Legislation at Chambers Design and Build


Information pertaining to Loft Extentions, Party Walls, Basements, New Builds, Extensions, Refurbishments, planning and regulation.

We hope you will find the information below of use when considering your loft development. It is by no means exhaustive and you should feel free to contact Chambers Design and Build if there are any areas that you need to have clarified.


Despite the plethora of regulation there are two main areas of legislation that cover your loft conversion:

  • Planning Permission – The laws covering all building work on the exterior of your house
  • Building Regulations – Regulations covering all building work in your house interior
Lords call for new legislation on basement extensions

A private member’s bill has been tabled to combat the ‘rapid growth of unregulated’ underground extensions

The Subterranean Development Bill, introduced in the House of Lords last week by Lord Selsdon, calls for better protection for neighbours from underground redevelopment and sets out a proposed code of practice.

In recent years there has been a large hike in the number of ‘iceberg homes’ being built - there have been 700 applications for basement excavations in the London borough of Wandsworth alone in the last three years.

Because planning permission is not needed if the extension is within the footprint of a single-family house, and is less than three metres deep, subterranean expansion is becoming increasingly tempting to homeowners - especially in London.

Building Policy & Legislation

There are a number of pieces of policy and legislation that apply to the building control regime. This section focuses on the most relevant ones although, as there may well be others relevant to your situation, you are advised to take further advice to ensure you are fully informed.

An overview of the current legislation is provided here. Further information on past legislation for Building Regulations is also available.

The Building Regulations contain definitions, procedures, and what is expected in terms of the technical performance of building work.
For example, they:

  • Define what types of building, plumbing, and heating projects amount to 'building work' and make these subject to control under the Building Regulations
  • Specify what types of buildings are exempt from control under the Building Regulations
  • Set out the notification procedures to follow when starting, carrying out, and completing building work
  • Set out the 'requirements' with which the individual aspects of building design and construction must comply in the interests of the health and safety of building users, of energy conservation, and of access to and use of buildings

Checking that the Building Regulations have been complied with is done by Building Control Bodies - either the Building Control department of the local authority or a private sector Approved Inspector. Certain types of building work close to or directly affecting the boundary or party wall of premises may also be covered by the "Party Wall Act" which places obligations on people carrying out work

Then keep rest planning portal with interactive house etc

Planning Portal With an Interactive House

For more information relating to loft conversions visit the Government Planning Portal by clicking on the links below:

Useful Links
Permitted Developments & Planning
Corporate Approved Inspector
Windows & Bi Fold Doors
Roof / Windows
Roof / Light
Structural Engineers