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House extension builders London
Rear house extension builders London
House design and build London

LCCL Construction has designed and constructed a new build house in London

LCCL CONSTRUCTION LONDON

Specialist House Extensions and House Builders Design and Build Company

ABOUT US

We are a design and build company located in London, United Kingdom, dedicated to transforming your living spaces. Our range of services encompasses the design and construction of various types of properties, including houses, flats, and apartments. Whether you’re looking to enhance your’s interior or exterior, we have you covered. Our expertise includes creating stunning house extensions, converting lofts into functional spaces, and undertaking comprehensive renovations that involve all aspects of internal finishes, ensuring that every detail meets your vision and standards.

Transform your home into your dream space with Lccl Construction London! Our expert team specialises in loft conversions and house extensions in London and Hertfordshire. Let us bring your ideas to life with our award-winning services!

Covering London and Hertfordshire, United Kingdom and Surrounding Areas

Located in Finchley, N3 London

Loft Conversion Company London

LCCL Construction has designed and constructed a two-floor duplex apartment and a mansard loft conversion in Hampstead, Camden, London, NW6 Check out the project in detail!

Leading design and build company London

LCCL Construction design and construction of ground floor house extension, internal renovation and loft conversion in London

London Number 1 Award Winning Residential House Builders and  House Extension Design and Build Company

Excellent

4.7 out of 5 based on 200 reviews

Extremely professional and personable company - highly recommended

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.

Ludovic, 7 February

LCCL Construction was the right company…

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 highest standard. 

KashImaging, 8 January

LCCL construction trustpilot reviews

Very happy with the services provided…

In just over 6 months LCCL they managed to transform my damp, musky, 1900s mid-terrace house in dire need for 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 - ...

Matt EL, 01 July

houzz reviews lccl construction

2ND PROJECT WITH LCCL

We are very happy with the services from Lccl, Lccl has done a great job on design and construction. We have used Lccl in the past for our rear house extension and have come back to instruct Lccl for our loft conversion too to our house in North London.

Mia M, 15 December

google reviews

LCCL Did An Excellent Job

Reliable, fast, trustworthy and very organised we had many people on site working at the same time and the work progressed very quickly. Our extension and loft conversion look great and we would recommend.

Alex Gray, 24 May

Accreditations and awards

Lccl Construction National Federation of Builders
Labc Awards Regional Winner 2024 Lccl Construction
Planning Portal
Best of Houzz Services 2026 Lccl Construction
Lccl construction on houzz
LABC Registered Partner Lccl Construction

Loft conversion company, house extension builders, new builds, architecture services. Lccl Construction London is your premier architecture and construction service provider. Specializing in loft conversions and house extensions, we offer our award-winning services within an 85-mile radius from Finchley, London. Trust our experienced professionals to transform your home.

Loft conversion company

dormer loft conversions

hip to gable loft conversions

mansard loft conversions

L shaped loft conversions

velux loft conversion

optional LABC 10 year warranty

plumbing and electrical packages

design and build loft company london

new permitted development rules applied

House extension builders

rear house extension builders

kitchen extension builders

side return extension builders

wraparound and side return house extension 

optional LABC 10 year warranty

plumbing and electrical packages

design and build company in London

New permitted development rules applied

Design and build company

design and build company in London, UK

design and build of loft conversions

design and build of house extensions

design and build new houses

optional LABC 10 year warranty

local authority building control partner

party wall and structural drawings and calculations

Architecture design services

Architecture, Design and Planning

Measured building survey

Schematic drawings Consultation and Party Wall Agreements

Project Management

Structural Drawings and Calculations Planning and Building Control Application

Home renovation company

Flat and Apartment Renovations

House Renovations

Design and Build

Plumbing and Electrical 

Supply and Install Kitchens, Bathrooms, Flooring, Doors or Wardrobes

Total finishing options

New home builder London

new home build schemes

design and construction

architecture design and planning 

LABC 10 year warranty

no deposit required

plumbing and electrical packages

New permitted development rules applied

Party wall surveyors FPWS

We can serve party wall notices, serve full party wall awards, liaison with 3rd party surveyors. Our party wall agreement services are conducted by surveyor who is MCIOB and FPWS accredited.

Structural engineer drawings

The design would be detailed as per what type of timbers to use, thickness of the steels, type of concrete to be used, is a slab or block and beam floor, what type of steel connections to be used and more..

Construction and Management

We do construction and project management as part of our design and build services, with our construction management services we build loft conversions, home extensions, renovations and new builds.

Construction and management

Find out more about our construction process and stages for your project, how do we go about running our construction project and what are the core elements associated in the construction process.

House extension builders London

Lccl Construction unique construction process and design and build process for loft conversion and home extension 

Find out more about Lccl Construction unique construction process or design and build process and what happens on the design or construction stage. 

Step by step explanation of loft conversion, home extension and new build design and construction process. 

We have included our original project images taken on our construction projects.

Rear house extension builders London

Lccl construction loft conversion company design and build in London and Hertfordshire, United Kingdom is a specialist loft conversion company, house extension builders, new house builder, architectural designers and planning company. With our end to end services we successfully start and finish every one of our projects. With our design and build construction company services we can complete all the stages of your build from consultation, architecture, survey to construction including plumbing and electrical installations under one roof. Our combined services includes planning, architectural design and construction. 

By providing services from start to finish we will deal with architecture, planning applications, planning negotiations, building control drawings, building control application, party wall survey and agreements, structural and construction drawings, production of the construction schedule, interior design, construction phase, dealing with building control during construction, electrical and plumbing installations, completion of the construction, certificate and Local Authority Building Control sign off. 

House Extension Company London Limited trading as "Lccl Construction" Registration: 16618197

We cover all areas in London, Hertfordshire, United Kingdom. Our offices are located in 3rd Floor, Hathway House, Popes Drive, Finchley, London N3 1QF. The radius is 85 miles from our office location. Our phone number is: Phone 020 8037 7332

What is a design and build company?

The design and build concept means that multiple specialist skills and trades are combined into one, from start to finish we will deal with all the architecture, consultation, planning and thereafter the entirety of the  construction, saving both time and capital.

We will help you plan, design and build your house extension or loft conversion every step of the way. 

 

Find out more about successfully completed Lccl Construction design and build projects portfolio

Design and build company London

Architectural design, survey and construction services under one umbrella

We are your one stop architectural design, survey, project management, construction services company. We take care of everything required for your loft conversion, home extension or renovation project. Meaning we will complete the design phase and construction phase for you, without the need to look anywhere else and you have only one point of contact for everything.

Design phase: 

  • Building measured survey

  • Architecture services

  • Planning application

  • Building control application

  • Party wall agreements 

  • Structural engineers calculations and design

  • Project management

  • Interiors

 

Construction Phase:

  • Construction of loft conversions and home extensions

  • Project management

  • Logistical supply and coordination

  • Quality control

  • Liaison with building control and inspection

  • Guarantee

In short there are 10 stages of the design and build process. Starting with a contact, consultation, quote, full survey, planning permission drawings, building regulation drawings, structural calculation drawings, party wall agreements and construction.

 

Lccl Construction is one of the  leading construction companies in North London,construction companies in London and construction companies in Hertfordshire, United Kingdom. We are a specialist loft conversion company, house extension builders, design and build company London. With our architecture services, design and build solutions we are able to deliver any type of loft conversion, house extension, both in the London and Hertfordshire areas.

Have a look at the design and build process stages in more detail lccl construction design and build process

Why choose Lccl construction for your loft conversion or house extension

At Lccl Construction we have carried out many design and build loft conversions and house extension projects in London, Hertfordshire, United Kingdom. We design and build London loft conversions turning them into beautiful spaces. Our aim is to make the process of house extensions or loft conversions as simple as possible, hassle free and stress free for a loft conversion in London and house extension in London.

 

Some of the customers that live in London and Hertfordshire are looking for extra space due to a growing family or the need for additional space for a home office or some like to invest in their property. Whatever the reason we design and build loft conversions in North London, London and Hertfordshire.

House design and build London
House extensions and house builders London

7 reasons to choose

LCCL Construction

1. Insured, Registered and Accredited Construction Company

2. Total Architecture, Construction and M&E Services Under One Roof

3. Fully Detailed Quotes on Small, Mid & Large Projects

4. Efficient and Professional services

5. Located locally London, United Kingdom 

6. Small Deposit

7. Optional LABC Warranty 10 - 12 years

Finchley, London Office Location:

3rd Floor, Hathway House, Popes Dr, Finchley, London N3 1QF

Office Hours:

Monday to Saturday 8AM - 6PM

Sunday - Closed

Telephone:

020 8037 7332

Email:

Registered company England:

House Extension Company London Limited. Trading as "Lccl Construction" Registration: 16618197

LCCL Construction

LCCL Construction

LCCL Construction Specialist loft conversion company, house extension builders, new build, house builders, architectural design and planning. Design and build construction company from start to finish including architecture, planning, building control, party walls, structural calculations, project management, construction and finishing.

Award winning construction company London and Hertfordshire

LCCL Construction is an award-winning construction company that has been recognised by NFB, LABC, and Houzz Awards for its exceptional construction services. With 18 years of experience in design and build, we are committed to delivering high-quality construction services to our clients. Trust us to bring your vision to life.

Labc Awards Regional Winner 2024 Lccl Construction
NFB Awards LCCL Construction
Best of Houzz Services 2026 Lccl Construction

Accreditation, partnerships and planning:

Lccl construction on houzz
Lccl Construction National Federation of Builders
LABC Registered Partner Lccl Construction
Planning Portal
Lccl Construction on Trustpilot

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Copyright 2006 - 2026 all rights received. Architecture services, house extension builders, loft conversion company and design and build company London & Hertfordshire, United Kingdom. By using our services you agree to our privacy policy and terms and conditions.

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