We specialize in Victorian, Edwardian, and modern property conversions across Lewes. Let us help you realize your home's full potential.
Get Your Free Lewes QuoteSee what your Lewes neighbours say about our loft conversion work.
"I used to hit my head on the rafters. Now I can do jumping jacks in my new Lewes bedroom. Incredible transformation."
"The neighbors are jealous, the kids are happy, and the house value went up. The trifecta! Best investment in Lewes."
"Fast, efficient, and friendly. Turned our dark Lewes attic into a bright, airy yoga studio. Thank you Building Group!"
"Great experience from the quote to the final sign-off. The project manager kept us updated every week on our Lewes build."
"We are delighted with our Velux conversion in Lewes. The builders were respectful and the finish is high quality. Highly recommended."
"Building Group transformed our Lewes property's unused loft into two beautiful bedrooms. Excellent communication throughout and competitive pricing."
See more genuine Lewes customer reviews and loft conversion project galleries.
Read More ReviewsTransform your Lewes 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 Lewes, we create bespoke solutions tailored to your lifestyle.
Our experienced Lewes team handles every aspect of your loft conversion project. From initial design and planning permission through to final decoration, we ensure your Lewes conversion maximizes space, natural light, and property value.
Choose the perfect conversion type for your Lewes property to maximize space and value
The most cost-effective option for Lewes properties using roof windows for natural light. Perfect for Lewes homes with adequate headroom.
Add valuable floor space and headroom to your Lewes property with single or multiple dormers. Popular choice in Lewes for space optimization.
Transform sloping hip roofs into vertical gable walls in your Lewes home, significantly increasing usable floor space. Ideal for Lewes semi-detached properties.
The premium option for Lewes properties creating maximum space with near-vertical walls. Perfect for period properties in Lewes.
Your Lewes property needs minimum 2.3m headroom at the highest point and sufficient floor area for conversion. Our Lewes specialists provide free assessments to determine if your loft is suitable and advise on the best conversion type for your Lewes property and budget. Most Lewes conversions fall under permitted development rights, but we handle all planning and building regulations applications where required.
Most terraced and semi-detached homes in Lewes 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 Lewes housing stock.
Living in a terraced or semi-detached house in Lewes? We manage the Party Wall Notice process with your neighbors to ensure works can start on time.
Comprehensive evaluation of your Lewes loft space, structural assessment, and advice on the best conversion type for your property.
Architectural drawings, 3D visualizations, and planning permission applications for Lewes properties. We handle all regulatory approvals.
Steel beam installation, floor strengthening, and staircase construction by qualified Lewes engineers.
Velux roof windows, dormer construction, and window installations to maximize natural light in Lewes homes.
Complete bathroom installations including plumbing, electrical work, and luxury fixtures in your Lewes loft.
Plastering, decorating, flooring, and interior design services to create beautiful Lewes living spaces.
Professional space assessment
Architectural drawings and approvals
Professional loft specialists
Professional loft conversions throughout Lewes city centre, including period properties, modern homes, and conservation areas requiring specialist Lewes planning expertise.
Expert loft conversion services across all Lewes suburban areas. Specializing in semi-detached, detached, and terraced properties throughout Lewes.
Specialist conversions for Lewes's Victorian, Edwardian, and period properties. Sympathetic designs maintaining character while maximizing space.
Expert handling of Lewes conservation area requirements. We navigate planning restrictions and create beautiful conversions that comply with local regulations.
Lewes Loft Conversions Completed
Average Lewes Customer Rating
Years Serving Lewes
Lewes Building Control Approved
With over 15 years of experience in Lewes, we understand local planning requirements, building regulations, and architectural styles. Our Lewes team delivers exceptional loft conversions that enhance your property value.
Hip-to-gable conversion creating master bedroom with ensuite in a Victorian Lewes terrace. Added 30sqm of living space.
Project Value: £48,000
Dormer loft conversion in modern Lewes semi-detached. Created two bedrooms and bathroom for growing family.
Project Value: £42,000
Mansard conversion in Lewes conservation area. Luxury master suite with dressing room and ensuite.
Project Value: £65,000
"I used to hit my head on the rafters. Now I can do jumping jacks in my new Lewes bedroom. Incredible transformation."
- Jessica Green, Lewes
"The neighbors are jealous, the kids are happy, and the house value went up. The trifecta! Best investment in Lewes."
- Karen Clarke, Lewes
"Fast, efficient, and friendly. Turned our dark Lewes attic into a bright, airy yoga studio. Thank you Building Group!"
- Thomas Brown, Lewes
Loft conversion costs in Lewes vary based on type, size, and specifications. Typical Lewes 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 Lewes quotes include structural work, insulation, electrics, plastering, and building control fees. Contact us for a free Lewes survey and detailed quote.
A transparent guide to typical conversion costs in the Lewes 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 Lewes properties and subject to survey.
Senior Structural Specialist
"I oversee all loft conversions in the Lewes 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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