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 new basement dug beneath a Victorian terrace in St John's Wood: three new bedrooms with en-suite, a kitchen-diner and games rooms, 40 weeks on site.
Project facts
- HouseVictorian terrace
- Added+3,500 sq ft
- On site40 weeks
- Completed2023
- PlanningFull planning — new basement dig (Camden basement policy)
- Contract value£450,000 – £650,000 inc. VAT
Project type: Basement · Renovation · Area: St John's Wood NW8
What we did
- New basement excavation and underpinning
- Three new bedrooms and en-suite
- Kitchen and diner
- Games rooms
- Light wells
- Waterproofing to BS 8102
Specification
Wood Floors · Light Wells · Custom Kitches · Built Wardrobes · CP Hart Bathrooms
Design and build inclusive: architecture, structural engineering, planning, party wall, construction, project management and LABC sign-off under one contract.
Anderson's note
A basement is an engineering job with a house on top: underpinning sequence, waterproofing and the neighbours' party wall surveyors set the programme, not the finishes. Forty weeks is honest for 3,500 sq ft.
Anderson, founder — LCCL Construction, Finchley N3
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.

“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
“Contracted lccl construction to design and build hip to gable loft conversion, after much research I found Lccl construction to be the most efficient and reliable company to deal with, the initial design phases started immediately their architects attended…”
Behar · Trustpilot
“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






