- Area
- West Sussex
- Postcode district
- RH12
- Nation
- England
- Guide price
- From £9,900 inc VAT
- Survey
- Free for installation enquiries
What to know about replacing an oil or LPG boiler with a heat pump in Horsham
Every property in Horsham 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.
Bungalows and detached houses near Horsham running on LPG can move to a heat pump, with the tank collected by the supplier. Owners across West Sussex can have oil tank removal arranged alongside a heat pump installation in Horsham.
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.
- Detached houses and bungalows with garden space for the unit
- Older oil boilers nearing the end of their life
- Owners tired of fuel deliveries and tank maintenance
What's included
- MCS certificate and grant application in England and Wales where eligible
- Removal of the oil or LPG boiler and flue
- Network operator notification and electrical connection
- Free survey with a detailed heat loss calculation for older construction
- Oil tank draining and removal or making safe, as set out in your quote
If your home near Horsham is off the mains gas grid, a heat pump removes the need for oil or LPG deliveries.
Grants and rules for heat pumps in England
In England the Boiler Upgrade Scheme gives £7,500 towards an air source heat pump (£9,000 if it replaces oil or LPG, from 21 July 2026 to 31 March 2027), and since 28 April 2026 a valid EPC is no longer needed. The grant is applied for by the MCS-certified installer and shown as a deduction on your Horsham quote.
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 Horsham
The ranges below are typical installed prices for homes in West Sussex, including VAT. A survey sets the exact figure, because two similar-looking houses in Horsham can need quite different radiators and pipework.
| Home | Typical size | Installed guide price | After £9,000 grant |
|---|---|---|---|
| 1–2 bedroom flat or small terrace | 4–5 kW | £9,900–£13,000 | £900–£4,000 |
| 2–3 bedroom terrace or semi | 5–7 kW | £10,900–£14,050 | £1,900–£5,050 |
| 3 bedroom semi or small detached | 6–9 kW | £12,500–£16,100 | £3,500–£7,100 |
| 4 bedroom detached | 8–12 kW | £14,550–£18,700 | £5,550–£9,700 |
| 5+ bedroom or larger older house | 11–16 kW | £17,150–£23,400 | £8,150–£14,400 |
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 Horsham's winters
On the shortest day Horsham gets about 7 hours 54 minutes of daylight, and the winter sun reaches only around 15° above the horizon at noon. Winters this far south are milder than in most of the UK, which helps a heat pump run at low flow temperatures for much of the season.
From survey to switch-on in Horsham
- Send your postcode and a few details, or use the guide price tool.
- A surveyor visits your Horsham home, measures every room and checks where the outdoor unit can go.
- You receive a heat loss design and a fixed written quote, with any grant shown where it applies.
- Installers fit the unit, cylinder and any radiator changes, typically over 2–4 days on site.
- The system is commissioned, set up with weather compensation and handed over with the paperwork.
Replacing an oil or LPG boiler with a heat pump in Horsham: questions
Do you cover Crawley as well as Horsham?
Yes. We arrange surveys and installation in Crawley, which is about 7 miles north-east of Horsham, and across West Sussex.
How long does a heat pump survey take in Horsham?
A home survey in Horsham 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.
How soon can you survey a home in Horsham?
Survey dates depend on how busy installers are in West Sussex. We offer the next available dates when you enquire and confirm them in writing.
What happens with a leased LPG tank?
Leased LPG tanks belong to the supplier, so the supplier arranges collection. Check your contract for notice periods and any charges before you fix a date. We time the switchover so you are not left without heating, and once the heat pump is commissioned the supplier can empty and remove the tank. Bottled LPG cylinders are simply returned.
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.