Loft Conversion Richmond: Dormer, Hip-to-Gable and Mansard Lofts for Period Homes
A loft conversion in Richmond, designed, approved and built by one in-house team. We produce the drawings, handle the planning application and build the loft with our own builders, carpenters, Gas Safe plumbers and NICEIC electricians, so you get one project manager and one fixed price from start to finish.
Drawings and planning included · No subcontractors · Fixed price · Free site visit
A Hill Street Loft: Two Quotes, Two Wrong Answers
A homeowner on Hill Street wanted a master bedroom and en suite in the loft of her Victorian terrace. The first company quoted £64,000 but left out the planning application, sending her to an architect who charged a further £4,500 for drawings, plus the council’s planning fee. The second company told her the dormer would be refused because of the Richmond Hill view.
At our site visit, we confirmed the house was in a conservation area, so the dormer needed full planning permission, but that it was well outside the protected view. We designed the dormer to sit below the ridge, in natural slate, with conservation rooflights to the front. The application went in four weeks after our first visit and was approved ten weeks later. The build took fourteen weeks.
The fixed price, including drawings and the planning application, was £67,500. The final invoice was £67,500.
Planning a Loft Conversion in Richmond's Conservation Areas
Much of Richmond lies in conservation areas, and that shapes what you can build in the roof. It doesn’t mean a dormer will be refused. It means the design has to suit the street.
What conservation officers look for
Richmond’s planning officers approve well-designed rear dormers regularly. The details that matter are natural slate to match the existing roof, conservation rooflights that sit flush with the slope, and a dormer that sits below the ridge and in from the eaves, so it doesn’t dominate the back of the house. Front dormers are rarely approved on period streets, so most Richmond lofts extend to the rear.
Permitted development outside conservation areas
If your home is not in a conservation area, isn’t listed and isn’t a flat, a rear dormer or hip-to-gable conversion can often be built without planning permission, within set size limits. We apply for a Lawful Development Certificate so you have written confirmation from the council, which you’ll need when you sell.
The Richmond Hill view
The view from Richmond Hill is protected, so the council looks at whether roof changes would be visible in it. Most rear dormers on Richmond terraces sit well outside it, but we check your property’s position before any design work starts.
Listed homes and Kew Gardens
Listed buildings need Listed Building Consent for almost any roof change. Homes near Kew Gardens, a UNESCO World Heritage Site, may need a heritage impact assessment with the planning application. We prepare both within the fixed price where they apply.
Is Your Loft Suitable for Conversion?
Most Richmond lofts can be converted, but three things decide what’s possible and what it costs.
Head Height
You need roughly 2.2 metres from the top of the ceiling joists to the underside of the ridge for a comfortable room. If your loft is lower, a dormer or mansard can create the height, or in some cases the ceiling below can be lowered.
Roof Structure
Victorian and Edwardian roofs are usually cut on site from timber rafters and purlins, which are straightforward to adapt. Newer roofs with trussed rafters need more structural work, as the trusses have to be replaced with steel beams.
Room for a staircase
The new stairs normally continue above the existing ones. We plan the staircase at the site visit because its position determines the layout of both the loft and the landing below.
Prices include architectural drawings, the planning application, structural calculations, building control, the staircase, insulation, plastering and electrics. All prices exclude VAT.
Loft type | Best for | From | Time on site
Rooflight (Velux) | Lofts with enough height already; no change to the roof shape | £45,000 | 8–12 weeks
Rear dormer | Victorian terraces; one large bedroom with en suite | £58,000 | 12–16 weeks
Hip-to-gable + dormer | Edwardian and 1930s semis with hipped roofs | £68,000 | 14–18 weeks
L-shaped dormer | Terraces with a rear addition; two bedrooms possible | £72,000 | 14–18 weeks
Mansard | Maximum space; often for townhouses | £85,000 | 16–20 weeks
En suite (add-on) | Shower room in any loft conversion | +£11,000 | Within build
Where planning permission is needed, allow 10–14 weeks for the application before work starts.
Which Loft Conversion Suits Your Richmond Home?
Victorian Terraces
The most common Richmond loft. A rear dormer creates one large bedroom with an en suite, while an L-shaped dormer over the rear addition can fit two bedrooms.
Edwardian and 1930s semis in East Sheen, Kew and Mortlake
Hipped roofs leave little space inside. A hip-to-gable conversion straightens the side of the roof, and adding a rear dormer creates a full-height room.
Victorian Villas
Larger roofs offer generous space with a rear or L-shaped dormer. Near Richmond Hill, the materials and design need particular care.
Georgian Townhouses
Lofts are often on the third or fourth floor, and many townhouses are listed. A mansard is sometimes the right answer, subject to Listed Building Consent.
Flats and Modern Homes
Flats have no permitted development rights, and many purpose-built blocks can’t take a loft conversion. We confirm whether it’s possible at the site visit.
Building Regulations and Fire Safety
Every loft conversion must meet Building Regulations, whether or not it needs planning permission. The main requirements are a protected escape route from the loft, usually fire doors to the habitable rooms and mains-wired smoke alarms on each floor; floors strong enough for a bedroom; insulation to current standards; and safe headroom over the stairs. In terraced and semi-detached houses, the new steel beams usually rest on the party wall, so party wall notices are needed too. We arrange the building control inspections and serve the notices as part of the job, and you receive the completion certificate at the end.
How Your Loft Conversion Works
1. Free Site Visit
We aim to visit within 48 hours to measure the loft, check the roof structure and head height, and confirm whether planning permission is needed.
2. Design and Fixed-Price Quote
Within five working days, you will receive a fixed-price quote covering drawings, planning, structural calculations and the full build.
3. Planning and Approvals
We submit the planning application or Lawful Development Certificate, serve party wall notices and book building control.
4. Building The Loft
Most of the work happens from scaffolding outside, so you can usually stay at home. The opening to the new stairs is made near the end, which keeps dust in the rest of the house to a minimum.
5. Sign-off and Certificates
You receive building control sign-off, your electrical installation certificate, a Gas Safe certificate where gas work is involved and a 12-month workmanship guarantee.
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Book Now → Loft Conversion Richmond
Tell us about your kitchen, and we’ll visit within 48 hours, confirm any planning needs and send a fixed-price quote within five working days.
– Gas Safe plumbers and NICEIC electricians, directly employed
– Planning applications and party wall notices handled for you
– Fixed price: the price we quote is the price you pay
– 12-month workmanship guarantee
25+ Years Central London Experience
We’ve completed home renovations in Central London since 2000. Over 150 projects across Chelsea, Belgravia, Kensington, Knightsbridge, Marylebone, Bloomsbury, Fitzrovia, and Westminster.
Fully Insured & Guaranteed
£10M public liability insurance, £10M employers' liability insurance, and professional indemnity coverage. All work is fully guaranteed. Building control certificates provided. Electrical and Gas Safe certificates where applicable. Written guarantees on all home renovation services Central London. Insurance certificates available on request.
Quality Materials & Expert Craftsmanship
We specify and source high-quality materials from established manufacturers ensuring reliability and longevity.
Conservation Area Specialists
95% planning approval rate in Central London conservation areas. We've successfully renovated listed buildings and strict conservation properties across Westminster and Kensington & Chelsea. We know what conservation officers want to see before we submit applications.
200+ Satisfied Customers
Proven track record across Central London with hundreds of completed renovations. Our reputation built on exceptional project management, quality workmanship, transparent pricing, and beautiful results that exceed expectations.
Meet Our Trusted Team
John Michaels
Renovation Consultant
Dan Wright
Plumbing and Heating Engineer
Glenn Knowles
CEO
Harry Collins
Repair Technician
Ready to transform your Central London property? Get your fast quote today. Contact Chelsea Property Renovation & Maintenance Ltd
How much does a loft conversion cost in Richmond?
A loft conversion in Richmond starts from £45,000 for a rooflight conversion, £58,000 for a rear dormer, £68,000 for a hip-to-gable, £72,000 for an L-shaped dormer and £85,000 for a mansard. Adding an en suite starts from £11,000. Prices include architectural drawings, the planning application, structural calculations, building control and all construction. Every project gets a free site visit and a fixed-price quote, and the price we quote is the price you pay. All prices exclude VAT.
Do I need planning permission for a loft conversion in Richmond?
It depends on the type of loft and where you live. In a conservation area, dormers, hip-to-gable and mansard conversions need full planning permission, while rooflights usually don’t. Outside conservation areas, many rear dormers and hip-to-gable conversions can be built under permitted development, and we apply for a Lawful Development Certificate to confirm it. Flats and listed buildings always need consent. We confirm the position at the free site visit.
Does the Richmond Hill view affect my loft conversion?
Usually not. The view from Richmond Hill is protected, so the council considers whether roof changes would be visible in it, but most rear dormers on Richmond terraces sit well outside it. We check your property’s position at the site visit, before any design work starts.
How long does a loft conversion take?
A rooflight conversion takes 8–12 weeks on site, a rear dormer 12–16 weeks, an L-shaped dormer or hip-to-gable 14–18 weeks and a mansard 16–20 weeks. Where planning permission is needed, allow 10–14 weeks for the application before work starts.
What's included in a fixed-price loft conversion quote?
Your quote covers architectural drawings, the planning application and fee, structural calculations, party wall notices, the roof structure, dormer, staircase, insulation, fire safety work, plastering and electrics. If you add an en suite, it also covers the plumbing, soil stack, waterproofing and tiling. You receive building control sign-off, an electrical installation certificate and a 12-month workmanship guarantee.
Do you use subcontractors?
No. Our builders, carpenters, Gas Safe plumbers, NICEIC electricians and plasterers are all directly employed. You deal with one project manager and one fixed price from the first drawing to the final coat of paint.
Which areas around Richmond do you cover?
We build loft conversions across Richmond and Kew (TW9), Ham and Petersham (TW10), Barnes (SW13), East Sheen and Mortlake (SW14), Putney (SW15) and Wimbledon (SW19). We aim to visit within 48 hours and send a fixed-price quote within five working days. To book your free site visit, call 020 7129 7418.
Central London
Your local team for fast, reliable electrical service throughout Central London.
Address:
289 Brompton Road, Knightsbridge, London, SW3 2DY
Email:
info@chelseapropertyrenovation.co.uk
Phone number:
020 7129 7418
Office Hours:
Monday-Friday 8:30 am-6 pm
Saturday -Sunday - Emergency only
Areas We Serve:
- Belgravia
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All our tradesmen, plumbers, heating engineers, electricians, and builders are fully accredited by leading industry bodies, ensuring the highest standards of quality and professionalism on every job.
