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Works Commencement & Completion Notices: Specifications & Guidance
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Commencement / Completion Notices: Specs and Templates
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Flat Conversions

Flat Conversion Information

Flat Conversions 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.

Fire Regulations of flats can be complicated and consultations with your local Fire Authority and Building Control are essential to plan a satisfactory means of escape.

The guidance given here is for flats with:

  • a) the top floor no more than 11m above the ground
  • b) no more than 3 storeys above ground level
  • c) no more than 2 dwellings per storey

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

  • SAP Calculations
  • Structural Calculations
  • Water Calculations.
  • Sound testing.
  • Fire Brigade Consultation.
  • Other factors. Please note that this is not a complete list.

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

Please see the "Flat Conversion Info" page for more information.

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.

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    Flat Conversion Notes

      Terms and Conditions

      House Extension Specifications are partially available for evaluation. To use fully functional Apps, Register for a Standard/Premium account.

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

      Important Note:- For Commercial Licence to use the Specifications & access House Extension, New Build, Loft / Garage / Basement / Flat Conversions, New Build Flats & Garage Build Specs, see Registration.

      Please Login to use House Extension, New Build, Loft and Garage Conversion (etc) Specifications. Login requires Registration.

      Your use of the site indicates acceptance of the Terms and Conditions.
      Choose a Category
      to Begin

      These building notes apply only to Flat Conversions.

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

      Guidance

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

      Important: When compiling a spec, Save it at Regular Intervals (e.g. 15 minutes) to safeguard your Flat Conversion Specification.

      See under the Support Menu for Tutorials and Videos on Using the Website.


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    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
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    Specifications
    for Wales
    Nov 2022
    changes
    Specifications
    for England
    June 2022
    changes