Oil boiler replacement in Highlands
The Highlands have the highest concentration of off-gas properties in Scotland. From Inverness to the remote glens, oil and LPG are the default heating fuels. Here is what is different about a heat pump conversion in the Highlands.
Key facts
- The Highlands have the highest proportion of off-gas homes in Scotland.
- Winter temperatures are among the lowest in the UK, making correct system sizing critical.
- Remote properties may face longer lead times for delivery and scaffolding.
- Many Highland properties are detached croft houses with good outdoor space for the unit.
- Island properties need particular attention to delivery logistics and electrical supply.
Last updated: 28 October 2026
What types of housing are in Highlands?
The Highlands have a diverse housing stock. Inverness has modern developments alongside older granite and harled properties. Rural areas have traditional croft houses, often single-storey with thick stone walls, plus newer build detached homes. Many rural properties are isolated, accessed by single-track roads, which affects delivery logistics for equipment and scaffolding.
How many properties are off-gas in Highlands?
The vast majority of the Highlands is off the gas grid. Inverness has some gas coverage, but towns like Aviemore, Wick, Thurso, Fort William, Ullapool and the islands rely almost entirely on oil, LPG and electric heating. This makes the Highlands the area where oil boiler replacement is most relevant in all of Scotland.
What insulation does a Highlands property need for a heat pump?
Traditional croft houses with solid stone walls need insulation before a heat pump is considered. Many have had loft insulation added under previous schemes, but walls and floors are often untreated. Modern build properties in Inverness and surrounding towns typically have cavity walls and adequate insulation. The surveyor will check the current state and advise what is needed.
Will my radiators need replacing in Highlands?
Highland properties with solid walls and high heat loss will almost certainly need radiator upgrades in some rooms. The colder climate means the heat pump works harder for longer, so correctly sized emitters are essential for comfort and efficiency. Underfloor heating is popular in new builds but less common in retrofits due to the disruption to existing floors.
How does the Highlands winter affect a heat pump?
Highland winters are the coldest in the UK outside mountain summits. Temperatures in the glens regularly reach -10°C or lower. A heat pump must be sized for these conditions, not for mild central-belt winters. The heat loss calculation must use local design temperatures — a generic Scottish average would undersize the system and leave the property cold in January.
Which nearby areas do we also cover?
We cover properties across the Highlands, from Inverness to Skye, and into Argyll to the south and Aberdeenshire to the east. Remote locations may have longer lead times, but we will tell you that honestly when you enquire.
Get a quotation for your Highlands property
Fill in the form with your postcode and property details. A surveyor calls you within one working day to arrange a visit.
Related guides
Costs & prices
What an oil to heat pump conversion costs and the six factors that drive the price.
Read moreHow it works
The five stages of replacing an oil boiler with a heat pump, from enquiry to handover.
Read moreAll areas covered
See all the Scottish regions we cover for oil to heat pump conversions.
Read moreLast updated: 28 October 2026. Reviewed by the Scottish Energy Efficiency team.