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    Installation · Buying guide

    Do You Need Planning Permission for New Windows and Bifold Doors?

    What to check for replacements, extensions, listed buildings and conservation areas.

    Kitchen extension with a dark island and large glazed doors opening onto a garden

    Homeowners frequently ask whether planning permission is required before replacing windows or installing bifold doors.

    There is no single answer that applies to every property.

    Replacement windows and doors

    Straightforward replacement windows and doors will often not require a separate planning application, provided the work falls within the relevant rules.

    However, circumstances vary.

    Extensions

    If bifold or sliding doors are being installed as part of a new extension, the planning position will normally be connected to the extension itself.

    Some extensions can be constructed under permitted development rights, while others require planning approval.

    Properties requiring additional consideration

    Extra restrictions can apply to:

    • Listed buildings
    • Properties in conservation areas
    • Flats and maisonettes
    • Properties with previous planning conditions
    • Buildings where permitted development rights have been restricted

    Check before ordering

    Planning and Building Regulations are separate matters.

    Even where planning permission isn’t required, other regulatory requirements may still apply.

    If there is uncertainty, homeowners should check their particular project with their local planning authority or planning professional before proceeding.

    Once the required opening and design have been established, Bi Folds & Windows Direct can help specify the windows and doors for the project.

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