Replacing windows in Scotland

Replacing windows in Scotland normally does not need a building warrant, but the new windows still have to meet the Scottish building standards. The Technical Handbook for homes lists work that does not need a warrant. That list includes a door, window or rooflight when the work includes replacing the frame. The handbook also says a complete replacement is not a repair, so it has to meet the full requirements of the standards.

That position comes from the Scottish Government’s domestic Technical Handbook section on work that does not need a warrant. We read the 2022 edition. A newer edition has been published. Which handbook applies depends on the date a warrant application is made, or on the date work that needs no warrant starts. Check the current edition before you rely on this.

Replacing windows in Scotland: the whole window

A new window with a new frame is a complete replacement. The handbook treats it as new work, so it has to meet the standards, including the energy standard. Our English guide, replacement window regulations, quotes England’s figures, and those are not Scotland’s. We have not checked the Scottish figure, so we do not state one. Ask your council’s building standards team, or your fitter, which value applies to your job.

Replacing windows in Scotland: changing only the glass

Work to a door, window or rooflight that is not a complete replacement, including work to the glazing, falls under a separate building type. For work close to a repair, the handbook asks for a standard no worse than the existing one, not the standard for new work. So changing a failed glass unit in the existing frame is treated more lightly than fitting a new window.

Replacing windows in Scotland: listed buildings and conservation areas

The building standards are only part of the picture. Historic Environment Scotland says you might need consent for changes to a property. It is a criminal offence to materially alter a listed building, or to demolish a building in a conservation area, without consent. The page we read does not name window replacement, so ask your council whether your windows count. HES advises keeping and improving existing window fabric wherever possible, and warns that incompatible replacements, such as double glazed PVC units, can harm a building’s look and character. Secondary glazing is one way to improve a window without replacing it; secondary glazing noise reduction covers how it performs for sound.

Tenements and flats

In a tenement, the windows may be a shared matter between owners, and the title deeds and your neighbours may have a say. Check the deeds, and ask your property manager or factor before you order, because made-to-measure windows cannot be returned.

Certification and the fitter

FENSA says it works across England and Wales, and the pages we read do not mention Scotland. Ask any fitter how they will show that the work meets the Scottish standards, and what paperwork you will receive. The mygov.scot guidance says that if you are not sure whether you need a warrant, you should check with your local council’s building standards department.

Next steps

Contact your council’s building standards team with a short description of the job, then find window fitters in Scotland and get free quotes. The rules for replacing windows section covers the other nations.