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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A 3 × 10 m single-storey rear extension on a modern semi in Millbrook Park: a large kitchen and dining space with bifold doors and skylights, and a separate utility room so the kitchen stays quieter and gains cupboard space. Scheduled for 12 weeks, finished in 10.
Project facts
- House2000s semi-detached
- Added+500 sq ft (3 × 10 m)
- On site10 weeks
- Completed2023
- PlanningPermitted development
- Contract value£100,000 – £150,000 inc. VAT
Project type: Kitchen extension · Area: Mill Hill NW7
What we did
- 3 × 10 m single-storey rear extension
- Large modern kitchen and dining space
- Separate utility room
- Bifold doors and skylights
- Underfloor heating, fully tiled floor
- Landscaping
Specification
Wren kitchen · Underfloor heating · Bifold doors · Skylights · Fully tiled floor · Landscaping
Design and build inclusive: architecture, structural engineering, planning, party wall, construction, project management and LABC sign-off under one contract.
Anderson's note
On a house this new the ground floor is already open, so the job is really about the roof and the light: we put the skylights over the island before the kitchen layout was fixed, not after.
Anderson, founder — LCCL Construction, Finchley N3
The client's view
“We did a 3 × 10 m single storey rear extension with LCCL recently. It was scheduled to take 12 weeks to complete but with Alex's experience and agile project management we finished in 10. Alex and LCCL are extremely knowledgeable and will work with you explaining what can, and cannot, be done and why. With Alex you know no corners will be cut: your house will be sturdy, warm, waterproof, and will look nice. Without doubt I would choose LCCL again for any future building project.”
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.

“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 to our house in North London.”
Mia M · Google Reviews
“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
“LCCL Construction was the right company to help with my loft conversion. I heard of other people's challenging experiences with building works so I was very careful which company I chose. LCCL Constructions was professional, trustworthy and worked to the…”
KashImaging · Trustpilot






