Professional, reliable, and high-quality loft extensions. We manage the entire process for Eastleigh homeowners, from planning permission to the final coat of paint.
Get Your Free Eastleigh QuoteSee what your Eastleigh neighbours say about our loft conversion work.
"The best decision we made for our Eastleigh house. The extra office space is perfect. Great attention to detail from the whole team."
"Building Group provided excellent advice on the best layout for our Eastleigh terrace. The result is better than we imagined."
"Fantastic loft conversion in our Eastleigh home. The team was professional, tidy, and finished on time. Our new master bedroom with ensuite is stunning."
"The 10-year guarantee gave us peace of mind. A trustworthy company serving the Eastleigh area."
"They managed the party wall agreement with our Eastleigh neighbors professionally. The whole street was impressed with their cleanliness."
"Building Group turned my scary spider attic into a 5-star hotel suite. My guests in Eastleigh never want to leave!"
See more genuine Eastleigh customer reviews and loft conversion project galleries.
Read More ReviewsTransform your Eastleigh 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 Eastleigh, we create bespoke solutions tailored to your lifestyle.
Our experienced Eastleigh team handles every aspect of your loft conversion project. From initial design and planning permission through to final decoration, we ensure your Eastleigh conversion maximizes space, natural light, and property value.
Choose the perfect conversion type for your Eastleigh property to maximize space and value
The most cost-effective option for Eastleigh properties using roof windows for natural light. Perfect for Eastleigh homes with adequate headroom.
Add valuable floor space and headroom to your Eastleigh property with single or multiple dormers. Popular choice in Eastleigh for space optimization.
Transform sloping hip roofs into vertical gable walls in your Eastleigh home, significantly increasing usable floor space. Ideal for Eastleigh semi-detached properties.
The premium option for Eastleigh properties creating maximum space with near-vertical walls. Perfect for period properties in Eastleigh.
Your Eastleigh property needs minimum 2.3m headroom at the highest point and sufficient floor area for conversion. Our Eastleigh specialists provide free assessments to determine if your loft is suitable and advise on the best conversion type for your Eastleigh property and budget. Most Eastleigh conversions fall under permitted development rights, but we handle all planning and building regulations applications where required.
Most terraced and semi-detached homes in Eastleigh 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 Eastleigh housing stock.
Living in a terraced or semi-detached house in Eastleigh? We manage the Party Wall Notice process with your neighbors to ensure works can start on time.
Comprehensive evaluation of your Eastleigh loft space, structural assessment, and advice on the best conversion type for your property.
Architectural drawings, 3D visualizations, and planning permission applications for Eastleigh properties. We handle all regulatory approvals.
Steel beam installation, floor strengthening, and staircase construction by qualified Eastleigh engineers.
Velux roof windows, dormer construction, and window installations to maximize natural light in Eastleigh homes.
Complete bathroom installations including plumbing, electrical work, and luxury fixtures in your Eastleigh loft.
Plastering, decorating, flooring, and interior design services to create beautiful Eastleigh living spaces.
Professional space assessment
Architectural drawings and approvals
Professional loft specialists
Professional loft conversions throughout Eastleigh city centre, including period properties, modern homes, and conservation areas requiring specialist Eastleigh planning expertise.
Expert loft conversion services across all Eastleigh suburban areas. Specializing in semi-detached, detached, and terraced properties throughout Eastleigh.
Specialist conversions for Eastleigh's Victorian, Edwardian, and period properties. Sympathetic designs maintaining character while maximizing space.
Expert handling of Eastleigh conservation area requirements. We navigate planning restrictions and create beautiful conversions that comply with local regulations.
Eastleigh Loft Conversions Completed
Average Eastleigh Customer Rating
Years Serving Eastleigh
Eastleigh Building Control Approved
With over 15 years of experience in Eastleigh, we understand local planning requirements, building regulations, and architectural styles. Our Eastleigh team delivers exceptional loft conversions that enhance your property value.
Hip-to-gable conversion creating master bedroom with ensuite in a Victorian Eastleigh terrace. Added 30sqm of living space.
Project Value: £48,000
Dormer loft conversion in modern Eastleigh semi-detached. Created two bedrooms and bathroom for growing family.
Project Value: £42,000
Mansard conversion in Eastleigh conservation area. Luxury master suite with dressing room and ensuite.
Project Value: £65,000
"The best decision we made for our Eastleigh house. The extra office space is perfect. Great attention to detail from the whole team."
- Jessica Green, Eastleigh
"Building Group provided excellent advice on the best layout for our Eastleigh terrace. The result is better than we imagined."
- Paul Roberts, Eastleigh
"Fantastic loft conversion in our Eastleigh home. The team was professional, tidy, and finished on time. Our new master bedroom with ensuite is stunning."
- Helen Baker, Eastleigh
Loft conversion costs in Eastleigh vary based on type, size, and specifications. Typical Eastleigh 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 Eastleigh quotes include structural work, insulation, electrics, plastering, and building control fees. Contact us for a free Eastleigh survey and detailed quote.
A transparent guide to typical conversion costs in the Eastleigh 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 Eastleigh properties and subject to survey.
Senior Structural Specialist
"I oversee all loft conversions in the Eastleigh 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 StudiesFrom planning permission to the final coat of paint, we handle it all. Start your Eastleigh project now.
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