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New Build Information

New Builds are a specialist area & should only be undertaken by competent, qualified & experienced professionals.

They require the services of a professional architect to approve all surveys, investigations & to oversee employment of other professional services.

The specifications only apply to dwellings up to 2 storeys although some are additionally applicable to 3 storeys.

The design & construction of the proposed works is always the responsibility of the designer, applicant & contractor.

When using our specs, checks should be made to ensure that they apply to your specific project.

Additional factors requiring attention for New Builds:

  • SAP Calculations
  • Structural Calculations
  • Water Calculations.
  • Other factors. This is not a complete list.

Please note: Use of our specs does not guarantee approval.

Please see the "New Build Info" page.

Important note regarding June 2022 England Building Regulations Updates

Which set of specs should I use?

The Amendment Regulations and accompanying Approved Documents L: Volumes 1 and 2 come into force on 15 June 2022 in England. However, the changes will not apply in relation to building work where a building notice or an initial notice has been given to, or full plans deposited with, a local authority before 15 June 2022 provided that the building work is started before 15 June 2023.

Therefore, where plans are to be deposited with a local authority before 15 June 2022 and building work starting before 15 June 2023, use the Specs with page heading 'Pre-June 2022'.

Where plans are to be submitted to Building Control on/after 15 June 2022 or building work is to start on/after 15 June 2023, use the specs with page heading 'Specs for June 2022', where available.

    England: New Build Notes

      Terms and Conditions

      House Extension Specifications are partially available for evaluation. To use the fully functional Apps, please register for a Standard or Premium account.

      Scope of Notes: The Specs are applicable to work in England & Wales only.

      Important Note:- For Commercial use of the Specifications & access to Extension, New Build, Loft, Garage Conversion & Garage Build Specs, please see registration schemes.

      Please Login to use House Extension, New Build, Loft and Garage Conversion Specifications. Login requires registration.

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      Choose a Category
      to Start

      These building notes apply only to New Builds. Please read the New Build Info page


      It is your responsibility to ensure that the notes are suitable for use in your particular situation.


      To compile a New Build specification, go through the sections on the left, starting from the top, and add notes from the relevant subsections as you proceed.

      ***Important*** Once you've started adding notes, keep this page open otherwise you may lose your New Build Specification / Note-List.

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    Your New Build Note-List
    To Text
    A Selection of Detail Drawings by Categories. This is just a Small Sample from our Drawing Library.
    Detail Drawings
    New Details
    Loft Conv'n Details
    Foundation Details
    Floor Details
    Wall Details
    Roof Details
    Internal Works
    Structure Details
    Drainage Details
    Timber Frame
    Compile your Building Regs Specifications
    Which specs to use:
    June 2022 or Pre-June 2022?
    June 2022