Professional, reliable, and high-quality loft extensions. We manage the entire process for Basingstoke homeowners, from planning permission to the final coat of paint.
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"We hired them for a shell conversion in Basingstoke and were so impressed we asked them to complete the fit-out too. Five stars."
"Building Group turned my scary spider attic into a 5-star hotel suite. My guests in Basingstoke never want to leave!"
"Exceptional value for money. We got quotes from three Basingstoke firms and Building Group offered the best spec for the price."
"Building Group were the only company to spot a potential issue with our chimney in Basingstoke and solved it before starting. True experts."
"If you want a loft in Basingstoke, just book these guys. Seriously. Don't waste time with anyone else. Building Group is the real deal."
"Great experience from the quote to the final sign-off. The project manager kept us updated every week on our Basingstoke build."
See more genuine Basingstoke customer reviews and loft conversion project galleries.
Read More ReviewsTransform your Basingstoke 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 Basingstoke, we create bespoke solutions tailored to your lifestyle.
Our experienced Basingstoke team handles every aspect of your loft conversion project. From initial design and planning permission through to final decoration, we ensure your Basingstoke conversion maximizes space, natural light, and property value.
Choose the perfect conversion type for your Basingstoke property to maximize space and value
The most cost-effective option for Basingstoke properties using roof windows for natural light. Perfect for Basingstoke homes with adequate headroom.
Add valuable floor space and headroom to your Basingstoke property with single or multiple dormers. Popular choice in Basingstoke for space optimization.
Transform sloping hip roofs into vertical gable walls in your Basingstoke home, significantly increasing usable floor space. Ideal for Basingstoke semi-detached properties.
The premium option for Basingstoke properties creating maximum space with near-vertical walls. Perfect for period properties in Basingstoke.
Your Basingstoke property needs minimum 2.3m headroom at the highest point and sufficient floor area for conversion. Our Basingstoke specialists provide free assessments to determine if your loft is suitable and advise on the best conversion type for your Basingstoke property and budget. Most Basingstoke conversions fall under permitted development rights, but we handle all planning and building regulations applications where required.
Most terraced and semi-detached homes in Basingstoke 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 Basingstoke housing stock.
Living in a terraced or semi-detached house in Basingstoke? We manage the Party Wall Notice process with your neighbors to ensure works can start on time.
Comprehensive evaluation of your Basingstoke loft space, structural assessment, and advice on the best conversion type for your property.
Architectural drawings, 3D visualizations, and planning permission applications for Basingstoke properties. We handle all regulatory approvals.
Steel beam installation, floor strengthening, and staircase construction by qualified Basingstoke engineers.
Velux roof windows, dormer construction, and window installations to maximize natural light in Basingstoke homes.
Complete bathroom installations including plumbing, electrical work, and luxury fixtures in your Basingstoke loft.
Plastering, decorating, flooring, and interior design services to create beautiful Basingstoke living spaces.
Professional space assessment
Architectural drawings and approvals
Professional loft specialists
Professional loft conversions throughout Basingstoke city centre, including period properties, modern homes, and conservation areas requiring specialist Basingstoke planning expertise.
Expert loft conversion services across all Basingstoke suburban areas. Specializing in semi-detached, detached, and terraced properties throughout Basingstoke.
Specialist conversions for Basingstoke's Victorian, Edwardian, and period properties. Sympathetic designs maintaining character while maximizing space.
Expert handling of Basingstoke conservation area requirements. We navigate planning restrictions and create beautiful conversions that comply with local regulations.
Basingstoke Loft Conversions Completed
Average Basingstoke Customer Rating
Years Serving Basingstoke
Basingstoke Building Control Approved
With over 15 years of experience in Basingstoke, we understand local planning requirements, building regulations, and architectural styles. Our Basingstoke team delivers exceptional loft conversions that enhance your property value.
Hip-to-gable conversion creating master bedroom with ensuite in a Victorian Basingstoke terrace. Added 30sqm of living space.
Project Value: £48,000
Dormer loft conversion in modern Basingstoke semi-detached. Created two bedrooms and bathroom for growing family.
Project Value: £42,000
Mansard conversion in Basingstoke conservation area. Luxury master suite with dressing room and ensuite.
Project Value: £65,000
"We hired them for a shell conversion in Basingstoke and were so impressed we asked them to complete the fit-out too. Five stars."
- Charlotte Robinson, Basingstoke
"Building Group turned my scary spider attic into a 5-star hotel suite. My guests in Basingstoke never want to leave!"
- Charles Scott, Basingstoke
"Exceptional value for money. We got quotes from three Basingstoke firms and Building Group offered the best spec for the price."
- Rebecca Hill, Basingstoke
Loft conversion costs in Basingstoke vary based on type, size, and specifications. Typical Basingstoke 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 Basingstoke quotes include structural work, insulation, electrics, plastering, and building control fees. Contact us for a free Basingstoke survey and detailed quote.
A transparent guide to typical conversion costs in the Basingstoke 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 Basingstoke properties and subject to survey.
Senior Structural Specialist
"I oversee all loft conversions in the Basingstoke 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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