Builders in Sidcup
Kelmend Construction is based in Sidcup. Extensions, loft conversions, renovations, new builds, roofing and rendering for the homes of DA14 and DA15, built by a company whose reputation lives here.
A Sidcup building company
We're based in Sidcup, which means the streets we build on are the streets we drive down every day. The 1930s semis of Blackfen, Lamorbey and Albany Park, the Edwardian houses around the station and Halfway Street, the cottage-style estates of The Hollies and Longlands, the larger plots around Lamorbey Park and The Green: we know what each one is made of and what it takes to extend, convert or renovate it well.
Sidcup has eight conservation areas, more than any other part of the borough, so knowing which streets need planning permission and which fall under permitted development is worth real money before a drawing is produced. We work with architects who know Bexley Council and manage the whole process from first visit to building control sign-off.
Our services in Sidcup
Everything from a rear extension to a full house renovation, managed by one team. Extensions, loft conversions and renovations have their own Sidcup pages with local planning detail.
Extensions in Sidcup
Rear, side return, double storey and wraparound extensions on Sidcup's 1930s semis and Edwardian houses. Planning, build and finish managed as one job.
See extensions in Sidcup →Loft Conversions in Sidcup
Hip-to-gable, dormer, Velux and mansard conversions. Free roof assessment before you commit to anything.
See loft conversions in Sidcup →Renovations in Sidcup
Full house renovations, kitchens, bathrooms and flat refurbishments across Sidcup, from structural work to final decoration.
See renovations in Sidcup →New Builds in Sidcup
New build homes and infill plots, from foundations to handover, with planning and building control managed throughout.
Learn more →Roofing in Sidcup
Roof repairs, full replacements, flat roofs, guttering and chimney work, with scaffolding and weatherproofing handled by us.
Learn more →External Rendering in Sidcup
Silicone, monocouche and sand-and-cement rendering, with cracked render repairs and external wall insulation.
Learn more →Landscaping in Sidcup
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 Sidcup
Internal and external painting and decorating, usually as the finishing stage of a bigger project but available on its own.
Learn more →Planning in Sidcup
Sidcup sits in the London Borough of Bexley. Most of the interwar streets have straightforward permitted development scope, but eight conservation areas change the rules street by street.
Permitted development
Outside conservation areas, most single storey rear extensions, rear dormers and hip-to-gable conversions on Sidcup's semis are permitted development. We confirm the position for your address before design work starts.
Conservation areas
Christ Church, The Green, Halfway Street, The Hollies, Longlands Road, Old Forge Way, The Oval and Willersley Avenue. Work visible from the street in these areas needs planning permission.
Article 4
Old Forge Way carries an Article 4 direction removing some permitted development rights, so even modest work there needs a full application.
Timelines
Bexley Council typically decides householder applications within 8 weeks of validation. We build that into your programme.
Party walls
Almost every project on a semi-detached or terraced house involves the Party Wall Act. We flag it at the first visit so notices go out early.
Building regulations
Structural work, loft conversions and extensions all need building control approval. Bexley building control inspects at key stages and we manage the whole process.
Sidcup's conservation areas
Eight conservation areas cover parts of Sidcup:
Boundaries are not always obvious from the street. We check your address against Bexley's current maps at the consultation.
Why Sidcup 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.
Sidcup 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 Sidcup homeowners ask
Do you cover all of Sidcup?
Yes. We work across the whole of Sidcup 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 Sidcup charge?
It depends entirely on the job. As a guide, single storey rear 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 Bexley Council?
Yes. We advise on whether your project needs planning permission or falls under permitted development, work with architects who know Bexley 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 Sidcup 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 Sidcup?
We're based here. 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 Sidcup project.