Builders Central London - All Trades In-House | Gas Safe & NICEIC | Fixed Price | Free Site Visit
✓ Extensions | ✓ Loft Conversions | ✓ Structural Work | ✓ Gas Safe | ✓ NICEIC | ✓ All Trades In House | ✓ Fixed Price | ✓ Established 2000
Builders Central London: Expert Building Services
Builders Central London: the deposit was £85,000. The builder disappeared.
A Kensington couple called us last Thursday at 2:15 pm. Their Victorian terrace rear extension had stalled. The previous builder had taken £85,000, demolished the rear wall, exposed the property to the weather, and disappeared. No building control notification. No structural calculations. Walls open to the elements. Winter approaching.
We arrived at 3:47 pm, 92 minutes from the call.
Property weatherproof by Saturday morning. Structural engineer engaged Monday. Retrospective building control submitted Tuesday. Proper construction started Thursday.
Ten weeks later, a 25m² kitchen extension. Building Regulations approved. Structural warranty provided. Completed under the original budget despite the rescue.
That is what builders in Central London should deliver. Not a deposit collected and a site abandoned. A fixed price, a programme, and a team that stays until handover.
Builders Central London Gas Safe registered, NICEIC approved, all trades directly employed. No subcontractors. Established 2000. Fixed price. Free site visit. Call 020 7129 7418.
Benefits:
- Builders Central London Victorian and Edwardian period property specialists established 2000
- All trades directly employed: Gas Safe, NICEIC, structural, joiners, decorators
- No subcontractors: one team, one project manager, one fixed price
- Extensions rear, side return, wraparound, kitchen extensions
- Loft conversions: Velux, dormer, hip-to-gable, mansard
- Basement conversions structural engineering, waterproofing, building control
- Structural alterations: load-bearing wall removal, RSJ beams, building control
- Complete house refurbishment all trades, all certifications, fixed price
- Emergency building services 24/7 92 minutes or less across Central London
- Planning permission managed: 400+ permissions, 95% RBKC and Westminster approval rate
- Listed building and conservation area specialists
- Fixed price: the price on the quotation is the price on the invoice
- Free site visit: complications identified before the quote, not during the work
What do builders Central London charge for extensions and loft conversions?
Builders Central London confirmed prices for extensions from £2,500 per square metre, loft conversions from £45,000, basement conversions from £3,000 per square metre, complete house refurbishment from £100,000. All fixed prices. All prices exclude VAT.
Rear extensions: £2,500-£3,500 per m². Planning 8-12 weeks, construction 8-16 weeks. Most common extension across Chelsea and Kensington. Open-plan kitchen-dining to the garden. Conservation area planning managed; Article 4 directions apply across much of SW3 and SW1X.
Side return extensions: £2,800-£3,800 per m². Planning 8-12 weeks, construction 10-18 weeks. Infills the side passage in Victorian and Georgian terraces. Creates significantly larger kitchens. Particularly effective in Chelsea and Kensington terraces where the side return is typically 1.8-2.2 metres wide.
Kitchen extensions: £40,000-£120,000+ complete structural work, Gas Safe connections, NICEIC kitchen circuits, and kitchen installation all in-house. 12-20 weeks total. The Chelsea couple’s three failed planning applications were rescued, redesigned, and approved eight weeks after our submission; £87,000 added £145,000 value.
Wraparound extensions: £80,000-£200,000+. Rear and side combined for maximum space gain. 10-14 weeks planning, 16-24 weeks construction. Conservation area planning managed throughout.
Loft conversions: Velux £45,000-£60,000, 4-6 weeks. Dormer £50,000-£70,000, 6-10 weeks. Hip-to-gable £55,000-£75,000, 8-12 weeks. Mansard £65,000-£95,000+, 10-16 weeks.
Basement conversions: £3,000-£5,000 per m². Structural engineering, planning, party wall agreements, excavation and underpinning, waterproofing, building control, complete finishing. 12-16 weeks planning, 20-30 weeks construction.
Structural alterations: Single load-bearing wall removal £2,500-£5,000 including structural engineer, RSJ beam, and building control. Multiple walls £5,000-£12,000+.
Complete house refurbishment: £100,000-£300,000+ depending on size and specification. All trades in house. Gas Safe and NICEIC certifications at handover. The Kensington 1890s four-bedroom Victorian terrace rear extension, loft conversion, full rewire, new heating, two bathrooms, kitchen, decoration £185,000, 18 weeks.
All prices exclude VAT. Free site visit. Call 020 7129 7418.
Why do all trades in-house matter for Central London building projects?
Builders Central London fail at the coordination point between trades, and the client pays for every gap.
The structural contractor finishes first-fix, and the electrical contractor is two weeks behind. The plasterer cannot start until both are complete. The kitchen fitter waits for the plasterer. In a Central London property where the homeowner is paying £3,000-£6,000 per month in alternative accommodation, every additional week costs money that no programme overrun can recover.
All trades directly employed eliminates every gap. Gas Safe engineers, NICEIC electricians, structural team, plasterers, joiners, and decorators are the same team, sequenced by one project manager, with no gaps between stages. The Kensington rescue property weatherproof by Saturday, structural engineer Monday, building control Tuesday, construction Thursday, was possible because one team was coordinated by one project manager making one set of decisions.
The Cabul Road Victorian terrace tadelakt bathroom, deVOL kitchen, full rewire, new heating, lime plaster repair throughout delivered in sixteen weeks. Four companies had told the homeowner it required four separate specialists and a main contractor. It required one team.
We present the accommodation cost of the programme alongside the renovation cost on every quotation. A sixteen-week programme versus a twenty-two-week programme at Central London rental rates is typically a £15,000-£35,000 difference, a number most builders Central London never put on their quotation. We put it on ours.
Fixed price. One team. One programme. Call 020 7129 7418.
Do builders Central London need to understand period property construction?
Yes. Builders Central London period property expertise is not optional; it is the difference between a correct renovation and an expensive mistake.
Victorian solid wall construction has no cavity. Moisture management depends entirely on breathable materials throughout. A builder who uses modern cement in lime mortar joints destroys original brickwork from within; the moisture cannot escape, and the frost cycle breaks the face of the brick. Hydraulic lime mortar the only correct material that allows the wall to breathe.
Westminster example: an 1840s terraced house kitchen extension. Previous builders quoted standard foundations. We identified London Clay on site, a substrate that requires piled foundations, not standard strip foundations. Our structural engineer confirmed the standard approach would have caused over £80,000 in settlement damage within five years. The correct foundation specification cost £12,000 more and prevented disaster. Period property knowledge is not a premium service. It is the price of getting it right.
Original floor joist assessment, strengthening decisions versus replacement decisions matter because replacing original joists in a listed building requires Listed Building Consent. The building regulations route and the heritage route are not the same.
Sash windows: the correct approach is repair and draught-proofing. Not replacement. In a Chelsea or Knightsbridge conservation area, replacing a sash window without consent is a planning enforcement risk that no builder should expose a client to.
Lime plaster cable chasing in lime plaster requires an oscillating tool. An angle grinder destroys the surrounding plaster beyond the chase. Repairs are made in hydraulic lime, not gypsum. These are not preferences. They are the methods that preserve the fabric of a £2,000,000 Chelsea period property.
All prices exclude VAT. Call 020 7129 7418.
Do builders Central London need planning permission for extensions?
Builders Central London planning most loft conversions and some extensions proceed under permitted development. Most extensions in Chelsea, Knightsbridge, and Belgravia conservation areas require planning permission due to Article 4 directions removing permitted development rights.
The planning position confirmed at every free site visit:
Rear extensions conservation area planning typically required across SW3, SW1X, and SW1. Design must respond to Victorian or Georgian terrace proportions, use appropriate materials, and demonstrate understanding of the conservation area’s special character. The three reasons RBKC refuses rear extension applications most consistently: wrong proportions, wrong materials, no heritage statement.
Side return extensions planning required in conservation areas. Side return infills in Chelsea are assessed against the surviving rhythm of the terrace width relative to the original rear elevation is the critical design parameter.
Loft conversions rear dormers in conservation areas are typically approved. Front dormers typically refused. Mansard conversions require planning. Velux loft conversions are usually permitted development confirmed at site visit.
Listed buildings: any external alteration, any structural change, any intervention into original historic fabric requires Listed Building Consent before work begins. Criminal offence to proceed without it. The Lowndes Square Grade II listed Victorian townhouse took eight months of Listed Building Consent management; the conservation officer praised the work at final inspection.
What emergency building services do builders Central London provide?
Builders Central London emergency structural concerns, weather damage, and exposed properties require immediate response. We respond 24/7 across Central London.
The Kensington rescue: £85,000 deposit taken, rear wall demolished, builder disappeared. Called Thursday 2:15 pm. Arrived 3:47 pm. Property weatherproof by Saturday morning. Construction started the following Thursday. Ten weeks to handover.
The Belgravia scaffolding collapsed Saturday 6:23 am. Scaffolding partially collapsed overnight, blocking pavement, danger to the public. Arrived 7:01 am, 38 minutes. Scaffolding secured, made safe, emergency replacement arranged. Pavement clear by 10:30 am.
Emergency response times confirmed:
Area | Typical Response |
Chelsea SW3, Belgravia SW1, Knightsbridge SW1X | 15-30 minutes |
South Kensington SW7, Kensington W8 | 30-45 minutes |
Westminster SW1, Pimlico SW1V | 45-60 minutes |
Marylebone W1, Mayfair W1 | 60-90 minutes |
Emergency services structural damage assessment, emergency roof repairs, wall damage, emergency boarding and weatherproofing, scaffolding for safety, making properties safe and secure.
Real person answers immediately. No call centre. Gas Safe and NICEIC qualified engineers respond, not general labourers. 020 7129 7418.
What structural work do builders Central London carry out?
Builders Central London structural work: load-bearing wall removal, RSJ beam installation, foundation work, roof structure modifications, floor reinforcement, wall stabilisation. All engineered. All building control approved.
Load-bearing wall removal: Single wall £2,500-£5,000 structural engineer calculation, RSJ beam supplied and installed, building control inspection and certification. Party wall notices served before any structural work begins on a terraced property.
Multiple walls £5,000-£12,000+ full structural engineering package, multiple beams, building control managed throughout.
The most common structural work in a Chelsea kitchen renovation is the wall between kitchen and dining room in a Victorian terrace, which is almost always load-bearing. The RSJ beam specification, the beam installation, and the building control certification are included in every Chelsea PR&M kitchen renovation fixed price.
Foundation work: London Clay assessment; piled foundations where required. The Westminster 1840s terrace London Clay identified on site, piled foundations specified, £80,000+ in settlement damage prevented.
Roof structure modifications: For loft conversions, steel frames, ridge beams, structural changes to accommodate dormer construction. Structural engineer engaged before planning application is submitted.
Party wall: Every structural alteration in a terraced Central London property triggers the Party Wall etc. Act 1996. Party wall notices served on both neighbours before any structural work begins. Party wall process managed within the fixed price.
All prices exclude VAT. Call 020 7129 7418.
Builders Central London - Areas we cover
Builders Chelsea SW3 Builders Chelsea SW3 – extensions, loft conversions, structural alterations, complete refurbishment across Draycott Avenue, Paultons Square, Flood Street, Cheyne Walk, Sloane Avenue, King’s Road. Victorian terrace and mansion block specialists. Conservation area planning managed. All trades in-house. Fixed price. Call 020 7129 7418.
Builders Knightsbridge SW1X Builders Knightsbridge SW1X – heritage and listed building specialists across Pont Street, Cadogan Square, Lennox Gardens, Lowndes Square. Grade II listed renovation of the Lowndes Square standard confirmed by the conservation officer. All trades in-house. Fixed price. Call 020 7129 7418.
Builders Kensington W8 Builders Kensington W8 – Victorian villa and Georgian townhouse specialists across Phillimore Estate, Campden Hill, Edwardes Square, Victoria Road. The Kensington rescue: £85,000 deposit abandoned, property rescued, ten weeks to handover. All trades in-house. Fixed price. Call 020 7129 7418.
Builders Belgravia SW1 Builders Belgravia SW1 – Grade I, Grade II*, and Grade II listed building experience across Eaton Square, Chester Square, Belgrave Square, Elizabeth Street. Listed Building Consent managed. Conservation officer liaison. All trades in-house. Fixed price. Call 020 7129 7418.
Builders Westminster SW1 and Central London Builders Westminster SW1 and Central London – Marylebone W1, Mayfair W1, Pimlico SW1V, Bloomsbury WC1, Fitzrovia W1. London Clay foundation specialists. Westminster City Council planning managed. All trades in-house. Fixed price. Call 020 7129 7418.
Related Services
- House Renovation Chelsea – Complete Victorian terrace renovation.
- Kitchen Extensions Central London – Open-plan kitchen specialists.
- Loft Conversions Central London – Velux to mansard.
- Chimney Breast Removal Chelsea – Gallows brackets, party wall, building control.
- RSJ Installation Chelsea – Structural steel beam specialists.
- Builders Knightsbridge – Heritage and listed building specialists.
Builders Central London – Free Site Visit
Builders Central London extensions from £2,500/m², loft conversions from £45,000, structural alterations from £2,500, complete refurbishment from £100,000. Gas Safe. NICEIC. All trades directly employed. No subcontractors. Established 2000.
Free site visit – complications identified before the price is quoted. Fixed price within 72 hours. The price on the quotation is the price on the invoice. The accommodation cost of the programme is presented alongside the construction cost on every quotation.
📞 020 7129 7418
Chelsea Property Renovation & Maintenance Ltd. 289 Brompton Road, Knightsbridge, London SW3 2DY Company No: 16973999 | Established 2000 | Gas Safe | NICEIC | FMB
What our clients say about builders Central London
Read testimonials from satisfied homeowners across Chelsea, Knightsbridge, and Belgravia who trust us with their property renovation and maintenance needs.
“Our rear wall was demolished, the builder had disappeared, and winter was approaching. Chelsea Property Renovation arrived within 92 minutes of our call, had the property weatherproofed by Saturday morning, and started proper construction the following Thursday. Ten weeks later, we had a beautiful 25m² kitchen extension, building regulations approved, structural warranty provided. Completed under the original budget despite rescuing a disaster. One team. One fixed price. Exceptional builders in Kensington.”
James Ashworth - Kensington W8
Emergency Rescue and Kitchen Extension
“Complete renovation of our Rylston Road Victorian terrace. Lime plaster repaired correctly; hydraulic lime throughout, all gypsum repairs removed and replaced. Original cornicing cleaned to profile. Original cast iron fireplaces confirmed operational. Fixed price quoted and fixed price charged. Twelve weeks. The renovation our Victorian terrace deserved.”
Edward Cavendish - Fulham SW6
Complete Victorian Terrace Renovation
“Complete renovation of our Chelsea SW3 Victorian terrace: tadelakt bathroom, deVOL kitchen, full rewire, new heating, lime plaster repair and decoration throughout. All trades in-house, no subcontractors. Fixed price from site visit to handover. The accommodation cost saving versus the alternative was over £20,000. The Chelsea standard delivered exactly as described.”
Charlotte Forsythe - Chelsea SW3
House Renovation All Trades
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
Get Your Fast Quote for Central London Home Renovation
Ready to transform your Central London property? Get your fast quote today. Contact Chelsea Property Renovation & Maintenance Ltd
How much do builders Central London charge for extensions?
Builders Central London extension costs rear extension £2,500-£3,500 per m², side return £2,800-£3,800 per m², kitchen extension £40,000-£120,000+ complete, wraparound £80,000-£200,000+. All fixed prices include planning where required, party wall notices, building control, all trades Gas Safe, NICEIC, structural, joinery, decoration. All prices exclude VAT. Free site visit. Call 020 7129 7418.
Do you need planning permission for extensions in Central London?
Builders Central London planning most extensions in Chelsea SW3, Knightsbridge SW1X, and Belgravia SW1 conservation areas require planning permission due to Article 4 directions. Loft conversions may be permitted development, confirmed at site visit. Listed buildings require Listed Building Consent for any structural or external work. 400+ permissions secured. 95% RBKC and Westminster approval rate. Planning included in every fixed price. Call 020 7129 7418.
How long does an extension take in Central London?
Builders Central London extension timelines: planning 8-12 weeks for standard conservation area applications, 20-24 weeks for listed buildings requiring Historic England. Construction: 8-16 weeks for rear extensions, 10-18 weeks for side returns, 16-24 weeks for wraparounds. Total from site visit to handover: 16-28 weeks for most Chelsea and Knightsbridge extensions. Week-by-week programme with every fixed price quotation. Call 020 7129 7418.
Can you rescue a stalled building project in Central London?
Yes. Builders Central London emergency rescue the Kensington rear wall £85,000 deposit taken, builder disappeared, property exposed. Called Thursday 2:15 pm, arrived 3:47 pm, weatherproof by Saturday, construction started Thursday, ten weeks to handover. Retrospective building control managed. Structural calculations commissioned. Completed under original budget despite the rescue. Fixed price for the rescue programme confirmed at assessment. Call 020 7129 7418.
Are you Gas Safe and NICEIC-approved builders in Central London?
Yes. Builders Central London Gas Safe registered engineers for all plumbing, heating, and gas connections. NICEIC-approved electricians for all electrical work. We issue both certifications at handover on every project. A builder who subcontracts electrical and plumbing work cannot guarantee the sequencing and quality that all-trades-in-house delivers. All certifications issued at handover. Call 020 7129 7418.
Do you work on listed buildings in Central London?
Yes. Builders Central London listed building specialists Grade I, Grade II*, and Grade II across Chelsea SW3, Belgravia SW1, Knightsbridge SW1X, Kensington W8, and Westminster. Listed Building Consent managed. Oscillating tool cable chasing in lime plaster. Hydraulic lime repair. Heritage glass for sash windows where required. The Lowndes Square Grade II-listed Victorian townhouse was eight months old; the conservation officer praised the work at the final inspection. Call 020 7129 7418.
What areas do builders Central London cover?
Builders Central London coverage Chelsea SW3 and SW10, Knightsbridge SW1X, Belgravia SW1, South Kensington SW7, Kensington W8, Westminster SW1, Fulham SW6, Battersea SW11, Marylebone W1, Mayfair W1, Pimlico SW1V. Based at 289 Brompton Road, Knightsbridge, minutes from every address we serve. All trades in-house. Fixed price. Free site visit. All prices exclude VAT. 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
We Are Accredited
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.
