Builders in Lewisham
Kelmend Construction is based in Sidcup and works across the London Borough of Lewisham: the Victorian terraces of Brockley, Hither Green and Catford, the Edwardian houses of Lee and Blackheath, and the interwar estates toward Grove Park.
Victorian terraces and Edwardian streets
Lewisham is one of the most varied housing boroughs in south east London, stretching from the densely Victorian streets of New Cross and Brockley in the north, through the terraces of Honor Oak and Crofton Park, to the greener Edwardian and interwar streets of Lee, Hither Green and Grove Park. The Victorian terrace with a rear outrigger is the dominant type, and it is the ideal candidate for a side return extension and an L-shaped dormer.
We're based in Sidcup, twenty minutes away, and have worked on terraces across the borough. Lewisham's conservation areas, Telegraph Hill, Brockley, Hither Green and others, are extensive, so we check your address before any design work starts.
Our services in Lewisham
Everything from a side return extension to a full terrace renovation, managed by one team. Extensions and loft conversions have their own Lewisham pages with local planning detail.
Extensions in Lewisham
Rear, side return, double storey and wraparound extensions on Lewisham's Victorian terraces and Edwardian houses. Planning, build and finish managed as one job.
See extensions in Lewisham →Loft Conversions in Lewisham
Hip-to-gable, dormer, Velux and mansard conversions. Free roof assessment before you commit to anything.
See loft conversions in Lewisham →Renovations in Lewisham
Full house renovations, kitchens, bathrooms and flat refurbishments across Lewisham, from structural work to final decoration.
Learn more →New Builds in Lewisham
New build homes and infill plots, from foundations to handover, with planning and building control managed throughout.
Learn more →Roofing in Lewisham
Roof repairs, full replacements, flat roofs, guttering and chimney work, with scaffolding and weatherproofing handled by us.
Learn more →External Rendering in Lewisham
Silicone, monocouche and sand-and-cement rendering, with cracked render repairs and external wall insulation.
Learn more →Landscaping in Lewisham
Patios, decking, garden walls, drainage and full garden landscaping that ties in with an extension or stands on its own.
Learn more →Painting and Decorating in Lewisham
Internal and external painting and decorating, usually as the finishing stage of a bigger project but available on its own.
Learn more →Planning in Lewisham
Lewisham is its own planning authority, distinct from Greenwich and Bromley. Its conservation areas are extensive and its design guidance for terraces is detailed.
Permitted development
Outside conservation areas, most single storey rear extensions and rear dormers on Lewisham's terraces are permitted development. We confirm the position for your address first.
Conservation areas
Telegraph Hill, Brockley, Hither Green, Ladywell, Forest Hill, Lee and others. Work visible from the street needs planning permission and matching materials.
Side returns and outriggers
Lewisham has specific guidance on side return extensions and L-shaped dormers on terraces. Designing to it from the start avoids refusals.
Timelines
Lewisham typically decides householder applications within 8 weeks of validation.
Party walls
Every terraced project involves the Party Wall Act, often on both sides. We flag it at the first visit.
Building regulations
Structural work, loft conversions and extensions all need building control approval, managed by us from start to sign-off.
Lewisham's conservation areas
The borough has extensive conservation areas, including:
We check your address against Lewisham's current maps at the consultation.
Why Lewisham homeowners choose us
Based in Sidcup
A local company with a local reputation to protect. Site visits, the build and any snag afterwards are a short drive, not a trip across London.
One accountable team
You deal with us throughout, not a project manager you've never met. We're on site, reachable, and answer the phone.
Planning handled
We advise on the planning route, work with architects who know the local council, and manage building control. You won't be chasing the council yourself.
Itemised, honest quotes
Fully itemised quotes with no vague allowances. Any changes are costed in writing before we proceed.
Built to regulations
Every structural project is signed off by building control, protecting your investment and avoiding problems when you sell.
Finished properly
We don't hand over a shell. Plastering, flooring, electrics, plumbing and decoration run as one programme so the job is finished, not nearly finished.
Lewisham and nearby
Based in Sidcup and working across the borough and beyond, including:
Not listed? We take on projects across south east London. Just get in touch.
Questions Lewisham homeowners ask
Do you cover all of Lewisham?
Yes. We work across the whole of Lewisham and the surrounding areas. Most of our projects are within a short drive of our Sidcup base, which keeps site visits, deliveries and snagging quick.
How much do builders in Lewisham charge?
It depends entirely on the job. As a guide, single storey rear and side return extensions run £1,500 to £2,200 per square metre fully finished, loft conversions from around £35,000 for a dormer, and full house renovations are priced room by room. Every quote is itemised so you can see exactly where the money goes.
Do you handle planning permission with Lewisham Council?
Yes. We advise on whether your project needs planning permission or falls under permitted development, work with architects who know Lewisham Council, submit the application and manage building control through to sign-off.
Can I see examples of your work?
Our projects page has full photo write-ups of recent extensions, loft conversions, refurbishments and gardens, and we're happy to put you in touch with past clients nearby.
How do I get a quote?
Call 020 8226 0221 or use the quote form. We'll visit your Lewisham property, talk through what you want and come back with a fully itemised quote. No pressure, no call centres.
Are you insured and do you provide a contract?
Yes. We carry public liability insurance and every project runs on a written contract setting out scope, timeline, stage payments and how any changes are handled.
Need a builder in Lewisham?
Tell us about your project and we'll come round for a free, no-obligation consultation.
No pushy sales. No call centres. Just a straight conversation about your Lewisham project.