural light, and property value.
Choose the perfect conversion type for your Bicester property to maximize space and value
The most cost-effective option for Bicester properties using roof windows for natural light. Perfect for Bicester homes with adequate headroom.
Add valuable floor space and headroom to your Bicester property with single or multiple dormers. Popular choice in Bicester for space optimization.
Transform sloping hip roofs into vertical gable walls in your Bicester home, significantly increasing usable floor space. Ideal for Bicester semi-detached properties.
The premium option for Bicester properties creating maximum space with near-vertical walls. Perfect for period properties in Bicester.
Your Bicester property needs minimum 2.3m headroom at the highest point and sufficient floor area for conversion. Our Bicester specialists provide free assessments to determine if your loft is suitable and advise on the best conversion type for your Bicester property and budget. Most Bicester conversions fall under permitted development rights, but we handle all planning and building regulations applications where required.
Most terraced and semi-detached homes in Bicester have a 40-50 cubic meter allowance for roof extensions without full planning permission. We handle all Lawful Development Certificate applications for you.
Every conversion we build is inspected by approved inspectors to ensure compliance with Part B (Fire Safety) and Part L (Insulation) of the building regulations specific to Bicester housing stock.
Living in a terraced or semi-detached house in Bicester? We manage the Party Wall Notice process with your neighbors to ensure works can start on time.
Comprehensive evaluation of your Bicester loft space, structural assessment, and advice on the best conversion type for your property.
Architectural drawings, 3D visualizations, and planning permission applications for Bicester properties. We handle all regulatory approvals.
Steel beam installation, floor strengthening, and staircase construction by qualified Bicester engineers.
Velux roof windows, dormer construction, and window installations to maximize natural light in Bicester homes.
Complete bathroom installations including plumbing, electrical work, and luxury fixtures in your Bicester loft.
Plastering, decorating, flooring, and interior design services to create beautiful Bicester living spaces.
Professional space assessment
Architectural drawings and approvals
Professional loft specialists
Professional loft conversions throughout Bicester city centre, including period properties, modern homes, and conservation areas requiring specialist Bicester planning expertise.
Expert loft conversion services across all Bicester suburban areas. Specializing in semi-detached, detached, and terraced properties throughout Bicester.
Specialist conversions for Bicester's Victorian, Edwardian, and period properties. Sympathetic designs maintaining character while maximizing space.
Expert handling of Bicester conservation area requirements. We navigate planning restrictions and create beautiful conversions that comply with local regulations.
Bicester Loft Conversions Completed
Average Bicester Customer Rating
Years Serving Bicester
Bicester Building Control Approved
With over 15 years of experience in Bicester, we understand local planning requirements, building regulations, and architectural styles. Our Bicester team delivers exceptional loft conversions that enhance your property value.
Hip-to-gable conversion creating master bedroom with ensuite in a Victorian Bicester terrace. Added 30sqm of living space.
Project Value: £48,000
Dormer loft conversion in modern Bicester semi-detached. Created two bedrooms and bathroom for growing family.
Project Value: £42,000
Mansard conversion in Bicester conservation area. Luxury master suite with dressing room and ensuite.
Project Value: £65,000
"My husband is finally out of the living room and into his new man-cave! Thank you Building Group for saving my sanity in Bicester!"
- Sophie Taylor, Bicester
"They managed the party wall agreement with our Bicester neighbors professionally. The whole street was impressed with their cleanliness."
- Olivia White, Bicester
"Professional service from start to finish. Our hip-to-gable conversion has added so much space to our Bicester home. Quality workmanship."
- Sophie Taylor, Bicester
Loft conversion costs in Bicester vary based on type, size, and specifications. Typical Bicester prices: Velux conversions £20,000-£30,000, Dormer conversions £35,000-£45,000, Hip-to-gable £40,000-£55,000, Mansard conversions £45,000-£65,000. All Bicester quotes include structural work, insulation, electrics, plastering, and building control fees. Contact us for a free Bicester survey and detailed quote.
A transparent guide to typical conversion costs in the Bicester area (2025 Estimates)
| Conversion Type | Suitability | Timeframe | Price Range |
|---|---|---|---|
| Velux (Roof Light) | Existing headroom > 2.3m | 4-6 Weeks | £20k - £30k |
| Dormer (Rear) | Semis & Terraces | 6-8 Weeks | £35k - £50k |
| Hip-to-Gable | End-terrace & Semi-detached | 8-10 Weeks | £45k - £60k |
| Mansard | Period Properties / London Styles | 10-12 Weeks | £50k - £75k+ |
*Prices are indicative for Bicester properties and subject to survey.
Senior Structural Specialist
"I oversee all loft conversions in the Bicester area. My job is to ensure your project meets local building regulations while maximizing every inch of space. I'm happy to visit your property for a preliminary structural assessment."
Four recent loft conversions across the UK — from a London mansard within a conservation area to an L-shaped Manchester dormer, a Birmingham hip-to-gable, and a Leeds rear dormer. Tap any project for the full case study.
Loft
Mansard loft conversion on a London Victorian terrace within a conservation area — full mansard build raising the rear roof line, slate-clad cheeks to match the neighbours, two double bedrooms with private en-suites, and a sky-lit landing. Approval secured under full planning, not Permitted Development.
Loft
L-shaped rear dormer loft conversion on a Victorian terrace — turning unused roof space into two double bedrooms and a shared en-suite, with two Velux windows to the front, a glass balustrade to the new staircase, and matching slate-grey finish to blend with the original roof.
Loft
Rear dormer loft conversion turning unused roof space into a master bedroom and en-suite, with two Velux roof windows to the front and a slim glass balustrade to the new staircase.
Loft
Hip-to-gable conversion with rear dormer on a 1930s semi-detached — squaring off the original hipped roofline to gain full standing headroom, creating a master bedroom with built-in wardrobes and a generous en-suite, plus a third Velux to the front for natural light.
Want to see the rest of our portfolio?
View All Case StudiesDon't move, improve! Let our specialists design the perfect loft conversion for your Bicester home.
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