Your Crowthorne attic is capable of so much more than just storing old suitcases. Let us turn that dead space into your favorite room!
Get Your Free Crowthorne QuoteSee what your Crowthorne 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 Crowthorne bedroom. Incredible transformation."
"Cannot recommend them enough for loft conversions in Crowthorne. They handled all the planning permission and the build was smooth."
"Building Group turned my scary spider attic into a 5-star hotel suite. My guests in Crowthorne never want to leave!"
"We hired them for a shell conversion in Crowthorne and were so impressed we asked them to complete the fit-out too. Five stars."
"We went from 'cramped' to 'camped out in luxury'. Our new loft bedroom is the best room in our Crowthorne house."
"Exceptional value for money. We got quotes from three Crowthorne firms and Building Group offered the best spec for the price."
See more genuine Crowthorne customer reviews and loft conversion project galleries.
Read More ReviewsTransform your Crowthorne 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 Crowthorne, we create bespoke solutions tailored to your lifestyle.
Our experienced Crowthorne team handles every aspect of your loft conversion project. From initial design and planning permission through to final decoration, we ensure your Crowthorne conversion maximizes space, natural light, and property value.
Choose the perfect conversion type for your Crowthorne property to maximize space and value
The most cost-effective option for Crowthorne properties using roof windows for natural light. Perfect for Crowthorne homes with adequate headroom.
Add valuable floor space and headroom to your Crowthorne property with single or multiple dormers. Popular choice in Crowthorne for space optimization.
Transform sloping hip roofs into vertical gable walls in your Crowthorne home, significantly increasing usable floor space. Ideal for Crowthorne semi-detached properties.
The premium option for Crowthorne properties creating maximum space with near-vertical walls. Perfect for period properties in Crowthorne.
Your Crowthorne property needs minimum 2.3m headroom at the highest point and sufficient floor area for conversion. Our Crowthorne specialists provide free assessments to determine if your loft is suitable and advise on the best conversion type for your Crowthorne property and budget. Most Crowthorne conversions fall under permitted development rights, but we handle all planning and building regulations applications where required.
Most terraced and semi-detached homes in Crowthorne 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 Crowthorne housing stock.
Living in a terraced or semi-detached house in Crowthorne? We manage the Party Wall Notice process with your neighbors to ensure works can start on time.
Comprehensive evaluation of your Crowthorne loft space, structural assessment, and advice on the best conversion type for your property.
Architectural drawings, 3D visualizations, and planning permission applications for Crowthorne properties. We handle all regulatory approvals.
Steel beam installation, floor strengthening, and staircase construction by qualified Crowthorne engineers.
Velux roof windows, dormer construction, and window installations to maximize natural light in Crowthorne homes.
Complete bathroom installations including plumbing, electrical work, and luxury fixtures in your Crowthorne loft.
Plastering, decorating, flooring, and interior design services to create beautiful Crowthorne living spaces.
Professional space assessment
Architectural drawings and approvals
Professional loft specialists
Professional loft conversions throughout Crowthorne city centre, including period properties, modern homes, and conservation areas requiring specialist Crowthorne planning expertise.
Expert loft conversion services across all Crowthorne suburban areas. Specializing in semi-detached, detached, and terraced properties throughout Crowthorne.
Specialist conversions for Crowthorne's Victorian, Edwardian, and period properties. Sympathetic designs maintaining character while maximizing space.
Expert handling of Crowthorne conservation area requirements. We navigate planning restrictions and create beautiful conversions that comply with local regulations.
Crowthorne Loft Conversions Completed
Average Crowthorne Customer Rating
Years Serving Crowthorne
Crowthorne Building Control Approved
With over 15 years of experience in Crowthorne, we understand local planning requirements, building regulations, and architectural styles. Our Crowthorne team delivers exceptional loft conversions that enhance your property value.
Hip-to-gable conversion creating master bedroom with ensuite in a Victorian Crowthorne terrace. Added 30sqm of living space.
Project Value: £48,000
Dormer loft conversion in modern Crowthorne semi-detached. Created two bedrooms and bathroom for growing family.
Project Value: £42,000
Mansard conversion in Crowthorne 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 Crowthorne bedroom. Incredible transformation."
- David Wilson, Crowthorne
"Cannot recommend them enough for loft conversions in Crowthorne. They handled all the planning permission and the build was smooth."
- Sophie Taylor, Crowthorne
"Building Group turned my scary spider attic into a 5-star hotel suite. My guests in Crowthorne never want to leave!"
- Daniel Evans, Crowthorne
Loft conversion costs in Crowthorne vary based on type, size, and specifications. Typical Crowthorne 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 Crowthorne quotes include structural work, insulation, electrics, plastering, and building control fees. Contact us for a free Crowthorne survey and detailed quote.
A transparent guide to typical conversion costs in the Crowthorne 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 Crowthorne properties and subject to survey.
Senior Structural Specialist
"I oversee all loft conversions in the Crowthorne 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.
Want to see the rest of our portfolio?
View All Case StudiesTake the first step towards a bigger, better home. Contact our Crowthorne team for friendly advice.
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