Extension, loft conversion and new build specialists
Residential building done properly. Clear itemised pricing, one team from first visit to final handover, and a finish that lasts for decades.
Recent projects
Every photo is our own work. Click any project to see the full story, from first visit to finished result.
A building company that treats your home like it matters
Kelmend Construction delivers extensions, loft conversions, renovations and new build homes across London. From single-room refurbishments to full new builds, every project gets the same attention. Most of our work comes from referrals and returning clients, and we intend to keep it that way.
- ✓ One point of contact from your first call to handover
- ✓ Clear, itemised quotes, so you know exactly what you're paying for
- ✓ Clean sites, respectful teams, and neighbours kept happy
Everything your home needs, under one roof
Every service quoted, delivered and managed by Kelmend Construction.
Extensions
Rear, side return, double storey and wraparound extensions.
Learn more →Loft Conversions
Dormer, Velux, hip-to-gable and mansard. Free loft assessments.
Learn more →Renovations
Full house renovations, flats, kitchens, bathrooms and more.
Learn more →New Builds
New build homes from foundations to final handover.
Learn more →Roofing
Repairs, replacements, flat roofs, guttering and chimney work.
Learn more →External Rendering
Silicone rendering and external wall insulation.
Learn more →Landscaping
Patios, driveways, decking, fencing and garden walls.
Learn more →Painting & Decorating
Interior and exterior decoration with a lasting finish.
Learn more →What our clients say
Rated 5.0 on Google by the people whose homes we've worked on.
"From the beginning they acted very professionally, arriving to the initial meeting very prepared. During the build they were quiet and respectful of both ourselves and the neighbours. They came in within budget and within the time limit they quoted us. Will definitely use again."Lucian Stan Kitchen Extension · Bromley
"Their quick and efficient service, combined with a high level of professionalism, made the entire experience hassle-free. I highly recommend them for their top-notch craftsmanship and excellent communication. Thank you for a job well done."Samson Garden Wall & Bathroom · Charlton
"They have all the required skills for pretty much anything in house building. The quality of the work is fantastic. They even refurbished an old wooden external door so it now looks and works like new. Highly recommended."P. Laz Full House Refurbishment · Orpington
All reviews from our Google Business Profile.
Simple from start to finish
Free Consultation
We come to you, listen, and give you an honest assessment of what's involved before you commit to anything.
Detailed Quote
A fully itemised quote with clear scope, timeline and payment stages. No vague estimates, no surprises.
We Build It
Work starts on the agreed date. We manage trades, materials and programme, and keep you updated throughout.
Handover
A thorough snagging walkthrough before we close the job, and we stay reachable if anything comes up after.
Areas we cover
Based in South East London and working across the capital. Our core coverage includes:
Not listed? We take on projects across London. Just get in touch.
Ready to talk about your project?
Free consultation, no obligation. Just a straight conversation about what you want to build, followed by a clear itemised quote.
No pushy sales. No call centres. Just us.