Can you have air conditioning in a listed building?

Do you always need listed building consent?

You need it for any work that alters a listed building in a way that affects its character as a building of special interest. That applies inside as well as outside. Holes through old walls, pipe runs across plasterwork and units on visible elevations all raise the question. Some minor work may not need it, but the decision belongs to the council and not to the installer. Permitted development is no help, since it is unavailable anywhere within a listed building's grounds. Sources: Listed Buildings Act, section 7; Planning Portal.

What happens if you go ahead without consent?

Carrying out such work without consent is an offence, for the person who does it and the person who causes it to be done. The maximum penalty is two years in prison, a fine, or both, and courts can take account of any financial benefit. Planning permission does not replace it either, as the two are separate. Sources: Listed Buildings Act, section 9; Mishcon de Reya.

Will the council say yes?

It depends on the building. Historic England said in 2023 that heat pumps will generally be acceptable on listed buildings if they are sympathetically sited, while warning that installation may sometimes cause unacceptable harm. In other words, the position and the route matter more than the machine. A reversible system that replaces inefficient heating also gives you a stronger argument than cooling alone. Source: The Construction Index.

Which Leamington buildings does this affect?

A great many. Warwick District Council's conservation guide describes every building on Lansdowne Crescent as Grade II*, the parish church as Grade II* and the Royal Pump Rooms as Grade II. Terraces around the Parade, Clarendon Square and Lansdowne Circus also feature heavily in the guide. If you are not sure, search the National Heritage List for England by address, or ask the council. Remember that a listing can cover more than the part that seems important. Source: Warwick District Council.

Where can the units and pipes go on a Regency terrace?

• Outdoor unit. Start with the rear yard or a basement area out of public view. Avoid fixing to stucco or decorative ironwork where possible. A free-standing plinth does less damage than brackets.
• Pipe route. Existing chimneys, service risers, later partitions and modern extensions can all carry pipes with far less harm than chasing them through old plaster.
• Indoor unit. Keep away from cornices and panelling. Secondary rooms and later additions are easier to justify. A floor-standing unit may suit a room whose walls and ceiling should be left alone.

Can air conditioning damage an old building?

It can if it is badly planned. A 2026 review by Mishcon de Reya warns that humidity from some systems, especially those without effective dehumidification, may harm historic materials such as stone, plaster and timber. Keep the changes in temperature gentle, avoid blowing directly on sensitive finishes, and take advice from a conservation professional for significant interiors. Source: Mishcon de Reya.

What order should you do things in?

1. Confirm the listing and read the description.
2. Have a survey that identifies one or two possible positions and routes.
3. Talk to the council's conservation officer before you commit.
4. Apply for listed building consent, plus planning permission if needed.
5. If leasehold, get the freeholder's consent as well.
6. Only then book the installation.