Building Group is Petersfield's premier loft conversion company. We combine architectural expertise with master craftsmanship to deliver superior results.
Get Your Free Petersfield QuoteSee what your Petersfield neighbours say about our loft conversion work.
"We are delighted with our Velux conversion in Petersfield. The builders were respectful and the finish is high quality. Highly recommended."
"The 10-year guarantee gave us peace of mind. A trustworthy company serving the Petersfield area."
"Top quality dormer conversion. Added significant value to our Petersfield property. Friendly team and very clean working environment."
"They finished ahead of schedule! In the building trade! Unheard of! Best crew in Petersfield by a mile."
"Exceptional value for money. We got quotes from three Petersfield firms and Building Group offered the best spec for the price."
"Great experience from the quote to the final sign-off. The project manager kept us updated every week on our Petersfield build."
See more genuine Petersfield customer reviews and loft conversion project galleries.
Read More ReviewsTransform your Petersfield 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 Petersfield, we create bespoke solutions tailored to your lifestyle.
Our experienced Petersfield team handles every aspect of your loft conversion project. From initial design and planning permission through to final decoration, we ensure your Petersfield conversion maximizes space, natural light, and property value.
Choose the perfect conversion type for your Petersfield property to maximize space and value
The most cost-effective option for Petersfield properties using roof windows for natural light. Perfect for Petersfield homes with adequate headroom.
Add valuable floor space and headroom to your Petersfield property with single or multiple dormers. Popular choice in Petersfield for space optimization.
Transform sloping hip roofs into vertical gable walls in your Petersfield home, significantly increasing usable floor space. Ideal for Petersfield semi-detached properties.
The premium option for Petersfield properties creating maximum space with near-vertical walls. Perfect for period properties in Petersfield.
Your Petersfield property needs minimum 2.3m headroom at the highest point and sufficient floor area for conversion. Our Petersfield specialists provide free assessments to determine if your loft is suitable and advise on the best conversion type for your Petersfield property and budget. Most Petersfield conversions fall under permitted development rights, but we handle all planning and building regulations applications where required.
Most terraced and semi-detached homes in Petersfield 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 Petersfield housing stock.
Living in a terraced or semi-detached house in Petersfield? We manage the Party Wall Notice process with your neighbors to ensure works can start on time.
Comprehensive evaluation of your Petersfield loft space, structural assessment, and advice on the best conversion type for your property.
Architectural drawings, 3D visualizations, and planning permission applications for Petersfield properties. We handle all regulatory approvals.
Steel beam installation, floor strengthening, and staircase construction by qualified Petersfield engineers.
Velux roof windows, dormer construction, and window installations to maximize natural light in Petersfield homes.
Complete bathroom installations including plumbing, electrical work, and luxury fixtures in your Petersfield loft.
Plastering, decorating, flooring, and interior design services to create beautiful Petersfield living spaces.
Professional space assessment
Architectural drawings and approvals
Professional loft specialists
Professional loft conversions throughout Petersfield city centre, including period properties, modern homes, and conservation areas requiring specialist Petersfield planning expertise.
Expert loft conversion services across all Petersfield suburban areas. Specializing in semi-detached, detached, and terraced properties throughout Petersfield.
Specialist conversions for Petersfield's Victorian, Edwardian, and period properties. Sympathetic designs maintaining character while maximizing space.
Expert handling of Petersfield conservation area requirements. We navigate planning restrictions and create beautiful conversions that comply with local regulations.
Petersfield Loft Conversions Completed
Average Petersfield Customer Rating
Years Serving Petersfield
Petersfield Building Control Approved
With over 15 years of experience in Petersfield, we understand local planning requirements, building regulations, and architectural styles. Our Petersfield team delivers exceptional loft conversions that enhance your property value.
Hip-to-gable conversion creating master bedroom with ensuite in a Victorian Petersfield terrace. Added 30sqm of living space.
Project Value: £48,000
Dormer loft conversion in modern Petersfield semi-detached. Created two bedrooms and bathroom for growing family.
Project Value: £42,000
Mansard conversion in Petersfield conservation area. Luxury master suite with dressing room and ensuite.
Project Value: £65,000
"We are delighted with our Velux conversion in Petersfield. The builders were respectful and the finish is high quality. Highly recommended."
- Daniel Evans, Petersfield
"The 10-year guarantee gave us peace of mind. A trustworthy company serving the Petersfield area."
- Jessica Green, Petersfield
"Top quality dormer conversion. Added significant value to our Petersfield property. Friendly team and very clean working environment."
- Daniel Evans, Petersfield
Loft conversion costs in Petersfield vary based on type, size, and specifications. Typical Petersfield 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 Petersfield quotes include structural work, insulation, electrics, plastering, and building control fees. Contact us for a free Petersfield survey and detailed quote.
A transparent guide to typical conversion costs in the Petersfield 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 Petersfield properties and subject to survey.
Senior Structural Specialist
"I oversee all loft conversions in the Petersfield 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 StudiesFind out exactly how much your Petersfield loft conversion will cost with our transparent, detailed pricing.
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