The Extension Experts provide expert advice and services to home owners, businesses, and other construction and property for planning applications and permissions, and building regulations. We produce professional house extension plans as well as new build drawings for developments and manage the whole process from initial consultation through to start on site.

Our services include: planning application drawings and planning consultancy, extension drawings, architectural services & CAD drafting, building regulations, and property advice for home owners and businesses.

Based in Chislehurst in South East London, The Extension Experts provide all of their architectural, planning, and surveying services across London and the South East. This includes all areas within the M25 and many areas in the home counties. If you are unsure if we cover your are you can contact us to enquire about planning, or our other services, or find out more about The Extension Experts and advice on house extension plans, planning applications, our any of our other architectural and surveying services.

Highlights, Specialties & Features

  • Weekend site consultation and surveys available for domestic clients.

Professional Associations & Certifications


Serviced Areas

  • London and South East

Payment Options

  • Cash, Credit Card, Bank Transfer

Contact Details

  City Bromley
  Postcode BR2 8AX
  Address 1 Bromley Lane
  Phone Number 020 3488 0280

Products & Services

Planning Applications and Permissions

Expert planning advice and drawings for house extensions, new builds, and developments starting from J795 for a single storey rear extension planning application. This service includes the completion of all drawings necessary to complete and submit the application to your Local Authority Planning Department as well as monitoring and managing the application through to decision.

Building Regulation Drawings

Building Regulation Drawings – Ensure your project complies with the latest Building Regulations.
We specialise in producing detailed drawings suitable for submission to Building Control to ensure your build meets current regulations and gets Building Control Certification.

CAD Drawings

For whatever purpose you require CAD drawings we can help you. From alterations to existing drawings, to the production of detailed construction issue drawings our CAD draftsmen can meet your requirements.

Our service varies depending on your requirements, and can include producing CAD drawings of your sketches, to us visiting a site and carrying out a measured survey to do the whole process for you.

Customer Testimonials

We were really happy with what they did for us, it really helped. They delivered quickly and were very friendly throughout. We did a two storey extension to our house in Biggin Hill and they visited site and delivered the drawings and planning application in two weeks. Many thanks for your hard work. We thought it would be much harder. We will definitely recommend you to our friends. Thanks again.

Social Activity

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The Complete 9 Step Beginners Guide To Extending Your Home
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My @Quora answer to How can I build a house easier?
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How to extend your house in 7 steps
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