Can Your Home Have a Heat Pump?
Most UK homes are suitable for an air source heat pump. The question is rarely whether installation is possible, but how straightforward it will be. The five key factors are: outdoor space for the unit, a fossil fuel heating system to replace, reasonable insulation, adequate radiators, and a valid Energy Performance Certificate. If your home meets most of these conditions, you may qualify for the £7,500 BUS Grant (subject to eligibility criteria set by Ofgem).
This guide walks you through each check so you know where you stand before booking a survey.
Related reading: How much does a heat pump cost in 2026? | BUS Grant 2026: how to get £7,500 for your heat pump
Check 1: Do You Have Outdoor Space for the Unit?
An air source heat pump is a box roughly the size of a large suitcase that sits outside your home. It needs:
- A footprint of about 1m x 1m (slightly more for larger units)
- At least 300mm clearance from walls on three sides for airflow
- Placement at least 1 metre from your neighbour’s boundary (to comply with permitted development rules)
- A solid base — concrete pad, paving slabs, or wall-mounted bracket
Where can it go?
| Location | Suitable? | Notes |
|---|---|---|
| Back garden (ground level) | Yes | Most common position |
| Side return / alley | Yes | If wide enough (>1m) |
| Front garden | Maybe | Planning permission may be needed |
| Flat roof | Maybe | Structural check needed |
| Wall-mounted (bracket) | Yes | Saves ground space |
| Balcony (flat) | Rarely | Weight, noise, and access issues |
| Inside a building | No | Heat pumps need outdoor air |
Most houses with a garden — even a small one — have enough space. Terraced houses often use the side return or back wall. Detached and semi-detached homes typically have plenty of options.
What about flats?
Ground-floor flats with their own outdoor space can sometimes have a heat pump. Upper-floor flats are generally not suitable due to noise considerations and lack of external space. Some blocks are now installing communal heat pump systems.
Check 2: What Heating System Do You Currently Have?
To qualify for the £7,500 BUS Grant (subject to eligibility criteria set by Ofgem), your heat pump must replace a fossil fuel heating system. This includes:
| Current System | Eligible for BUS Grant? |
|---|---|
| Gas boiler (mains gas) | Yes |
| Oil boiler | Yes |
| LPG boiler | Yes |
| Electric storage heaters | Yes |
| Coal/solid fuel | Yes |
| Existing heat pump | No (already renewable) |
| District heating | No |
If you currently have a gas, oil, or LPG boiler, you may be eligible. This covers roughly 85% of UK homes.
Do I need to keep my gas connection?
No. Disconnecting your gas supply saves you the gas standing charge (approximately £117 per year at 2026 Ofgem rates). Your heat pump handles all your heating and hot water.
Check 3: How Well Insulated Is Your Home?
Heat pumps work in every home, but they work best in homes with reasonable insulation. This is because heat pumps are most efficient at lower flow temperatures (35–45 degrees C rather than 60–70 degrees C for a gas boiler). In a well-insulated home, lower temperatures are sufficient to keep every room comfortable.
Quick insulation check
| Insulation Type | Good | Needs Improvement |
|---|---|---|
| Loft insulation | 200mm+ of mineral wool | Less than 100mm or none |
| Wall insulation | Cavity walls (filled) or solid walls with insulation | Unfilled cavity or solid brick with no insulation |
| Windows | Double glazing (post-2000) | Single glazing |
| Draught-proofing | Doors and windows sealed | Noticeable draughts |
A heat pump can work in a poorly insulated home, but it may need larger radiators or a higher-output unit to compensate. A proper survey identifies any insulation gaps and factors them into the system design.
What about Victorian and Edwardian homes?
Many homes in Richmond, Kingston, and Twickenham are Victorian or Edwardian terraces with solid walls. These can absolutely have heat pumps. You may need slightly larger radiators in some rooms, a higher-capacity heat pump (10–12 kW instead of 8 kW), or possibly internal wall insulation. Our surveyor assesses all of this during a free home visit.
Check 4: What Are Your Radiators Like?
Heat pumps work with standard radiators. You do not need to replace your entire heating system. However, because heat pumps operate at lower flow temperatures, some radiators may need upgrading.
The simple test
Put your hand on your radiators when your existing boiler is running. Are they warm throughout? If your boiler currently runs at a low flow temperature (55–60 degrees C) and your rooms are warm, your radiators are probably fine for a heat pump.
When radiators need upgrading
| Situation | Action Needed |
|---|---|
| Small radiators in large rooms | May need larger radiators |
| Old, narrow column radiators | Consider upgrading to modern doubles |
| Bathroom towel rails | Usually fine (small heat demand) |
| Underfloor heating | Perfect for heat pumps (already low-temp) |
| Mix of radiators and UFH | Ideal — UFH downstairs, radiators upstairs |
The cost of upgrading radiators is typically £200–600 for 2–4 rooms and is included in your Electromatic quote. Many homes do not need any upgrades at all.
Related reading: Heat pump radiators: do you need to upgrade?
Check 5: Check Your EPC
Your property needs a valid Energy Performance Certificate (EPC) to qualify for the BUS Grant (subject to eligibility). You can check your EPC for free at epcregister.com.
| EPC Detail | What to Check |
|---|---|
| Valid? | Must be less than 10 years old |
| Rating? | Any rating qualifies for BUS (even G) — subject to eligibility |
| Recommendations? | If EPC recommends loft or cavity wall insulation, you may need to do this first |
What if my EPC has expired?
You will need a new one before applying for the BUS Grant. A domestic EPC costs £60–100 and takes about an hour. We can recommend local assessors.
What if my EPC recommends insulation?
If your EPC specifically recommends loft insulation or cavity wall insulation, Ofgem may require you to install these before your BUS Grant voucher can be redeemed. This ensures the heat pump works efficiently. We help you navigate this during the survey process.
The Results: Is Your Home Suitable?
| Check | Yes | Maybe | No |
|---|---|---|---|
| Outdoor space for unit? | You have a garden, side return, or suitable wall | Limited space but possible with bracket | No external space at all |
| Replacing fossil fuel? | Gas, oil, or LPG boiler | Electric heating (eligible but different) | Already have a heat pump |
| Reasonable insulation? | Cavity walls, double glazing, loft insulation | Some gaps but addressable | Single glazing, no insulation (fix first) |
| Radiators adequate? | Modern radiators, warm rooms | Some rooms may need upgrade | No radiators (storage heater only — needs new system) |
| Valid EPC? | Yes, less than 10 years old | Expired (just need a new one) | Never had one (get one done) |
If you scored mostly “Yes” and “Maybe”: your home is very likely suitable for a heat pump. The “Maybe” items are things we address during the survey and factor into your quote.
If you scored any “No”: there may be some preparation needed, but very few homes are truly unsuitable. Get in touch and we will give you honest advice.
Property Types We Have Experience With
| Property | Suitable? | Notes |
|---|---|---|
| 1930s semi-detached | Excellent | Cavity walls, good garden space |
| Victorian terrace | Good | Side return or back wall mount, may need radiator upgrades |
| Edwardian detached | Excellent | Lots of space, often good insulation potential |
| 1960s–80s detached | Excellent | Cavity walls, large gardens |
| Modern new-build | Excellent | Already well insulated, may have underfloor heating |
| Bungalow | Good | Ground source also an option, large roof for solar |
| Flat (ground floor, own garden) | Possible | Space and freeholder permission needed |
| Flat (upper floor) | Usually not | Consider communal system |
How Electromatic Can Help
Electromatic M&E Ltd offers free home surveys across London and Surrey (TW, KT, SW postcodes). We handle BUS Grant applications (subject to eligibility), install ASHP and solar PV from a single contractor, and deliver within 2–4 weeks of survey confirmation. All work is carried out under MCS certification via our accredited umbrella partner. Our surveyor will assess your property, check insulation and radiators, and give you an honest recommendation — with no obligation.
Call us: 07718 059 284 | Email: admin@electromatic.uk
Frequently Asked Questions
Can a terraced house have a heat pump?
Yes. Many terraced houses in London and Surrey have air source heat pumps. The unit typically goes in the back garden or on a side wall bracket. Noise and boundary distance rules (1 metre from neighbour’s boundary) must be met, but most terraces have enough space to comply. A home survey will confirm the best position.
Can I have a heat pump with single glazing?
Technically yes, but your heat pump will work harder and cost more to run. Upgrading to double glazing before or alongside the installation reduces heat demand, which means a smaller and cheaper heat pump may be sufficient. It also improves your EPC rating.
Do I need planning permission for a heat pump?
Most air source heat pumps fall under permitted development rights, meaning no planning permission is needed. Exceptions include listed buildings, conservation areas, and installations on a wall facing a highway. Read our full guide: do I need planning permission for a heat pump?
How long does a home survey take?
A free home survey with Electromatic takes approximately 60–90 minutes. Our surveyor measures every room, checks your insulation, assesses your radiators, identifies the best heat pump location, and discusses the project with you. You will receive a personalised quote within 48 hours.
What EPC rating do I need for the BUS Grant?
There is no minimum EPC rating. You simply need a valid EPC (less than 10 years old) on record for your property. Whether your home is rated A or G, you may qualify for the £7,500 BUS Grant — subject to meeting all other eligibility criteria set by Ofgem.
The information in this article is for general guidance only and does not constitute financial, legal, or technical advice. Energy savings estimates are based on typical UK household data from the Energy Saving Trust and Ofgem (April 2026 price cap). Actual savings depend on your property type, insulation levels, energy usage patterns, and electricity tariff. The Boiler Upgrade Scheme (BUS) grant of £7,500 is subject to eligibility criteria set by Ofgem — not all properties qualify. Electromatic M&E Ltd operates under MCS certification via an accredited umbrella partner. All installations comply with Building Regulations Part L and MCS standards. E&OE.
Written by Electromatic M&E Ltd — ASHP & Solar installer, London & Surrey (electromatic.uk)
Last updated: April 2026 | Electromatic M&E Ltd, Company No. 13837345
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