LCCL Construction Services
Award-winning design and build services across London and Hertfordshire
LCCL Construction is an award-winning design and build company based in Finchley, North London. With over 20 years of experience and more than 200 verified reviews rated 4.7 out of 5, we deliver complete construction services from initial architectural design through to final handover.
We are LABC Awards Regional Winners 2024 for Best Residential Extension in London, members of the National Federation of Builders, and LABC Registered Partners. Every project is managed by our in-house team of architects, structural engineers and experienced builders, giving you a single point of contact from start to finish.
Whether you are planning a loft conversion, house extension, full home renovation, new build or need standalone architectural services, we handle everything including planning applications, building regulations, structural calculations, party wall agreements and construction. All projects include optional 10-year LABC warranties for complete peace of mind.
LABC Awards
Winners 2024
200+ Reviews
4.7 / 5 Rating
NFB Members
LABC Partners

We build all types of house extensions including rear, side return, wraparound and two-storey extensions. Every project includes full project management, plumbing and electrical packages, and optional 10-year LABC warranties. We work within permitted development rights where possible, saving you time and planning costs.
From design to completion, we deliver new build homes including detached houses, terraced properties and flats. Our design and build service covers architecture, planning applications, structural engineering and full construction. No deposit required, with optional LABC 10-year warranties on every project.
We specialise in all loft conversion types including dormer, hip-to-gable, mansard, L-shaped and Velux conversions. Each project is managed from architectural design through to completion, with plumbing and electrical packages included. Optional 10-year LABC warranties available, and we work within new permitted development rights where applicable.
Our renovation service covers everything from flat and apartment refurbishments to full house renovations. We offer a complete design and build package including kitchen and bathroom fitting, flooring, doors, wardrobes, plumbing and electrical work. Total finishing options available to suit your budget and style.
As a full-service design and build company, we handle your project from concept to completion. Our in-house architects and builders work together to deliver loft conversions, house extensions, renovations and new builds. All projects include LABC partnership, structural calculations, and optional 10-year warranties.
Our architectural services include measured building surveys, schematic drawings, planning and building control applications, structural calculations, party wall agreements and full project management. Available as a standalone service or as part of our complete design and build package.
What Our Customers Say
LCCL Construction were professional from start to finish. The team were trustworthy, reliable and delivered work to the highest standard. We would highly recommend them for any construction project." — KashImaging, Trustpilot
We used LCCL for our rear extension and were so impressed that we came back for a loft conversion. The quality of work and communication throughout was excellent. Highly recommend." — Mia M, Google Reviews
From the initial consultation to the final handover, everything was handled with precision and professionalism. The project was completed on time and on budget. Outstanding service." — Alex Gray, Google Reviews
Areas We Cover
Based in Finchley N3, serving London and Hertfordshire.
North London and Hertfordshire
Barnet | Finchley | Hendon | Muswell Hill | Edgware | Enfield | Borehamwood | Potters Bar | Watford | St Albans
Across London
Hampstead | St Johns Wood | Islington | Kensington & Chelsea | Fulham | Clapham | Richmond | Putney & Wandsworth | Crouch End | Stoke Newington | Highgate | Ealing | Notting Hill | Camden | Queens Park
Regional
Frequently Asked Questions
Q1: What services does LCCL Construction offer?
LCCL Construction offers a complete range of design and build services including loft conversions, house extensions, home renovations, new builds and architectural design. We handle everything from initial consultation and planning applications through to construction and final handover. Our architectural services are also available as a standalone package for clients who need design and planning only.
Q2: Do you offer a design and build service?
Yes, we are a full design and build company. This means our in-house architects and construction teams work together on your project from start to finish. You get a single point of contact throughout, which simplifies communication and ensures design intent is carried through to the build. Our design and build service covers architectural drawings, planning applications, building regulations, structural calculations, party wall agreements and full construction.
Q3: What areas do you cover?
We are based in Finchley, North London and cover all of London and Hertfordshire within an 85-mile radius of our office. We regularly work in areas including Barnet, Enfield, Hampstead, Muswell Hill, Crouch End, Highgate, Borehamwood, St Albans, Radlett, Potters Bar and throughout Central, North, South, East and West London.
Q4: How much do your services cost?
Costs vary depending on the type and scale of your project. As a guide, loft conversions typically start from around £40,000 to £45,000, rear house extensions from around £50,000, and full home renovations depend on the scope of work. We offer free no-obligation consultations and can provide an instant online quote through our website to give you an initial estimate before we arrange a site visit.
Q5: Are you accredited and insured?
Yes. LCCL Construction are LABC Awards Regional Winners 2024 for Best Residential Extension in London, members of the National Federation of Builders, and LABC Registered Partners. We carry full public liability and professional indemnity insurance, and all projects include optional 10-year LABC warranties.
Q6: What is the first step to starting a project?
The first step is to book a free consultation call through our website or call us on 020 8037 7332. During the consultation we will discuss your project requirements, budget and timeline. We can then arrange a site visit and measured building survey to provide you with a detailed design proposal and fixed-price quote.









