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 mansard roof extension and reconfiguration of a Georgian terrace in Marylebone: open-plan kitchen, two bedrooms and a roof terrace, taken through Westminster planning.
Project facts
- HouseGeorgian terrace (c.1775)
- Added+2,000 sq ft
- On site35 weeks
- Completed2018
- PlanningFull planning + listed building consent (Westminster)
- Contract value£250,000 – £350,000 inc. VAT
Project type: Mansard loft · Renovation · Area: Marylebone W1W
What we did
- Mansard roof extension
- Open-plan kitchen
- Two bedrooms
- Roof terrace
- Westminster planning and conservation consent
Specification
New Kitchen · Lusso Stone · Italian Marble Floors
Design and build inclusive: architecture, structural engineering, planning, party wall, construction, project management and LABC sign-off under one contract.
Anderson's note
A mansard in Westminster is a planning project first and a build second — the roof form, the slate and the dormer proportions all have to match the terrace. Thirty-five weeks on site reflects working inside a Georgian structure.
Anderson, founder — LCCL Construction, Finchley N3
The client's view
“Professional reliable and organised loft conversion company would highly recommend”
Verified client · EmbedSocial 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 used Lccl construction first time for our kitchen extension 2019 with a view to build a loft conversion afterwards. We just have had our loft conversion completed including bedroom, bathroom, storage loft it has Juliet balcony with velux windows to the…”
Tracie · Trustpilot
“We engaged with LCCL Construction to get our loft conversion and house extension project going. The whole process was explained to us in a straight forward way including how the design stages work, timescales, what to expect during the build and the costs…”
Daniel Freedman · Trustpilot
“I highly recommend LCCL Construction. They completed our loft conversion to a very high standard, and the quality of workmanship throughout was excellent. The team was professional, reliable, and completed everything within a very reasonable timeframe.…”
Alina A · Google Reviews