Why move out when you can move up? Save on stamp duty and moving costs with a premium loft conversion in Winchester by Building Group.
Get Your Free Winchester QuoteSee what your Winchester neighbours say about our loft conversion work.
"The neighbors are jealous, the kids are happy, and the house value went up. The trifecta! Best investment in Winchester."
"They managed the party wall agreement with our Winchester neighbors professionally. The whole street was impressed with their cleanliness."
"Professional service from start to finish. Our hip-to-gable conversion has added so much space to our Winchester home. Quality workmanship."
"I was expecting dust everywhere, but they left my Winchester house cleaner than they found it. Wizards, not builders!"
"We went from 'cramped' to 'camped out in luxury'. Our new loft bedroom is the best room in our Winchester house."
"Fantastic loft conversion in our Winchester home. The team was professional, tidy, and finished on time. Our new master bedroom with ensuite is stunning."
See more genuine Winchester customer reviews and loft conversion project galleries.
Read More ReviewsTransform your Winchester 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 Winchester, we create bespoke solutions tailored to your lifestyle.
Our experienced Winchester team handles every aspect of your loft conversion project. From initial design and planning permission through to final decoration, we ensure your Winchester conversion maximizes space, natural light, and property value.
Choose the perfect conversion type for your Winchester property to maximize space and value
The most cost-effective option for Winchester properties using roof windows for natural light. Perfect for Winchester homes with adequate headroom.
Add valuable floor space and headroom to your Winchester property with single or multiple dormers. Popular choice in Winchester for space optimization.
Transform sloping hip roofs into vertical gable walls in your Winchester home, significantly increasing usable floor space. Ideal for Winchester semi-detached properties.
The premium option for Winchester properties creating maximum space with near-vertical walls. Perfect for period properties in Winchester.
Your Winchester property needs minimum 2.3m headroom at the highest point and sufficient floor area for conversion. Our Winchester specialists provide free assessments to determine if your loft is suitable and advise on the best conversion type for your Winchester property and budget. Most Winchester conversions fall under permitted development rights, but we handle all planning and building regulations applications where required.
Most terraced and semi-detached homes in Winchester 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 Winchester housing stock.
Living in a terraced or semi-detached house in Winchester? We manage the Party Wall Notice process with your neighbors to ensure works can start on time.
Comprehensive evaluation of your Winchester loft space, structural assessment, and advice on the best conversion type for your property.
Architectural drawings, 3D visualizations, and planning permission applications for Winchester properties. We handle all regulatory approvals.
Steel beam installation, floor strengthening, and staircase construction by qualified Winchester engineers.
Velux roof windows, dormer construction, and window installations to maximize natural light in Winchester homes.
Complete bathroom installations including plumbing, electrical work, and luxury fixtures in your Winchester loft.
Plastering, decorating, flooring, and interior design services to create beautiful Winchester living spaces.
Professional space assessment
Architectural drawings and approvals
Professional loft specialists
Professional loft conversions throughout Winchester city centre, including period properties, modern homes, and conservation areas requiring specialist Winchester planning expertise.
Expert loft conversion services across all Winchester suburban areas. Specializing in semi-detached, detached, and terraced properties throughout Winchester.
Specialist conversions for Winchester's Victorian, Edwardian, and period properties. Sympathetic designs maintaining character while maximizing space.
Expert handling of Winchester conservation area requirements. We navigate planning restrictions and create beautiful conversions that comply with local regulations.
Winchester Loft Conversions Completed
Average Winchester Customer Rating
Years Serving Winchester
Winchester Building Control Approved
With over 15 years of experience in Winchester, we understand local planning requirements, building regulations, and architectural styles. Our Winchester team delivers exceptional loft conversions that enhance your property value.
Hip-to-gable conversion creating master bedroom with ensuite in a Victorian Winchester terrace. Added 30sqm of living space.
Project Value: £48,000
Dormer loft conversion in modern Winchester semi-detached. Created two bedrooms and bathroom for growing family.
Project Value: £42,000
Mansard conversion in Winchester conservation area. Luxury master suite with dressing room and ensuite.
Project Value: £65,000
"The neighbors are jealous, the kids are happy, and the house value went up. The trifecta! Best investment in Winchester."
- George Adams, Winchester
"They managed the party wall agreement with our Winchester neighbors professionally. The whole street was impressed with their cleanliness."
- Mark Thompson, Winchester
"Professional service from start to finish. Our hip-to-gable conversion has added so much space to our Winchester home. Quality workmanship."
- Robert Smith, Winchester
Loft conversion costs in Winchester vary based on type, size, and specifications. Typical Winchester 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 Winchester quotes include structural work, insulation, electrics, plastering, and building control fees. Contact us for a free Winchester survey and detailed quote.
A transparent guide to typical conversion costs in the Winchester 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 Winchester properties and subject to survey.
Senior Structural Specialist
"I oversee all loft conversions in the Winchester 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 Winchester loft and restore family peace.
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