Loft conversions, house extensions, renovations, basements and new builds across London and Hertfordshire.
Services
Loft conversions, house extensions, renovations, basements and new builds across London and Hertfordshire.
Services
Loft conversions, house extensions, renovations, basements and new builds across London and Hertfordshire.
Services
Loft conversions, house extensions, renovations, basements and new builds across London and Hertfordshire.
Services
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LABC Building Excellence Award 2024 — Best Residential Extension in London — View the certificate
A family semi in East Barnet renovated top to bottom: a full-width rear extension for an open-plan kitchen-diner, a hip-to-gable loft with rear dormer for a master suite, two new bathrooms, new windows throughout, a regulated outbuilding and a landscaped garden — all under one contract.
Project facts
- House1930s semi-detached
- Added+1,000 sq ft
- On site30 weeks
- Completed2023
- PlanningHouseholder planning (extension) + permitted development (loft)
- Contract value£395,000 – £475,000 inc. VAT
Built under permitted development. Part of this project was built under permitted development and part went through a planning application — see the planning line above. How permitted development loft and extension projects work
Project type: Rear extension · Hip-to-gable loft · Renovation · Outbuilding · Landscaping · Area: East Barnet EN4
What we did
- Hip-to-gable loft with rear dormer
- Full-width rear extension with floor-to-ceiling glazing and skylights
- Two Lusso Stone bathrooms
- Enlarged bedrooms, new windows
- Regulated outbuilding
- Landscaping
Specification
Lusso Stone · Buster + Punch
Design and build inclusive: architecture, structural engineering, planning, party wall, construction, project management and LABC sign-off under one contract.
Anderson's note
The steel for the open-plan ground floor and the new loft floor was designed together and craned in on the same day — one crane hire, one scaffold, one building-control file. Doing the loft and the extension as one programme is what made the budget work.
Anderson, founder — LCCL Construction, Finchley N3
The client's view
“We are very happy with the services from LCCL. Alex has done a great job on design and construction. We have used LCCL in the past for our rear house extension and have come back to instruct LCCL for our loft conversion too. We highly recommend their design and construction services for both home extension or loft conversion.”
Verified client · Google Reviews
As LABC Building Excellence Award Winners 2024 for Best Residential Extension in London, and 2026 London Regional Winners for Best Conversion or Alteration, every project runs under one contract with a 12-month workmanship guarantee and a 10-year LABC structural warranty.
One team, one contract, one point of contact — from first sketch to handover.
“2ND project with LCCL construction wraparound house extension. Completed full design and build process to our home in Finchley north London. Previously they have design and build our loft conversion 4 years on and still it is in excellent condition.…”
Anthony · Trustpilot
“The Lccl construction team built my extension with a quick and clean service, they worked non stop through the winter weather.. I would highly recommend this company!”
Chris Dunn · Google Reviews
“Rear house extension 6x3m and dormer loft conversion completed with LCCL Construction, finished the whole project in 14 weeks very happy with the outcome, highly skilled and experienced design and build company a perfect match for our house. Would highly…”
Fran S · Reviews.io