Complete design and build: house extensions, loft conversions, renovations, architecture and new builds from one in-house team. Over 20 years across London and Hertfordshire.
About LCCL Construction
LCCL Construction is a design and build company based in Finchley, North London. We specialise in house extensions, loft conversions, home renovations, new builds, and full architectural services across London and Hertfordshire.
With over 20 years of experience and more than 200 reviews rated 4.7 out of 5, we handle every stage of your project: from initial design and planning through to construction and final handover.
We won the LABC Building Excellence Award for Best Residential Extension in London 2024. We are members of the National Federation of Builders and LABC Registered Partners.
Services
Architecture, structural engineering, planning, construction and finishing: all delivered by our own team. No subcontractors you've never met.
Add a bedroom, bathroom, and significant value without losing garden space. Dormer, hip-to-gable, L-shaped, and mansard conversions.
Open-plan kitchens, extra bedrooms, wraparound living spaces. Rear, side return, double-storey and wraparound extensions designed and built by one team.
One company from first sketch to final finish. Architecture, planning, construction and project management: all under one roof.
In-house architects and structural engineers. Measured surveys, planning drawings, 3D visualisations, building regulations and party wall agreements.
Full house refurbishments, kitchen and bathroom renovations, structural alterations, rewiring, replumbing and complete interior fit-outs.
Complete new build and knock-down-rebuild projects. Architecture, planning, construction and finishing from foundation to handover.
Also offering: Rear House Extensions, Kitchen Extensions, Ground Floor Extensions, Side Return Extensions, Wraparound Extensions, Loft Conversion & Extension, Dormer Loft Conversions, Hip-to-Gable, L-Shaped Loft Conversions, Mansard Loft Conversions, Measured Building Surveys, Party Wall Surveyor, Project Management, Structural Engineer Calculations, Building Regulation, Planning Permission.
How It Works
We listen to your ideas and give honest advice on what's achievable. No obligation, no hard sell.
Our architects produce detailed drawings. You receive an estimate covering architecture, planning, construction and warranty.
We handle planning applications, building regulations, structural engineering and party wall agreements. You approve: we do the paperwork.
Your dedicated project manager coordinates every trade on site. Typical builds take 10 to 20 weeks depending on scope.
Final inspections, building control sign-off, and your optional 10-year LABC warranty. We don't leave until you're satisfied.
Recent Work
Client Reviews
Super professional and on the ball at all times. He always thinks ahead and won't let you down. All his teams, from bricklayers, carpentry to electrics, roofing, tiling, painting, flooring and plumbing are excellent and hard working. They are all friendly yet professional. They are conscientious and want the job to be well done.
In just over 6 months LCCL managed to transform my damp, musky, 1900s mid-terrace house in dire need of repair into a clean and modern living space: loft conversion, full rear extension, patio, outside rendering fixes, new doors and windows and complete electrics and plumbing rehaul.
Reliable, conscientious, and finished to a high standard. The dedicated project manager kept us informed throughout, and every trade on site clearly took pride in their work. The team turned our brief into a finished build that genuinely exceeded what we'd hoped for.
Why LCCL Construction
Architecture, structural engineering, planning, construction and finishing: all in-house. No subcontractors you've never met.
LABC Building Excellence Award winners 2024 for Best Residential Extension in London.
Architecture, planning, building control, construction and optional warranty all clearly itemised: no nasty surprises.
Two decades of design and build across London and Hertfordshire, and 350+ projects delivered.
4.7 out of 5 across Reviews.io and Houzz. Read what our clients actually say about working with us.
Underwritten by the UK's largest network of building control professionals. Peace of mind, in writing.
Areas We Cover
FAQs
Costs depend on size and specification. Single-storey rear extensions typically start from £35,000, double-storey from £100,000, and wraparound extensions from £85,000. We can include architecture, planning, construction and an optional 10-year LABC warranty, or build an entirely bespoke tailored design and build package.
Most loft conversions take 8 to 12 weeks on site. Allow 8 to 12 weeks before that for design, planning, and building regulation drawings. Total timeline from first contact to completion is usually 4 to 6 months.
Depends on the level of services you need: can be everything, partial, or just shell finish. Architectural design, structural engineering, planning applications, building control, project management, all construction and an optional 10-year LABC warranty.
Yes, completely. Our in-house architects prepare all drawings and submit directly to your local council. This includes full planning applications, Lawful Development Certificates and heritage statements for conservation areas.
Call 020 8037 7332 or send us an email. We'll visit your property, discuss your ideas and give you honest advice with no obligation. Most consultations are arranged within a few days.
Get In Touch
Tell us what you have in mind. Most consultations are arranged within a few days: we'll come to you, look at the space and give you a clear plan and quote.
No obligation, no hard sell. Just honest advice on what's achievable for your home.
Email Us Call 020 8037 7332