- Area
- South Glamorgan
- Postcode district
- CF61
- Nation
- Wales
- Guide price
- From £9,500 inc VAT
- Survey
- Free for installation enquiries
Before you book: replacing an oil or LPG boiler with a heat pump in Llantwit Major
Every property in Llantwit Major is different, so the design starts from measurements rather than a rule of thumb. That keeps the system the right size and the running costs predictable.
If your home near Llantwit Major is off the mains gas grid, a heat pump removes the need for oil or LPG deliveries. Rural properties near Llantwit Major usually have garden space for the outdoor unit, sited away from windows and sheltered where possible.
Off-gas homes have a lot to plan when switching to a heat pump: the fuel tank, older walls, rural power supplies and higher heat loss.
- Eligible homes in England and Wales within the higher grant window
- Older oil boilers nearing the end of their life
- Owners tired of fuel deliveries and tank maintenance
What's included
- Network operator notification and electrical connection
- Oil tank draining and removal or making safe, as set out in your quote
- MCS certificate and grant application in England and Wales where eligible
- Removal of the oil or LPG boiler and flue
- Free survey with a detailed heat loss calculation for older construction
For homes outside Llantwit Major reached by a long drive or narrow lane, delivery of the unit and cylinder is planned in advance.
Grants and rules for heat pumps in Wales
Homes in Llantwit Major can use the Boiler Upgrade Scheme, which applies in Wales as well as England: £7,500 towards an air source heat pump, or £9,000 when it replaces oil or LPG heating for installations from 21 July 2026 to 31 March 2027. The MCS-certified installer named in your quote applies and deducts the grant.
There is no VAT on installing a heat pump anywhere in the UK, Wales included, until 31 March 2027. Planning rules for heat pumps in Wales are set by the Welsh Government and differ from England's, so the surveyor checks the unit position against them.
What to budget for replacing an oil or LPG boiler with a heat pump in Llantwit Major
Guide prices for Llantwit Major and the rest of South Glamorgan are shown below, installed and inc VAT. We publish ranges rather than a single figure because design details move the price, and the written quote after survey fixes it.
| Home | Typical size | Installed guide price | After £9,000 grant |
|---|---|---|---|
| 1–2 bedroom flat or small terrace | 4–5 kW | £9,500–£12,500 | £500–£3,500 |
| 2–3 bedroom terrace or semi | 5–7 kW | £10,500–£13,500 | £1,500–£4,500 |
| 3 bedroom semi or small detached | 6–9 kW | £12,000–£15,500 | £3,000–£6,500 |
| 4 bedroom detached | 8–12 kW | £14,000–£18,000 | £5,000–£9,000 |
| 5+ bedroom or larger older house | 11–16 kW | £16,500–£22,500 | £7,500–£13,500 |
Installed, inc VAT: unit, cylinder, controls, minor pipework and commissioning. The £9,000 Boiler Upgrade Scheme figure applies to oil and LPG replacements in England and Wales installed from 21 July 2026 to 31 March 2027.
Short winter days in Llantwit Major and what they mean
Llantwit Major sees roughly 7 hours 50 minutes of daylight in late December against 16 hours 37 minutes in June. Milder southern winters suit heat pumps well, though the system is still sized for a cold snap rather than an average day.
The steps for replacing an oil or LPG boiler with a heat pump in Llantwit Major
- Tell us about your home: postcode, property type and current heating.
- We book a survey in Llantwit Major; the surveyor measures rooms, windows and radiators and looks at cylinder space.
- The design and quote arrive in writing, including radiator changes and the outdoor unit position.
- On installation days the old system is removed and the new one fitted and filled.
- We commission the heat pump, show you the controls and register the installation.
Replacing an oil or LPG boiler with a heat pump in Llantwit Major: questions
What size heat pump does a Llantwit Major home need?
It depends on the heat loss, not the postcode. As a rough guide, a 3 bedroom semi often needs 6–9 kW, but the room-by-room survey sets the actual size for your Llantwit Major home.
How long does a heat pump survey take in Llantwit Major?
A home survey in Llantwit Major usually takes one to two hours. The surveyor measures every heated room, checks windows, walls and radiators, and looks at where the outdoor unit and cylinder can go.
Do you cover Cowbridge as well as Llantwit Major?
Yes. We arrange surveys and installation in Cowbridge, which is about 4 miles north-east of Llantwit Major, and across South Glamorgan.
Is a heat pump cheaper to run than oil?
It depends on oil prices, your home's insulation, the flow temperature and your electricity tariff, so there is no single answer. At the October to December 2026 price cap, a heat pump with a seasonal efficiency of 3.0 delivers heat for about 8.8p per kWh, and at 3.5 about 7.5p. Compare that with your oil cost per kWh of heat, allowing for your boiler's efficiency; the survey estimate gives a figure for your home.
Do I have to remove my oil tank?
Not always, but it should be emptied and made safe. A tank in good condition can be drained, cleaned and left in place, though most owners prefer to have it taken away to free up space. Old or damaged tanks are usually removed. Your quote says which option is included, and any remaining oil and sludge is disposed of properly.