Add a luxurious master suite or a quiet home office. Our Boston team are experts in maximizing light and space in every loft conversion.
Get Your Free Boston QuoteSee what your Boston neighbours say about our loft conversion work.
"Our hip-to-gable conversion has completely changed our family life. We finally have the space we need in Boston without moving."
"We were worried about the disruption, but the team at Building Group were incredibly considerate of our home in Boston."
"My husband is finally out of the living room and into his new man-cave! Thank you Building Group for saving my sanity in Boston!"
"Finally, a builder who turns up when they say they will! Restored my faith in tradesmen. Top job in Boston."
"They managed the party wall agreement with our Boston neighbors professionally. The whole street was impressed with their cleanliness."
"High-end finish on our mansard extension. The carpentry and plastering work in our Boston home is flawless."
See more genuine Boston customer reviews and loft conversion project galleries.
Read More ReviewsTransform your Boston 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 Boston, we create bespoke solutions tailored to your lifestyle.
Our experienced Boston team handles every aspect of your loft conversion project. From initial design and planning permission through to final decoration, we ensure your Boston conversion maximizes space, natural light, and property value.
Choose the perfect conversion type for your Boston property to maximize space and value
The most cost-effective option for Boston properties using roof windows for natural light. Perfect for Boston homes with adequate headroom.
Add valuable floor space and headroom to your Boston property with single or multiple dormers. Popular choice in Boston for space optimization.
Transform sloping hip roofs into vertical gable walls in your Boston home, significantly increasing usable floor space. Ideal for Boston semi-detached properties.
The premium option for Boston properties creating maximum space with near-vertical walls. Perfect for period properties in Boston.
Your Boston property needs minimum 2.3m headroom at the highest point and sufficient floor area for conversion. Our Boston specialists provide free assessments to determine if your loft is suitable and advise on the best conversion type for your Boston property and budget. Most Boston conversions fall under permitted development rights, but we handle all planning and building regulations applications where required.
Most terraced and semi-detached homes in Boston 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 Boston housing stock.
Living in a terraced or semi-detached house in Boston? We manage the Party Wall Notice process with your neighbors to ensure works can start on time.
Comprehensive evaluation of your Boston loft space, structural assessment, and advice on the best conversion type for your property.
Architectural drawings, 3D visualizations, and planning permission applications for Boston properties. We handle all regulatory approvals.
Steel beam installation, floor strengthening, and staircase construction by qualified Boston engineers.
Velux roof windows, dormer construction, and window installations to maximize natural light in Boston homes.
Complete bathroom installations including plumbing, electrical work, and luxury fixtures in your Boston loft.
Plastering, decorating, flooring, and interior design services to create beautiful Boston living spaces.
Professional space assessment
Architectural drawings and approvals
Professional loft specialists
Professional loft conversions throughout Boston city centre, including period properties, modern homes, and conservation areas requiring specialist Boston planning expertise.
Expert loft conversion services across all Boston suburban areas. Specializing in semi-detached, detached, and terraced properties throughout Boston.
Specialist conversions for Boston's Victorian, Edwardian, and period properties. Sympathetic designs maintaining character while maximizing space.
Expert handling of Boston conservation area requirements. We navigate planning restrictions and create beautiful conversions that comply with local regulations.
Boston Loft Conversions Completed
Average Boston Customer Rating
Years Serving Boston
Boston Building Control Approved
With over 15 years of experience in Boston, we understand local planning requirements, building regulations, and architectural styles. Our Boston team delivers exceptional loft conversions that enhance your property value.
Hip-to-gable conversion creating master bedroom with ensuite in a Victorian Boston terrace. Added 30sqm of living space.
Project Value: £48,000
Dormer loft conversion in modern Boston semi-detached. Created two bedrooms and bathroom for growing family.
Project Value: £42,000
Mansard conversion in Boston conservation area. Luxury master suite with dressing room and ensuite.
Project Value: £65,000
"Our hip-to-gable conversion has completely changed our family life. We finally have the space we need in Boston without moving."
- Emily Lewis, Boston
"We were worried about the disruption, but the team at Building Group were incredibly considerate of our home in Boston."
- Thomas Brown, Boston
"My husband is finally out of the living room and into his new man-cave! Thank you Building Group for saving my sanity in Boston!"
- Lisa Chen, Boston
Loft conversion costs in Boston vary based on type, size, and specifications. Typical Boston 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 Boston quotes include structural work, insulation, electrics, plastering, and building control fees. Contact us for a free Boston survey and detailed quote.
A transparent guide to typical conversion costs in the Boston 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 Boston properties and subject to survey.
Senior Structural Specialist
"I oversee all loft conversions in the Boston 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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