Replace windows

Replace windows

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If I want to replace one or more windows in my home, or any other type of building, will the building regulations apply?

YES - if you are replacing the whole of the fixed frame and opening parts.

Since 1 April 2002 building regulations have applied to all replacement glazing. The regulations apply to thermal performance and other areas such as safety, air supply, means of escape and ventilation.

An external window or door is a "controlled fitting" under the Building Regulations and as a result of this classification these Regulations set out certain standards to be met when such a window or door is replaced.

You could use an installer registered with a competent person scheme (BSI, CERTASS or FENSA). A registered installer will be approved to carry out the work to comply with building regulations without involving local authority building control.

When work is complete you will receive a certificate showing the work was done by a registered installer. More information about Competent Person Schemes can be found here.

Alternatively, you could use an unregistered installer or DIY, in which case approval can be sought from the relevant Building Control Body.

NO - if the work amounts to no more than, for example, replacing broken glass, replacing fogged double-glazing units, replacing some rotten sashes (i.e. opening parts) in the main window frame, or replacing some rotten sections of the main frame members. 

If your building is listed nationally, or locally in some way, for its architectural or historic interest and/or is located in a sensitive urban or rural environment (e.g. a Conservation Area or an Area of Outstanding Natural Beauty), you should note that English Heritage have produced an Interim Guidance Note on the application of Part L ('Conservation of fuel and power') of the building regulations. The note offers advice on how to balance the needs for energy conservation with those of building conservation. 

Please note that you may require planning permission and you are advised to contact the Planning Duty Officer on 0208 753 3440 or email dutyplanner@lbhf.gov.uk for planning advice before commencing any building work.