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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House Extensions Builders

House extensions Builders 

Single storey home extensions at side and rear

Double extensions

Two storey home extensions at side and rear

Based in Barnet and Borehamwood Covering London and Hertfordshire

" We hold £10m Public Insurance

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

"5 out of 5 stars home builders would recommend and use again."

Jessica Gibney. 

Book a Free Consultation

Or Call us Today

Single storey Extensions, Double storey Extensions, Side and Rear Home Extensions.

House extensions builders London and Hertfordshire. Our experience has allowed us to simplify the process of design, home building - construction and management, which means all the services are in one place delivering results to highest standards and on time. We only have experienced people working with us and for us and each stages are broken down into smaller stages to ensure each stage is managed, regulated and complied with government standards and most important meeting our customers standards.

House Extensions Builders Borehamwood

We are a certified, accredited and fully insured company delivering construction services across London, Hertfordshire, North London and North West London. The specific areas of our house extension building services would include in Barnet, Borehamwood, Elstree, Hadley Wood, Cockfosters, East Barnet, Bushey, Finchley, St Albans, Potters Bar, Brent, Hampstead, Westminister, Chelsea, Ealing and Enfield. We are fully complaint with government and industry standards.

We build all types of extensions to highest standards single story extensions, double story extensions, triple story extensions, side and rear extensions, kitchen extensions, front extensions, loft extensions, loft conversions, wraparound house extensions full refurbishments and much more.

Lccl Construction is a responsible house extensions builder delivering responsible construction services that our customers can rely on and to rest assure the peace of mind we warranty our work for 10 years. 

Our capabilities enable us to build anything requested by the customer. Get in touch today for your free consultation with us. For all questions give us a call on 020 8037 7332 or send us an email info@adconstructionlondon.co.uk

House Extensions Builders Barnet
House Extensions Builders North London

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