- Area
- Kent
- Postcode district
- TN14
- Nation
- England
- Guide price
- From £9,800 inc VAT
- Survey
- Free for installation enquiries
Oil and LPG boiler replacement in Westerham: what to expect
Most homes can run on a heat pump if the system is designed properly, and Westerham is no different. The key is matching the heat pump and radiators to the home's heat loss.
Owners across Kent can have oil tank removal arranged alongside a heat pump installation in Westerham. Cottages and farmhouses in and around Westerham often have solid walls, so the survey looks closely at construction and draughts.
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.
- Rural and village homes off the mains gas grid
- Older oil boilers nearing the end of their life
- Detached houses and bungalows with garden space for the unit
What's included
- Network operator notification and electrical connection
- Removal of the oil or LPG boiler and flue
- Help arranging LPG tank collection with your supplier
- Outdoor unit, heat pump cylinder, controls and radiator changes
- MCS certificate and grant application in England and Wales where eligible
Bungalows and detached houses near Westerham running on LPG can move to a heat pump, with the tank collected by the supplier.
Grants and rules for heat pumps in England
Homes in Westerham can use the Boiler Upgrade Scheme, which takes £7,500 off the cost of an air source heat pump when it replaces fossil-fuel or electric heating. Replacing oil or LPG heating qualifies for £9,000 for installations from 21 July 2026 to 31 March 2027, and air-to-air systems for £2,500. The MCS-certified installer named in your quote applies for the grant and deducts it from the price.
Installing heat pumps is zero-rated for VAT across the UK until 31 March 2027. Since 29 May 2025, permitted development in England allows up to two air source heat pumps on a house, each up to 1.5 m³, with no blanket 1 m boundary rule — the installation must still meet the MCS planning standards, including the noise check. Listed buildings, flats and some conservation-area positions need extra consent, which we check at survey.
Guide prices for replacing an oil or LPG boiler with a heat pump in Westerham
Guide prices for Westerham and the rest of Kent 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 | £9,800–£12,900 | £800–£3,900 |
| 2–3 bedroom terrace or semi | 5–7 kW | £10,800–£13,900 | £1,800–£4,900 |
| 3 bedroom semi or small detached | 6–9 kW | £12,350–£15,950 | £3,350–£6,950 |
| 4 bedroom detached | 8–12 kW | £14,400–£18,550 | £5,400–£9,550 |
| 5+ bedroom or larger older house | 11–16 kW | £17,000–£23,200 | £8,000–£14,200 |
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.
Designing for Westerham's winters
Westerham sees roughly 7 hours 52 minutes of daylight in late December against 16 hours 36 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.
From survey to switch-on in Westerham
- Tell us about your home: postcode, property type and current heating.
- We book a survey in Westerham; 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 Westerham: questions
Do you cover Sevenoaks as well as Westerham?
Yes. We arrange surveys and installation in Sevenoaks, which is about 5 miles east of Westerham, and across Kent.
Where would the outdoor unit go on a Westerham house?
Usually at the side or rear, on a level base with space around it for airflow and servicing, away from bedroom windows where possible. The surveyor checks positions at your Westerham home.
Can you service a heat pump in Westerham that someone else installed?
Yes. We arrange servicing and repairs for most air source heat pumps in Westerham, whoever fitted them. Tell us the make and model when you book.
Will I need bigger radiators in an older cottage or farmhouse?
Often in some rooms, because thick solid walls and older windows lose more heat, and heat pumps work at lower water temperatures than oil boilers. The survey checks each room. Rooms with high ceilings or large windows are common candidates for a larger radiator. Where swapping radiators is impractical, a high-temperature unit can be considered, with lower efficiency as the trade-off.
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.