Expert loft conversions in Stevenage. From dormer and hip-to-gable to mansard conversions, our specialists create stunning living spaces tailored to your needs.
Get Your Free Stevenage QuoteSee what your Stevenage neighbours say about our loft conversion work.
"I actually miss having the builders around! Friendly, funny, and polite team. They became part of the family during our Stevenage project."
"They finished ahead of schedule! In the building trade! Unheard of! Best crew in Stevenage by a mile."
"The structural work was done quickly and safely. As a Stevenage local, I appreciated their knowledge of local planning rules."
"High-end finish on our mansard extension. The carpentry and plastering work in our Stevenage home is flawless."
"They managed the party wall agreement with our Stevenage neighbors professionally. The whole street was impressed with their cleanliness."
"Fast, efficient, and friendly. Turned our dark Stevenage attic into a bright, airy yoga studio. Thank you Building Group!"
See more genuine Stevenage customer reviews and loft conversion project galleries.
Read More ReviewsTransform your Stevenage 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 Stevenage, we create bespoke solutions tailored to your lifestyle.
Our experienced Stevenage team handles every aspect of your loft conversion project. From initial design and planning permission through to final decoration, we ensure your Stevenage conversion maximizes space, natural light, and property value.
Choose the perfect conversion type for your Stevenage property to maximize space and value
The most cost-effective option for Stevenage properties using roof windows for natural light. Perfect for Stevenage homes with adequate headroom.
Add valuable floor space and headroom to your Stevenage property with single or multiple dormers. Popular choice in Stevenage for space optimization.
Transform sloping hip roofs into vertical gable walls in your Stevenage home, significantly increasing usable floor space. Ideal for Stevenage semi-detached properties.
The premium option for Stevenage properties creating maximum space with near-vertical walls. Perfect for period properties in Stevenage.
Your Stevenage property needs minimum 2.3m headroom at the highest point and sufficient floor area for conversion. Our Stevenage specialists provide free assessments to determine if your loft is suitable and advise on the best conversion type for your Stevenage property and budget. Most Stevenage conversions fall under permitted development rights, but we handle all planning and building regulations applications where required.
Most terraced and semi-detached homes in Stevenage 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 Stevenage housing stock.
Living in a terraced or semi-detached house in Stevenage? We manage the Party Wall Notice process with your neighbors to ensure works can start on time.
Comprehensive evaluation of your Stevenage loft space, structural assessment, and advice on the best conversion type for your property.
Architectural drawings, 3D visualizations, and planning permission applications for Stevenage properties. We handle all regulatory approvals.
Steel beam installation, floor strengthening, and staircase construction by qualified Stevenage engineers.
Velux roof windows, dormer construction, and window installations to maximize natural light in Stevenage homes.
Complete bathroom installations including plumbing, electrical work, and luxury fixtures in your Stevenage loft.
Plastering, decorating, flooring, and interior design services to create beautiful Stevenage living spaces.
Professional space assessment
Architectural drawings and approvals
Professional loft specialists
Professional loft conversions throughout Stevenage city centre, including period properties, modern homes, and conservation areas requiring specialist Stevenage planning expertise.
Expert loft conversion services across all Stevenage suburban areas. Specializing in semi-detached, detached, and terraced properties throughout Stevenage.
Specialist conversions for Stevenage's Victorian, Edwardian, and period properties. Sympathetic designs maintaining character while maximizing space.
Expert handling of Stevenage conservation area requirements. We navigate planning restrictions and create beautiful conversions that comply with local regulations.
Stevenage Loft Conversions Completed
Average Stevenage Customer Rating
Years Serving Stevenage
Stevenage Building Control Approved
With over 15 years of experience in Stevenage, we understand local planning requirements, building regulations, and architectural styles. Our Stevenage team delivers exceptional loft conversions that enhance your property value.
Hip-to-gable conversion creating master bedroom with ensuite in a Victorian Stevenage terrace. Added 30sqm of living space.
Project Value: £48,000
Dormer loft conversion in modern Stevenage semi-detached. Created two bedrooms and bathroom for growing family.
Project Value: £42,000
Mansard conversion in Stevenage conservation area. Luxury master suite with dressing room and ensuite.
Project Value: £65,000
"I actually miss having the builders around! Friendly, funny, and polite team. They became part of the family during our Stevenage project."
- Richard Harris, Stevenage
"They finished ahead of schedule! In the building trade! Unheard of! Best crew in Stevenage by a mile."
- Emma Johnson, Stevenage
"The structural work was done quickly and safely. As a Stevenage local, I appreciated their knowledge of local planning rules."
- Richard Harris, Stevenage
Loft conversion costs in Stevenage vary based on type, size, and specifications. Typical Stevenage 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 Stevenage quotes include structural work, insulation, electrics, plastering, and building control fees. Contact us for a free Stevenage survey and detailed quote.
A transparent guide to typical conversion costs in the Stevenage 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 Stevenage properties and subject to survey.
Senior Structural Specialist
"I oversee all loft conversions in the Stevenage 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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View All Case StudiesStop fighting over the bathroom! Add an ensuite to your Stevenage loft and restore family peace.
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