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Get Your Free Marlborough QuoteSee what your Marlborough neighbours say about our loft conversion work.
"The 10-year guarantee gave us peace of mind. A trustworthy company serving the Marlborough area."
"The best decision we made for our Marlborough house. The extra office space is perfect. Great attention to detail from the whole team."
"Fantastic loft conversion in our Marlborough home. The team was professional, tidy, and finished on time. Our new master bedroom with ensuite is stunning."
"They finished ahead of schedule! In the building trade! Unheard of! Best crew in Marlborough by a mile."
"I used to hit my head on the rafters. Now I can do jumping jacks in my new Marlborough bedroom. Incredible transformation."
"Building Group were the only company to spot a potential issue with our chimney in Marlborough and solved it before starting. True experts."
See more genuine Marlborough customer reviews and loft conversion project galleries.
Read More ReviewsTransform your Marlborough 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 Marlborough, we create bespoke solutions tailored to your lifestyle.
Our experienced Marlborough team handles every aspect of your loft conversion project. From initial design and planning permission through to final decoration, we ensure your Marlborough conversion maximizes space, natural light, and property value.
Choose the perfect conversion type for your Marlborough property to maximize space and value
The most cost-effective option for Marlborough properties using roof windows for natural light. Perfect for Marlborough homes with adequate headroom.
Add valuable floor space and headroom to your Marlborough property with single or multiple dormers. Popular choice in Marlborough for space optimization.
Transform sloping hip roofs into vertical gable walls in your Marlborough home, significantly increasing usable floor space. Ideal for Marlborough semi-detached properties.
The premium option for Marlborough properties creating maximum space with near-vertical walls. Perfect for period properties in Marlborough.
Your Marlborough property needs minimum 2.3m headroom at the highest point and sufficient floor area for conversion. Our Marlborough specialists provide free assessments to determine if your loft is suitable and advise on the best conversion type for your Marlborough property and budget. Most Marlborough conversions fall under permitted development rights, but we handle all planning and building regulations applications where required.
Most terraced and semi-detached homes in Marlborough 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 Marlborough housing stock.
Living in a terraced or semi-detached house in Marlborough? We manage the Party Wall Notice process with your neighbors to ensure works can start on time.
Comprehensive evaluation of your Marlborough loft space, structural assessment, and advice on the best conversion type for your property.
Architectural drawings, 3D visualizations, and planning permission applications for Marlborough properties. We handle all regulatory approvals.
Steel beam installation, floor strengthening, and staircase construction by qualified Marlborough engineers.
Velux roof windows, dormer construction, and window installations to maximize natural light in Marlborough homes.
Complete bathroom installations including plumbing, electrical work, and luxury fixtures in your Marlborough loft.
Plastering, decorating, flooring, and interior design services to create beautiful Marlborough living spaces.
Professional space assessment
Architectural drawings and approvals
Professional loft specialists
Professional loft conversions throughout Marlborough city centre, including period properties, modern homes, and conservation areas requiring specialist Marlborough planning expertise.
Expert loft conversion services across all Marlborough suburban areas. Specializing in semi-detached, detached, and terraced properties throughout Marlborough.
Specialist conversions for Marlborough's Victorian, Edwardian, and period properties. Sympathetic designs maintaining character while maximizing space.
Expert handling of Marlborough conservation area requirements. We navigate planning restrictions and create beautiful conversions that comply with local regulations.
Marlborough Loft Conversions Completed
Average Marlborough Customer Rating
Years Serving Marlborough
Marlborough Building Control Approved
With over 15 years of experience in Marlborough, we understand local planning requirements, building regulations, and architectural styles. Our Marlborough team delivers exceptional loft conversions that enhance your property value.
Hip-to-gable conversion creating master bedroom with ensuite in a Victorian Marlborough terrace. Added 30sqm of living space.
Project Value: £48,000
Dormer loft conversion in modern Marlborough semi-detached. Created two bedrooms and bathroom for growing family.
Project Value: £42,000
Mansard conversion in Marlborough conservation area. Luxury master suite with dressing room and ensuite.
Project Value: £65,000
"The 10-year guarantee gave us peace of mind. A trustworthy company serving the Marlborough area."
- Jessica Green, Marlborough
"The best decision we made for our Marlborough house. The extra office space is perfect. Great attention to detail from the whole team."
- Joseph Clark, Marlborough
"Fantastic loft conversion in our Marlborough home. The team was professional, tidy, and finished on time. Our new master bedroom with ensuite is stunning."
- Rebecca Hill, Marlborough
Loft conversion costs in Marlborough vary based on type, size, and specifications. Typical Marlborough 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 Marlborough quotes include structural work, insulation, electrics, plastering, and building control fees. Contact us for a free Marlborough survey and detailed quote.
A transparent guide to typical conversion costs in the Marlborough 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 Marlborough properties and subject to survey.
Senior Structural Specialist
"I oversee all loft conversions in the Marlborough 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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