The short honest answer: most reasonably insulated Scottish homes with outdoor space for the unit and indoor space for a cylinder are viable candidates for an air source heat pump.
Typically a good fit:
- 1960s-onwards semis and detached houses with cavity wall insulation
- Modern builds and new-builds (often already heat pump ready)
- Bungalows and single-storey properties
- Larger family homes planning to stay long-term
- Homes already running underfloor heating
Often viable with planning:
- Older sandstone properties with good insulation upgrades
- Homes switching from oil or LPG, where running cost savings are largest
- Properties combining a heat pump with solar PV
Harder to justify or not suitable:
- Very small flats with no suitable outdoor space
- Listed buildings or conservation areas with planning restrictions on external units
- Very draughty, uninsulated properties where basic fabric improvements should come first
- Properties with no room for a hot water cylinder and no existing tank
We'd rather tell you honestly at the survey that a heat pump isn't the right call for your home than sell you a system that underperforms. If your property fits, we'll design it properly. If it doesn't, we'll suggest a better route — often that's a high-efficiency gas boiler today, with a heat pump revisited after insulation upgrades.