Why Choose Us?

Fully Detailed Quotes on Small, Mid & Large Projects

Located Locally 

Fully Qualified Team

No Upfront Payments

No Deposits

Guarantee 10 years

Insured and Accredited Construction Company

Efficient and Professional services

Construction Company London and Hertfordshire

Total Building and M&E Services Under One Roof

Fully Vetted and Accredited Engineers GAS SAFE and NICEIC REGISTERED

Planning Portal
Lodon and Hertforshire Construction Awards
National Federaion Of Builders Accredited
Get in touch with us:

Address:  Unit 720 Catalyst House, Centennial Park, Centennial Avenue, Borehamwood, WD6 3SY

Telephone: 020 8037 7332

**Attendance By Appointment Only.**

We Serve London and Hertfordshire 20 Mile Radius from our Base in Barnet and Borehamwood.


Loft Conversions Company, House Extensions, Builders in Barnet, Elstree, Bushey, Borehamwood, Hadley Wood, St Albans, Potters Bar, Brent, Camden, Ealing, Enfield, Hammersmith and Fulham, Harrow, Kensington and Chelsea, Rickmansworth and Hertfordshire. Builders in LondonNorth London and North West London.

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Copyright 2006 - 2020 All Rights Received. Company Number: 11713461.

House Extension Builders and  Loft Conversion Company London & Hertfordshire

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Architecture Design and Build Services

Covering London and Hertfordshire - United Kingdom

" We hold £10m Public Insurance

£5m Employers and All Risk Total Insurance to give you peace of Mind! " 

“We understand the projects are and can be complicated and not easy to understand. Lccl Construction makes the process simple” 

Architecture Services

Architecture Design

Planning Application Services

Structural Design and Calculations

Design and Build

Party Wall Agreements 

Prices From £750

We cover London and Hertfordshire Areas, Based in Borehamwood and Barnet

London and  Hertfordshire Architectural Designers

Borehamwood, Hertfordshire Architectural Designers

Barnet, Hertfordshire Architectural Designers

East Barnet, London Architectural Designers

St Albans, Hertfordshire Architectural Designers

We understand the projects are can be complicated and not easily to understand. At Lccl we have developed an easy and simplified ways to understand each stage of the process and we have joined up with LABC Partner program to smooth out the process. Our membership with LABC Partner program enables us to work with Local Councils and deliver results more efficiently, however we also have our partner architects and structure engineers  that we work with in order to achieve simplified processes in construction as a whole. 

Our design and build services works as one in house process to guarantee your project will be delivered with high quality and efficiently from inception to completion.

The process of design and build stages and how does it work?

  1. Contact - Fist of all we will book with you a consultation of in-depth understanding of what you would like to achieve or what the project idea is

  2. Consultation - This will follow with an appointment with our partner architect who will either meet you at your location or at the offices for in-depth analysis of the project

  3. Quote - Once we understand your project and what you would like to achieve the estimate will be produced for your acceptance

  4. Full Survey - Building projects that involve home extensions, home renovations and loft conversions will require a full measured survey of the existing property and surrounding site. We can then produce a set of accurate survey drawings using CAD software, which will include plan, elevation and section drawings.

  5. Planning Permission Drawings - Our Planning drawings service consists of fully investigating your Local Authorities planning guidelines, producing proposed plans, elevations, site layout, cross sections, outline specification and a location plan and producing a Design and Access statement if required. Obtaining and completing planning application forms on your behalf. Liaising with your local authority and keeping you informed of any feedback. With these set of drawings you will be able to: Make a Planning application submission - Make a Permitted Development application to receive a Certificate of Lawfulness for your extension or loft conversion.

  6. Building Regulation Drawings - Once planning permission has been granted the next stage is Building Control. These drawings are very detailed and show exactly how and with what materials the new building or extension is going to be constructed. A full set of Building Regulation drawings will include proposed plans, elevations, cross sections, details, full specification detailing construction methods, workmanship standards and quality of materials.

  7. Structural Calculation Drawings - When all approvals have come in the structural process will start, this is an important part of the design as that will present a clear scope of how to achieve the construction of the project, The project will not be able to start without the structural drawings.

  8. Party Wall Agreements - Generally any structure alteration within 3 meters of a party wall will require party wall agreement and notices.

  9. Construction and Completion - Once the project starts on site the construction process it will be monitored and inspected all the time by LABC and it will be signed off by LABC, this where all the teams will focus on your project to get it completed at high standard.

Architecture Drawings House Extensions

North London, London Architectural Designers

"Great services from start to finish most. Very helpful just what I needed. Professional architecture! "

Monica W. 

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Architecture Borehamwood Elstree
Architecture Services Barnet
Architect Services Near Barnet
Architecture Design Build Loft Conversions