- Area
- Bristol
- Postcode district
- BS9
- Nation
- England
- Guide price
- From £9,700 inc VAT
- Survey
- Free for installation enquiries
Gas boiler to heat pump in Westbury-on-Trym: what to expect
Homes around Westbury-on-Trym range from older terraces to newer estates, and each needs a different design. That is why we survey before we quote.
Installers in Westbury-on-Trym take out the old boiler and flue and seal the wall opening as part of the job. Semi-detached and terraced houses in Westbury-on-Trym often have an airing cupboard that can be reused for a heat pump cylinder.
Moving from mains gas to a heat pump means finding cylinder space, deciding what happens to the gas supply and comparing running costs on realistic assumptions.
- Homes in England and Wales eligible for the Boiler Upgrade Scheme
- Households ready to give up gas entirely and drop the standing charge
- System or regular boiler homes with an existing airing cupboard
What's included
- Commissioning, MCS certificate and grant application in England and Wales where eligible
- Capping of the gas pipe at the boiler position where you are giving up gas
- Heat pump cylinder, outdoor unit and weather compensation controls
- Free survey with heat loss calculation and cylinder siting
- System flush and radiator upgrades where the design calls for them
If your Westbury-on-Trym home still cooks on gas, we talk through whether to keep the supply or switch to an induction hob.
Grants and rules for heat pumps in England
Homes in Westbury-on-Trym 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 a gas boiler with a heat pump in Westbury-on-Trym
Here are typical prices for replacing a gas boiler with a heat pump in Bristol, 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 £7,500 grant |
|---|---|---|---|
| 1–2 bedroom flat or small terrace | 4–5 kW | £9,700–£12,750 | £2,200–£5,250 |
| 2–3 bedroom terrace or semi | 5–7 kW | £10,700–£13,750 | £3,200–£6,250 |
| 3 bedroom semi or small detached | 6–9 kW | £12,250–£15,800 | £4,750–£8,300 |
| 4 bedroom detached | 8–12 kW | £14,300–£18,350 | £6,800–£10,850 |
| 5+ bedroom or larger older house | 11–16 kW | £16,850–£22,950 | £9,350–£15,450 |
Installed, inc VAT: unit, cylinder, controls, minor pipework and commissioning.
Winter daylight and heating in Westbury-on-Trym
Westbury-on-Trym sees roughly 7 hours 50 minutes of daylight in late December against 16 hours 38 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 a gas boiler with a heat pump in Westbury-on-Trym
- Send your postcode and a few details, or use the guide price tool.
- A surveyor visits your Westbury-on-Trym 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 a gas boiler with a heat pump in Westbury-on-Trym: questions
How long does a heat pump survey take in Westbury-on-Trym?
A home survey in Westbury-on-Trym 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 Westbury-on-Trym?
Survey dates depend on how busy installers are in Bristol. We offer the next available dates when you enquire and confirm them in writing.
Do I need new radiators for a heat pump in Westbury-on-Trym?
Often some, not all. Heat pumps run best at lower water temperatures, so rooms with small radiators may need larger ones. The survey of your Westbury-on-Trym home gives a room-by-room list.
Do I need to replace the cylinder I already have?
Usually, yes. Older cylinders have a small internal coil designed for water from a boiler at around 60–70°C, and they cannot take in heat quickly enough at the lower temperatures a heat pump runs at. A heat pump cylinder has a larger coil. On its own, a cylinder supplied and fitted has a guide price of £1,200–£2,200, installed and including VAT, though it is normally part of the full system price.
Can a heat pump replace a combi boiler?
Yes, but you need room for a hot water cylinder, because heat pumps store hot water rather than heating it on demand. Most homes find a space in a cupboard, utility room, garage or under the stairs, and compact or combined indoor units help where space is tight. The survey measures the options first, so you know where everything will go before you accept the quote.