Rules for replacing windows

The rules for replacing windows depend on where you live and what the work involves. In England, replacement windows have to meet the energy rules in the building regulations, and a fitter registered with a competent person scheme can certify the work. Scotland has its own building standards and its own procedure. Wales and Northern Ireland set their own building regulations as well. Guidance written for one nation does not always apply in another.

The two guides on the rules for replacing windows

• Replacement window regulations covers England: what counts as a replacement window under the rules, the energy limit, what a certificate is, and what changes when the next edition of the energy rules takes effect.
• Replacing windows in Scotland covers the Scottish building standards, what the Technical Handbook says about windows, and listed buildings and conservation areas.

Rules that sit beside these

Building regulations are about how the work is done. Other rules are about what it looks like, and they can matter more in an older home. Planning rules, listed building consent and conservation area controls decide whether you may change the appearance of a window at all, and they are separate from the certificate your fitter provides. The Planning Portal explains the planning side for England. If your house is listed or in a conservation area, ask your council before you order.

Safety is another rule that affects the glass. Windows low in a wall and glass in doors have to be safety glass, which BS 6262 safety glass explains. The glass section covers the other glass options for replacement windows.

What to do first with the rules for replacing windows

1. Find out which nation you are in and whether your house is listed or in a conservation area.
2. Ask any fitter how they will certify the work, and ask to see the certificate when the job is done.
3. Check the quote includes the work needed to meet the rules, then find window fitters near you.

For the cost of the job in your type of home, see replacement window prices, and when you are ready, get free quotes.