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Building Regulations Notes for Plans - A Step Beyond Guidance

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.

England/Wales: Flat Conversion Notes
England/Wales: Flat Conversion 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.

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    These building notes apply to Flat Conversions. Please read the Flat Conversion Info page.

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


    To begin compiling your Flat Conversion Specification, go through the sections on the left, starting from the top, and add notes from the relevant subsections as you proceed.

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