- Area
- Hertfordshire
- Postcode district
- AL5
- Nation
- England
- Guide price
- From £10,000 inc VAT
- Survey
- Free for installation enquiries
Oil and LPG boiler replacement in Harpenden: what to expect
A heat pump suits most Harpenden homes, but the details decide how efficiently it runs. Our survey looks at insulation, radiators and hot water use room by room.
Rural properties near Harpenden usually have garden space for the outdoor unit, sited away from windows and sheltered where possible. Bungalows and detached houses near Harpenden running on LPG can move to a heat pump, with the tank collected by the supplier.
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
- Detached houses and bungalows with garden space for the unit
- Owners tired of fuel deliveries and tank maintenance
What's included
- Free survey with a detailed heat loss calculation for older construction
- 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
- Oil tank draining and removal or making safe, as set out in your quote
If your home near Harpenden 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 Harpenden 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 Harpenden
Here are typical prices for replacing an oil or LPG boiler with a heat pump in Hertfordshire, installed and including VAT. Use the guide price tool for a figure based on your home, then a survey confirms it in writing.
| Home | Typical size | Installed guide price | After £9,000 grant |
|---|---|---|---|
| 1–2 bedroom flat or small terrace | 4–5 kW | £10,000–£13,150 | £1,000–£4,150 |
| 2–3 bedroom terrace or semi | 5–7 kW | £11,050–£14,200 | £2,050–£5,200 |
| 3 bedroom semi or small detached | 6–9 kW | £12,600–£16,300 | £3,600–£7,300 |
| 4 bedroom detached | 8–12 kW | £14,700–£18,900 | £5,700–£9,900 |
| 5+ bedroom or larger older house | 11–16 kW | £17,350–£23,650 | £8,350–£14,650 |
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 Harpenden and what they mean
On the shortest day Harpenden gets about 7 hours 46 minutes of daylight, with the noon sun around 15° up. The heating season runs from autumn into spring, so a heat pump that is sized correctly and set up with weather compensation does most of its work in steady, cool conditions.
The steps for replacing an oil or LPG boiler with a heat pump in Harpenden
- Tell us about your home: postcode, property type and current heating.
- We book a survey in Harpenden; 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 Harpenden: questions
Where would the outdoor unit go on a Harpenden 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 Harpenden home.
How soon can you survey a home in Harpenden?
Survey dates depend on how busy installers are in Hertfordshire. We offer the next available dates when you enquire and confirm them in writing.
How long does installation take in Harpenden?
Most installations take 2–4 days on site. Jobs with several radiator changes or new pipework take longer, and your quote for a Harpenden home states the expected time.
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.
Can a heat pump cope with an exposed rural spot?
Yes. Air source heat pumps are designed to keep working well below freezing, and they periodically defrost, giving off a little vapour, which is normal. In exposed locations the installer chooses a sheltered position where possible, raises the unit to clear snow and let defrost water drain, and sizes the system for the local winter design temperature used in the heat loss calculation.