Fully insured and CITB certified. We are the trusted choice for homeowners in Thame looking for high-end, reliable loft conversion services.
Get Your Free Thame QuoteSee what your Thame neighbours say about our loft conversion work.
"We were worried about the disruption, but the team at Building Group were incredibly considerate of our home in Thame."
"Honest, reliable and skilled. Our mansard loft in Thame looks incredible. They finished exactly on budget."
"Our hip-to-gable conversion has completely changed our family life. We finally have the space we need in Thame without moving."
"Fast, efficient, and friendly. Turned our dark Thame attic into a bright, airy yoga studio. Thank you Building Group!"
"We went from 'cramped' to 'camped out in luxury'. Our new loft bedroom is the best room in our Thame house."
"The 10-year guarantee gave us peace of mind. A trustworthy company serving the Thame area."
See more genuine Thame customer reviews and loft conversion project galleries.
Read More ReviewsTransform your Thame 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 Thame, we create bespoke solutions tailored to your lifestyle.
Our experienced Thame team handles every aspect of your loft conversion project. From initial design and planning permission through to final decoration, we ensure your Thame conversion maximizes space, natural light, and property value.
Choose the perfect conversion type for your Thame property to maximize space and value
The most cost-effective option for Thame properties using roof windows for natural light. Perfect for Thame homes with adequate headroom.
Add valuable floor space and headroom to your Thame property with single or multiple dormers. Popular choice in Thame for space optimization.
Transform sloping hip roofs into vertical gable walls in your Thame home, significantly increasing usable floor space. Ideal for Thame semi-detached properties.
The premium option for Thame properties creating maximum space with near-vertical walls. Perfect for period properties in Thame.
Your Thame property needs minimum 2.3m headroom at the highest point and sufficient floor area for conversion. Our Thame specialists provide free assessments to determine if your loft is suitable and advise on the best conversion type for your Thame property and budget. Most Thame conversions fall under permitted development rights, but we handle all planning and building regulations applications where required.
Most terraced and semi-detached homes in Thame 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 Thame housing stock.
Living in a terraced or semi-detached house in Thame? We manage the Party Wall Notice process with your neighbors to ensure works can start on time.
Comprehensive evaluation of your Thame loft space, structural assessment, and advice on the best conversion type for your property.
Architectural drawings, 3D visualizations, and planning permission applications for Thame properties. We handle all regulatory approvals.
Steel beam installation, floor strengthening, and staircase construction by qualified Thame engineers.
Velux roof windows, dormer construction, and window installations to maximize natural light in Thame homes.
Complete bathroom installations including plumbing, electrical work, and luxury fixtures in your Thame loft.
Plastering, decorating, flooring, and interior design services to create beautiful Thame living spaces.
Professional space assessment
Architectural drawings and approvals
Professional loft specialists
Professional loft conversions throughout Thame city centre, including period properties, modern homes, and conservation areas requiring specialist Thame planning expertise.
Expert loft conversion services across all Thame suburban areas. Specializing in semi-detached, detached, and terraced properties throughout Thame.
Specialist conversions for Thame's Victorian, Edwardian, and period properties. Sympathetic designs maintaining character while maximizing space.
Expert handling of Thame conservation area requirements. We navigate planning restrictions and create beautiful conversions that comply with local regulations.
Thame Loft Conversions Completed
Average Thame Customer Rating
Years Serving Thame
Thame Building Control Approved
With over 15 years of experience in Thame, we understand local planning requirements, building regulations, and architectural styles. Our Thame team delivers exceptional loft conversions that enhance your property value.
Hip-to-gable conversion creating master bedroom with ensuite in a Victorian Thame terrace. Added 30sqm of living space.
Project Value: £48,000
Dormer loft conversion in modern Thame semi-detached. Created two bedrooms and bathroom for growing family.
Project Value: £42,000
Mansard conversion in Thame conservation area. Luxury master suite with dressing room and ensuite.
Project Value: £65,000
"We were worried about the disruption, but the team at Building Group were incredibly considerate of our home in Thame."
- Rebecca Hill, Thame
"Honest, reliable and skilled. Our mansard loft in Thame looks incredible. They finished exactly on budget."
- Sarah Jenkins, Thame
"Our hip-to-gable conversion has completely changed our family life. We finally have the space we need in Thame without moving."
- Richard Harris, Thame
Loft conversion costs in Thame vary based on type, size, and specifications. Typical Thame 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 Thame quotes include structural work, insulation, electrics, plastering, and building control fees. Contact us for a free Thame survey and detailed quote.
A transparent guide to typical conversion costs in the Thame 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 Thame properties and subject to survey.
Senior Structural Specialist
"I oversee all loft conversions in the Thame 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.
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