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LCCL Construction – design and build company, London N3
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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

Call 020 8037 7332 or get an instant estimate online.

Boundary Road NW8 — LCCL Construction project

Boundary Road NW8

Basement · Renovation — Victorian terrace — Completed 2023

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.

How design and build works

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.

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Planning something similar?

Get an instant estimate for your postcode, or book a free 30-minute call with our team. Call 020 8037 7332, Monday to Saturday 08:00–18:00.

What clients say

Verified reviews, quoted exactly

average rating is 5 out of 5
“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

average rating is 5 out of 5
“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

average rating is 5 out of 5
“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

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