Fully insured and CITB certified. We are the trusted choice for homeowners in Daventry looking for high-end, reliable loft conversion services.
Get Your Free Daventry QuoteSee what your Daventry neighbours say about our loft conversion work.
"I was expecting dust everywhere, but they left my Daventry house cleaner than they found it. Wizards, not builders!"
"The 10-year guarantee gave us peace of mind. A trustworthy company serving the Daventry area."
"Building Group turned my scary spider attic into a 5-star hotel suite. My guests in Daventry never want to leave!"
"Professional service from start to finish. Our hip-to-gable conversion has added so much space to our Daventry home. Quality workmanship."
"Building Group provided excellent advice on the best layout for our Daventry terrace. The result is better than we imagined."
"Building Group were the only company to spot a potential issue with our chimney in Daventry and solved it before starting. True experts."
See more genuine Daventry customer reviews and loft conversion project galleries.
Read More ReviewsTransform your Daventry 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 Daventry, we create bespoke solutions tailored to your lifestyle.
Our experienced Daventry team handles every aspect of your loft conversion project. From initial design and planning permission through to final decoration, we ensure your Daventry conversion maximizes space, natural light, and property value.
Choose the perfect conversion type for your Daventry property to maximize space and value
The most cost-effective option for Daventry properties using roof windows for natural light. Perfect for Daventry homes with adequate headroom.
Add valuable floor space and headroom to your Daventry property with single or multiple dormers. Popular choice in Daventry for space optimization.
Transform sloping hip roofs into vertical gable walls in your Daventry home, significantly increasing usable floor space. Ideal for Daventry semi-detached properties.
The premium option for Daventry properties creating maximum space with near-vertical walls. Perfect for period properties in Daventry.
Your Daventry property needs minimum 2.3m headroom at the highest point and sufficient floor area for conversion. Our Daventry specialists provide free assessments to determine if your loft is suitable and advise on the best conversion type for your Daventry property and budget. Most Daventry conversions fall under permitted development rights, but we handle all planning and building regulations applications where required.
Most terraced and semi-detached homes in Daventry 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 Daventry housing stock.
Living in a terraced or semi-detached house in Daventry? We manage the Party Wall Notice process with your neighbors to ensure works can start on time.
Comprehensive evaluation of your Daventry loft space, structural assessment, and advice on the best conversion type for your property.
Architectural drawings, 3D visualizations, and planning permission applications for Daventry properties. We handle all regulatory approvals.
Steel beam installation, floor strengthening, and staircase construction by qualified Daventry engineers.
Velux roof windows, dormer construction, and window installations to maximize natural light in Daventry homes.
Complete bathroom installations including plumbing, electrical work, and luxury fixtures in your Daventry loft.
Plastering, decorating, flooring, and interior design services to create beautiful Daventry living spaces.
Professional space assessment
Architectural drawings and approvals
Professional loft specialists
Professional loft conversions throughout Daventry city centre, including period properties, modern homes, and conservation areas requiring specialist Daventry planning expertise.
Expert loft conversion services across all Daventry suburban areas. Specializing in semi-detached, detached, and terraced properties throughout Daventry.
Specialist conversions for Daventry's Victorian, Edwardian, and period properties. Sympathetic designs maintaining character while maximizing space.
Expert handling of Daventry conservation area requirements. We navigate planning restrictions and create beautiful conversions that comply with local regulations.
Daventry Loft Conversions Completed
Average Daventry Customer Rating
Years Serving Daventry
Daventry Building Control Approved
With over 15 years of experience in Daventry, we understand local planning requirements, building regulations, and architectural styles. Our Daventry team delivers exceptional loft conversions that enhance your property value.
Hip-to-gable conversion creating master bedroom with ensuite in a Victorian Daventry terrace. Added 30sqm of living space.
Project Value: £48,000
Dormer loft conversion in modern Daventry semi-detached. Created two bedrooms and bathroom for growing family.
Project Value: £42,000
Mansard conversion in Daventry conservation area. Luxury master suite with dressing room and ensuite.
Project Value: £65,000
"I was expecting dust everywhere, but they left my Daventry house cleaner than they found it. Wizards, not builders!"
- Joseph Clark, Daventry
"The 10-year guarantee gave us peace of mind. A trustworthy company serving the Daventry area."
- Karen Clarke, Daventry
"Building Group turned my scary spider attic into a 5-star hotel suite. My guests in Daventry never want to leave!"
- Victoria King, Daventry
Loft conversion costs in Daventry vary based on type, size, and specifications. Typical Daventry 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 Daventry quotes include structural work, insulation, electrics, plastering, and building control fees. Contact us for a free Daventry survey and detailed quote.
A transparent guide to typical conversion costs in the Daventry 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 Daventry properties and subject to survey.
Senior Structural Specialist
"I oversee all loft conversions in the Daventry 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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