From initial design to building control sign-off, we handle everything. Trust Building Group for stress-free loft conversions in Crowborough.
Get Your Free Crowborough QuoteSee what your Crowborough neighbours say about our loft conversion work.
"The best decision we made for our Crowborough house. The extra office space is perfect. Great attention to detail from the whole team."
"They managed the party wall agreement with our Crowborough neighbors professionally. The whole street was impressed with their cleanliness."
"We hired them for a shell conversion in Crowborough and were so impressed we asked them to complete the fit-out too. Five stars."
"Professional service from start to finish. Our hip-to-gable conversion has added so much space to our Crowborough home. Quality workmanship."
"Fantastic loft conversion in our Crowborough home. The team was professional, tidy, and finished on time. Our new master bedroom with ensuite is stunning."
"I actually miss having the builders around! Friendly, funny, and polite team. They became part of the family during our Crowborough project."
See more genuine Crowborough customer reviews and loft conversion project galleries.
Read More ReviewsTransform your Crowborough 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 Crowborough, we create bespoke solutions tailored to your lifestyle.
Our experienced Crowborough team handles every aspect of your loft conversion project. From initial design and planning permission through to final decoration, we ensure your Crowborough conversion maximizes space, natural light, and property value.
Choose the perfect conversion type for your Crowborough property to maximize space and value
The most cost-effective option for Crowborough properties using roof windows for natural light. Perfect for Crowborough homes with adequate headroom.
Add valuable floor space and headroom to your Crowborough property with single or multiple dormers. Popular choice in Crowborough for space optimization.
Transform sloping hip roofs into vertical gable walls in your Crowborough home, significantly increasing usable floor space. Ideal for Crowborough semi-detached properties.
The premium option for Crowborough properties creating maximum space with near-vertical walls. Perfect for period properties in Crowborough.
Your Crowborough property needs minimum 2.3m headroom at the highest point and sufficient floor area for conversion. Our Crowborough specialists provide free assessments to determine if your loft is suitable and advise on the best conversion type for your Crowborough property and budget. Most Crowborough conversions fall under permitted development rights, but we handle all planning and building regulations applications where required.
Most terraced and semi-detached homes in Crowborough 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 Crowborough housing stock.
Living in a terraced or semi-detached house in Crowborough? We manage the Party Wall Notice process with your neighbors to ensure works can start on time.
Comprehensive evaluation of your Crowborough loft space, structural assessment, and advice on the best conversion type for your property.
Architectural drawings, 3D visualizations, and planning permission applications for Crowborough properties. We handle all regulatory approvals.
Steel beam installation, floor strengthening, and staircase construction by qualified Crowborough engineers.
Velux roof windows, dormer construction, and window installations to maximize natural light in Crowborough homes.
Complete bathroom installations including plumbing, electrical work, and luxury fixtures in your Crowborough loft.
Plastering, decorating, flooring, and interior design services to create beautiful Crowborough living spaces.
Professional space assessment
Architectural drawings and approvals
Professional loft specialists
Professional loft conversions throughout Crowborough city centre, including period properties, modern homes, and conservation areas requiring specialist Crowborough planning expertise.
Expert loft conversion services across all Crowborough suburban areas. Specializing in semi-detached, detached, and terraced properties throughout Crowborough.
Specialist conversions for Crowborough's Victorian, Edwardian, and period properties. Sympathetic designs maintaining character while maximizing space.
Expert handling of Crowborough conservation area requirements. We navigate planning restrictions and create beautiful conversions that comply with local regulations.
Crowborough Loft Conversions Completed
Average Crowborough Customer Rating
Years Serving Crowborough
Crowborough Building Control Approved
With over 15 years of experience in Crowborough, we understand local planning requirements, building regulations, and architectural styles. Our Crowborough team delivers exceptional loft conversions that enhance your property value.
Hip-to-gable conversion creating master bedroom with ensuite in a Victorian Crowborough terrace. Added 30sqm of living space.
Project Value: £48,000
Dormer loft conversion in modern Crowborough semi-detached. Created two bedrooms and bathroom for growing family.
Project Value: £42,000
Mansard conversion in Crowborough conservation area. Luxury master suite with dressing room and ensuite.
Project Value: £65,000
"The best decision we made for our Crowborough house. The extra office space is perfect. Great attention to detail from the whole team."
- George Adams, Crowborough
"They managed the party wall agreement with our Crowborough neighbors professionally. The whole street was impressed with their cleanliness."
- Helen Baker, Crowborough
"We hired them for a shell conversion in Crowborough and were so impressed we asked them to complete the fit-out too. Five stars."
- Lisa Chen, Crowborough
Loft conversion costs in Crowborough vary based on type, size, and specifications. Typical Crowborough 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 Crowborough quotes include structural work, insulation, electrics, plastering, and building control fees. Contact us for a free Crowborough survey and detailed quote.
A transparent guide to typical conversion costs in the Crowborough 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 Crowborough properties and subject to survey.
Senior Structural Specialist
"I oversee all loft conversions in the Crowborough 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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View All Case StudiesQuality craftsmanship, guaranteed. Book your free structural survey in Crowborough with Building Group.
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