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Get Your Free Bangor QuoteSee what your Bangor neighbours say about our loft conversion work.
"They finished ahead of schedule! In the building trade! Unheard of! Best crew in Bangor by a mile."
"Fantastic loft conversion in our Bangor home. The team was professional, tidy, and finished on time. Our new master bedroom with ensuite is stunning."
"High-end finish on our mansard extension. The carpentry and plastering work in our Bangor home is flawless."
"Building Group provided excellent advice on the best layout for our Bangor terrace. The result is better than we imagined."
"Cannot recommend them enough for loft conversions in Bangor. They handled all the planning permission and the build was smooth."
"If you want a loft in Bangor, just book these guys. Seriously. Don't waste time with anyone else. Building Group is the real deal."
See more genuine Bangor customer reviews and loft conversion project galleries.
Read More ReviewsTransform your Bangor 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 Bangor, we create bespoke solutions tailored to your lifestyle.
Our experienced Bangor team handles every aspect of your loft conversion project. From initial design and planning permission through to final decoration, we ensure your Bangor conversion maximizes space, natural light, and property value.
Choose the perfect conversion type for your Bangor property to maximize space and value
The most cost-effective option for Bangor properties using roof windows for natural light. Perfect for Bangor homes with adequate headroom.
Add valuable floor space and headroom to your Bangor property with single or multiple dormers. Popular choice in Bangor for space optimization.
Transform sloping hip roofs into vertical gable walls in your Bangor home, significantly increasing usable floor space. Ideal for Bangor semi-detached properties.
The premium option for Bangor properties creating maximum space with near-vertical walls. Perfect for period properties in Bangor.
Your Bangor property needs minimum 2.3m headroom at the highest point and sufficient floor area for conversion. Our Bangor specialists provide free assessments to determine if your loft is suitable and advise on the best conversion type for your Bangor property and budget. Most Bangor conversions fall under permitted development rights, but we handle all planning and building regulations applications where required.
Most terraced and semi-detached homes in Bangor 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 Bangor housing stock.
Living in a terraced or semi-detached house in Bangor? We manage the Party Wall Notice process with your neighbors to ensure works can start on time.
Comprehensive evaluation of your Bangor loft space, structural assessment, and advice on the best conversion type for your property.
Architectural drawings, 3D visualizations, and planning permission applications for Bangor properties. We handle all regulatory approvals.
Steel beam installation, floor strengthening, and staircase construction by qualified Bangor engineers.
Velux roof windows, dormer construction, and window installations to maximize natural light in Bangor homes.
Complete bathroom installations including plumbing, electrical work, and luxury fixtures in your Bangor loft.
Plastering, decorating, flooring, and interior design services to create beautiful Bangor living spaces.
Professional space assessment
Architectural drawings and approvals
Professional loft specialists
Professional loft conversions throughout Bangor city centre, including period properties, modern homes, and conservation areas requiring specialist Bangor planning expertise.
Expert loft conversion services across all Bangor suburban areas. Specializing in semi-detached, detached, and terraced properties throughout Bangor.
Specialist conversions for Bangor's Victorian, Edwardian, and period properties. Sympathetic designs maintaining character while maximizing space.
Expert handling of Bangor conservation area requirements. We navigate planning restrictions and create beautiful conversions that comply with local regulations.
Bangor Loft Conversions Completed
Average Bangor Customer Rating
Years Serving Bangor
Bangor Building Control Approved
With over 15 years of experience in Bangor, we understand local planning requirements, building regulations, and architectural styles. Our Bangor team delivers exceptional loft conversions that enhance your property value.
Hip-to-gable conversion creating master bedroom with ensuite in a Victorian Bangor terrace. Added 30sqm of living space.
Project Value: £48,000
Dormer loft conversion in modern Bangor semi-detached. Created two bedrooms and bathroom for growing family.
Project Value: £42,000
Mansard conversion in Bangor 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 Bangor by a mile."
- William Turner, Bangor
"Fantastic loft conversion in our Bangor home. The team was professional, tidy, and finished on time. Our new master bedroom with ensuite is stunning."
- Sophie Taylor, Bangor
"High-end finish on our mansard extension. The carpentry and plastering work in our Bangor home is flawless."
- Sophie Taylor, Bangor
Loft conversion costs in Bangor vary based on type, size, and specifications. Typical Bangor 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 Bangor quotes include structural work, insulation, electrics, plastering, and building control fees. Contact us for a free Bangor survey and detailed quote.
A transparent guide to typical conversion costs in the Bangor 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 Bangor properties and subject to survey.
Senior Structural Specialist
"I oversee all loft conversions in the Bangor 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 StudiesReady to add value to your home? Call Building Group now for a complimentary site visit in Bangor.
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