Fully insured and CITB certified. We are the trusted choice for homeowners in Cranbrook looking for high-end, reliable loft conversion services.
Get Your Free Cranbrook QuoteSee what your Cranbrook neighbours say about our loft conversion work.
"My husband is finally out of the living room and into his new man-cave! Thank you Building Group for saving my sanity in Cranbrook!"
"The best decision we made for our Cranbrook house. The extra office space is perfect. Great attention to detail from the whole team."
"Cannot recommend them enough for loft conversions in Cranbrook. They handled all the planning permission and the build was smooth."
"High-end finish on our mansard extension. The carpentry and plastering work in our Cranbrook home is flawless."
"We went from 'cramped' to 'camped out in luxury'. Our new loft bedroom is the best room in our Cranbrook house."
"Building Group transformed our Cranbrook property's unused loft into two beautiful bedrooms. Excellent communication throughout and competitive pricing."
See more genuine Cranbrook customer reviews and loft conversion project galleries.
Read More ReviewsTransform your Cranbrook 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 Cranbrook, we create bespoke solutions tailored to your lifestyle.
Our experienced Cranbrook team handles every aspect of your loft conversion project. From initial design and planning permission through to final decoration, we ensure your Cranbrook conversion maximizes space, natural light, and property value.
Choose the perfect conversion type for your Cranbrook property to maximize space and value
The most cost-effective option for Cranbrook properties using roof windows for natural light. Perfect for Cranbrook homes with adequate headroom.
Add valuable floor space and headroom to your Cranbrook property with single or multiple dormers. Popular choice in Cranbrook for space optimization.
Transform sloping hip roofs into vertical gable walls in your Cranbrook home, significantly increasing usable floor space. Ideal for Cranbrook semi-detached properties.
The premium option for Cranbrook properties creating maximum space with near-vertical walls. Perfect for period properties in Cranbrook.
Your Cranbrook property needs minimum 2.3m headroom at the highest point and sufficient floor area for conversion. Our Cranbrook specialists provide free assessments to determine if your loft is suitable and advise on the best conversion type for your Cranbrook property and budget. Most Cranbrook conversions fall under permitted development rights, but we handle all planning and building regulations applications where required.
Most terraced and semi-detached homes in Cranbrook 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 Cranbrook housing stock.
Living in a terraced or semi-detached house in Cranbrook? We manage the Party Wall Notice process with your neighbors to ensure works can start on time.
Comprehensive evaluation of your Cranbrook loft space, structural assessment, and advice on the best conversion type for your property.
Architectural drawings, 3D visualizations, and planning permission applications for Cranbrook properties. We handle all regulatory approvals.
Steel beam installation, floor strengthening, and staircase construction by qualified Cranbrook engineers.
Velux roof windows, dormer construction, and window installations to maximize natural light in Cranbrook homes.
Complete bathroom installations including plumbing, electrical work, and luxury fixtures in your Cranbrook loft.
Plastering, decorating, flooring, and interior design services to create beautiful Cranbrook living spaces.
Professional space assessment
Architectural drawings and approvals
Professional loft specialists
Professional loft conversions throughout Cranbrook city centre, including period properties, modern homes, and conservation areas requiring specialist Cranbrook planning expertise.
Expert loft conversion services across all Cranbrook suburban areas. Specializing in semi-detached, detached, and terraced properties throughout Cranbrook.
Specialist conversions for Cranbrook's Victorian, Edwardian, and period properties. Sympathetic designs maintaining character while maximizing space.
Expert handling of Cranbrook conservation area requirements. We navigate planning restrictions and create beautiful conversions that comply with local regulations.
Cranbrook Loft Conversions Completed
Average Cranbrook Customer Rating
Years Serving Cranbrook
Cranbrook Building Control Approved
With over 15 years of experience in Cranbrook, we understand local planning requirements, building regulations, and architectural styles. Our Cranbrook team delivers exceptional loft conversions that enhance your property value.
Hip-to-gable conversion creating master bedroom with ensuite in a Victorian Cranbrook terrace. Added 30sqm of living space.
Project Value: £48,000
Dormer loft conversion in modern Cranbrook semi-detached. Created two bedrooms and bathroom for growing family.
Project Value: £42,000
Mansard conversion in Cranbrook conservation area. Luxury master suite with dressing room and ensuite.
Project Value: £65,000
"My husband is finally out of the living room and into his new man-cave! Thank you Building Group for saving my sanity in Cranbrook!"
- Charlotte Robinson, Cranbrook
"The best decision we made for our Cranbrook house. The extra office space is perfect. Great attention to detail from the whole team."
- Charles Scott, Cranbrook
"Cannot recommend them enough for loft conversions in Cranbrook. They handled all the planning permission and the build was smooth."
- Paul Roberts, Cranbrook
Loft conversion costs in Cranbrook vary based on type, size, and specifications. Typical Cranbrook 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 Cranbrook quotes include structural work, insulation, electrics, plastering, and building control fees. Contact us for a free Cranbrook survey and detailed quote.
A transparent guide to typical conversion costs in the Cranbrook 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 Cranbrook properties and subject to survey.
Senior Structural Specialist
"I oversee all loft conversions in the Cranbrook 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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