Air conditioning in a Victorian terrace

Solid brick walls, no side access and a narrow rear yard are the usual constraints, and many of these homes also sit inside a conservation area. None of that rules out air conditioning. Each constraint just shapes what is possible and where the outdoor unit can go. For the wider context on where a split fits into a UK home, see the cooling pillar; this piece is about the Victorian-terrace specifics.

Upstairs rooms are usually the priority, especially a loft conversion under a south-facing roof. Front rooms take the heaviest afternoon gain. Rear rooms hold warmth for longer into the evening because the brickwork stays warm.

There are three realistic places for the outdoor unit in a typical Victorian terrace: on the rear wall of the house, on the flat roof of a rear extension, or at ground level in the back yard. Each has trade-offs that an installer should walk you through on site rather than over email.

• Rear wall: hidden from the street, but noise carries to neighbours, so check the distance to nearby bedroom windows.
• Flat roof on a rear extension: usually the best option for sound, but it needs a structural check and a route for the condensate to drain.
• Ground level in the yard: the easiest install, but it eats outdoor space and sits closest to the boundary with the neighbour.

A rear-mounted unit on a non-listed terrace outside a conservation area is usually permitted development. The rules are tighter than people expect, though, with limits on unit size, distance to the boundary and noise at the nearest window.

If your home is listed or sits in a conservation area, plan for a full planning application. Pre-application advice from the local authority is almost always worth the small fee, because it turns a yes-or-no risk into a clear brief for the installer.

The refrigerant pipework runs from the indoor unit to the outdoor unit, normally through an external wall. In solid brick this means small core-drilled holes that are sealed and trimmed neatly on both faces. Installers used to modern cavity walls sometimes underestimate this work, so ask to see photos of their previous jobs in Victorian homes before you sign.