Maximize your property value and living space without moving. Our Crawley team delivers bespoke loft solutions with a 10-year structural guarantee.
Get Your Free Crawley QuoteSee what your Crawley neighbours say about our loft conversion work.
"They finished ahead of schedule! In the building trade! Unheard of! Best crew in Crawley by a mile."
"Building Group turned my scary spider attic into a 5-star hotel suite. My guests in Crawley never want to leave!"
"Building Group provided excellent advice on the best layout for our Crawley terrace. The result is better than we imagined."
"Building Group transformed our Crawley property's unused loft into two beautiful bedrooms. Excellent communication throughout and competitive pricing."
"Our hip-to-gable conversion has completely changed our family life. We finally have the space we need in Crawley without moving."
"If you want a loft in Crawley, just book these guys. Seriously. Don't waste time with anyone else. Building Group is the real deal."
See more genuine Crawley customer reviews and loft conversion project galleries.
Read More ReviewsTransform your Crawley 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 Crawley, we create bespoke solutions tailored to your lifestyle.
Our experienced Crawley team handles every aspect of your loft conversion project. From initial design and planning permission through to final decoration, we ensure your Crawley conversion maximizes space, natural light, and property value.
Choose the perfect conversion type for your Crawley property to maximize space and value
The most cost-effective option for Crawley properties using roof windows for natural light. Perfect for Crawley homes with adequate headroom.
Add valuable floor space and headroom to your Crawley property with single or multiple dormers. Popular choice in Crawley for space optimization.
Transform sloping hip roofs into vertical gable walls in your Crawley home, significantly increasing usable floor space. Ideal for Crawley semi-detached properties.
The premium option for Crawley properties creating maximum space with near-vertical walls. Perfect for period properties in Crawley.
Your Crawley property needs minimum 2.3m headroom at the highest point and sufficient floor area for conversion. Our Crawley specialists provide free assessments to determine if your loft is suitable and advise on the best conversion type for your Crawley property and budget. Most Crawley conversions fall under permitted development rights, but we handle all planning and building regulations applications where required.
Most terraced and semi-detached homes in Crawley 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 Crawley housing stock.
Living in a terraced or semi-detached house in Crawley? We manage the Party Wall Notice process with your neighbors to ensure works can start on time.
Comprehensive evaluation of your Crawley loft space, structural assessment, and advice on the best conversion type for your property.
Architectural drawings, 3D visualizations, and planning permission applications for Crawley properties. We handle all regulatory approvals.
Steel beam installation, floor strengthening, and staircase construction by qualified Crawley engineers.
Velux roof windows, dormer construction, and window installations to maximize natural light in Crawley homes.
Complete bathroom installations including plumbing, electrical work, and luxury fixtures in your Crawley loft.
Plastering, decorating, flooring, and interior design services to create beautiful Crawley living spaces.
Professional space assessment
Architectural drawings and approvals
Professional loft specialists
Professional loft conversions throughout Crawley city centre, including period properties, modern homes, and conservation areas requiring specialist Crawley planning expertise.
Expert loft conversion services across all Crawley suburban areas. Specializing in semi-detached, detached, and terraced properties throughout Crawley.
Specialist conversions for Crawley's Victorian, Edwardian, and period properties. Sympathetic designs maintaining character while maximizing space.
Expert handling of Crawley conservation area requirements. We navigate planning restrictions and create beautiful conversions that comply with local regulations.
Crawley Loft Conversions Completed
Average Crawley Customer Rating
Years Serving Crawley
Crawley Building Control Approved
With over 15 years of experience in Crawley, we understand local planning requirements, building regulations, and architectural styles. Our Crawley team delivers exceptional loft conversions that enhance your property value.
Hip-to-gable conversion creating master bedroom with ensuite in a Victorian Crawley terrace. Added 30sqm of living space.
Project Value: £48,000
Dormer loft conversion in modern Crawley semi-detached. Created two bedrooms and bathroom for growing family.
Project Value: £42,000
Mansard conversion in Crawley conservation area. Luxury master suite with dressing room and ensuite.
Project Value: £65,000
"They finished ahead of schedule! In the building trade! Unheard of! Best crew in Crawley by a mile."
- Andrew Martin, Crawley
"Building Group turned my scary spider attic into a 5-star hotel suite. My guests in Crawley never want to leave!"
- Mark Thompson, Crawley
"Building Group provided excellent advice on the best layout for our Crawley terrace. The result is better than we imagined."
- Michael Hughes, Crawley
Loft conversion costs in Crawley vary based on type, size, and specifications. Typical Crawley 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 Crawley quotes include structural work, insulation, electrics, plastering, and building control fees. Contact us for a free Crawley survey and detailed quote.
A transparent guide to typical conversion costs in the Crawley 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 Crawley properties and subject to survey.
Senior Structural Specialist
"I oversee all loft conversions in the Crawley 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 StudiesStop fighting over the bathroom! Add an ensuite to your Crawley loft and restore family peace.
Book Free Crawley Loft Survey