Greater London · Heat pump installation
Heat pump installation in Grange Mills, Greater London
Air source heat pumps in and around Grange Mills, from the first look to the final check and a fixed price agreed before work begins.
- Choosing between air-to-water and air-to-air
- Deciding on the outdoor unit position
- Wanting to stop using oil, LPG or gas for heating
Air source heat pumps in Grange Mills, done properly
An air-to-water heat pump costs £8,000–£16,000 (0% VAT on homes), before the grant. The Boiler Upgrade Scheme can provide £7,500 towards an eligible air-to-water system in England and Wales and the installer makes the application. Not every home qualifies, so we check eligibility before you commit. If you are dealing with checking emitters for a heat pump and checking whether planning permission is needed, we can sort it out.
A terrace in Grange Mills shares walls with its neighbours, which helps keep heat in, provided the outdoor unit can sit somewhere that passes the MCS noise check.
Any work on the refrigerant circuit is recorded: what was done, the refrigerant type and any amount added or recovered. Keep the records with the manual and the warranty documents, ready for the next service or a warranty query.
- Location
- Grange Mills (SW12, SW4, SW2)
- Wider area
- Greater London
- Quote
- A fixed-price quote up front
- Replies
- On the working day you ask
- Credentials
- F-Gas certified, NICEIC approved, MCS
- Costs
- £8,000–£16,000 (0% VAT on homes), before the grant
- Telephone
- 07833 053749
- Last updated
- 30 October 2026
Aftercare tips
Think of this as the after-treatment advice, short and simple:
- Keep up with insulation and draught-proofing
- Leave indoor units unobstructed
- Clear leaves and debris from the outdoor unit
Now and then in cold weather, the outdoor unit defrosts itself. It may give off steam or sound different for a few minutes and it’s part of how the system works.
Keep the outdoor unit clear of leaves, plants and stored items. Airflow is what it runs on so keep it unobstructed.
Different systems, different jobs
Outdoor unit position and planning
Permitted development conditions in England include an outdoor unit of no more than 1.5 m³ and must meet MCS 020(a) and not be used solely for cooling. Listed building curtilages are excluded.
Heat loss surveys
The survey covers the building fabric and how air moves through it, and the size of each room.
Fixed-price quotes for air source heat pumps in Grange Mills
We quote each job individually. This is what makes a difference:
- A single visit or a regular plan
- Whether it’s a simple split or a larger system
- The electrical supply and whether a new circuit is needed
Leaving a fault or an overdue service rarely makes the work cheaper. Faults and wear in a system tend to grow, and a struggling system uses more electricity to do less. If you’re not sure what’s needed, ring 07833 053749 or write to us at info@aircondoctor.co.uk for straight advice and a fixed price.
Asking for a quote
Simple jobs can often be priced from pictures and some basics. Useful things to send:
- The rating plate or label on any existing unit
- Any error code or flashing light on the display
- The outdoor side of the property, including any roof or flat area
To help us quote: the address and the type of property, a few pictures, the brand and model of anything already fitted and any symptoms, from error codes to drips. Once you have those, phone 07833 053749 or use the quote form.
The process
Everything the job needs comes with us, from tools and test equipment to ladders and dust sheets. All we ask is clear access to the units, or to where they’ll go, and to the consumer unit. On site, the work takes from a couple of days to around a week, depending on the system and how much of the heating changes. In a London area like Grange Mills, parking and access are worth sorting out before the day.
- It begins with your house and the heating it relies on now.
- Every room’s heat loss is worked out on site.
- The design covers the heat pump, emitters, hot water and outdoor unit.
- Cost, grant and VAT appear on one fixed-price quote.
- We install, commission and register the system under MCS.
Getting ready for the visit
- Plan for pets to be kept clear during the visit
- Make sure we can reach the outdoor unit, or where it will go
- Mention any parking restrictions near the property
Getting a price
Photos are the fastest route to a quote: the inside and outside of the property where the work is, plus the rating plate of any unit already there. Add the address and what you’d like done, and many jobs can be priced from that.
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Nearby places to Grange Mills
Other services in Grange Mills
Heat pumps in Grange Mills: local notes
About 55% of homes across Grange Mills and its surrounding area were built before 1919, according to the Valuation Office Agency’s council tax figures, and the last census (2021) found about 71% of households live in flats. Period properties can still suit a heat pump, but the design has to start from accurate heat loss figures. A flat may have no room for a hot water cylinder, and the freeholder typically has a say on the outdoor unit, which can tip the choice towards air-to-air. London homes can be short of space for an outdoor unit and cylinder, which affects the choice of heat pump.
Kingswood House, roughly 2.9 miles east, is a reminder to check your home’s listing status: permitted development doesn’t cover listed buildings. If your home is near Balham station and heated by a gas boiler, an air-to-water heat pump can replace it where the survey shows it suits.
Grange Mills is about 2 miles south-west of Stockwell, in Greater London. Wherever you are in the SW12 postcode area, we cover air source heat pumps. Our area takes in 764 places across Greater London, from busy centres to quieter spots.
Not far from Grange Mills, a recent job of ours was on Streatham High Road, Streatham (SW16), about 1 mile south-east: installing two LG wall-mounted units in the main nail bar area and a third unit in the treatment room.
Lynn Road, Weir Road and Byrne Road and the roads off them are all inside our area. Our working area takes in SW12, SW4 and SW2 in full. Close to Grange Mills, our area also takes in Hyde farm estate (1 mile south-east), Balham (1 mile south-west), Clapham Park (1 mile north-east), Streatham Hill (1 mile east) and Streatham Park (1 mile south). Within a short drive, we also cover London (4 miles north-east), City of Westminster (5 miles north), Marylebone (5 miles north) and Kensington (5 miles north-west).
Local landmarks in Grange Mills
Typical jobs here are in properties near The Bedford pub, Waldorf School of South West London and La Retraite Roman Catholic Girls' School and the streets around them. There’s a railway station in Grange Mills itself: Balham station. A little further out are London Sewing Machine Museum (0.9 miles south-west) and St James' Hospital (0.9 miles west). Not far away are Knight's Hill and Battersea Park Lake.
Questions from Grange Mills
Can I get the Boiler Upgrade Scheme grant in Grange Mills?
Grange Mills is covered, as the scheme runs across England and Wales. Air-to-water and ground source systems attract £7,500. Air-to-air gets £2,500, but only where it takes over from fossil-fuel heating and covers the whole home’s heating demand. You don’t apply yourself: the MCS certified installer does, which is us.
Is a heat pump in Grange Mills permitted development?
The answer turns on the property and where the outdoor unit would sit. The La Retraite Conservation Area is close to the centre of Grange Mills. The permitted development rules for heat pumps leave out listed buildings and stop outdoor units going on road-facing walls or roofs in conservation areas. Anything outside the rules needs an application, and we raise it with the planning department at Wandsworth council, typically the authority for Grange Mills first.
Is the equipment covered by a warranty?
Warranty comes from the manufacturer and depends on the brand and product. For instance, Daikin’s standard warranty on split air conditioning is 2 years and we explain the terms for your brand on the quote.
Do I get paperwork after the visit?
Yes. You get a written record of each visit, and any work on the refrigerant circuit goes in the F-Gas records. Keep them with the manual and the warranty documents.
Will you work on another installer’s system?
Yes. We work on systems fitted by other installers as well as our own from all the leading brands. Tell us the make and model and send any paperwork you have.
Can you set up regular servicing?
Yes. We offer maintenance contracts, set at the interval the system and the manufacturer’s terms need. Each visit is recorded and F-Gas records kept where they apply.
Do I need new radiators for a heat pump?
It depends on each radiator and the room it heats. At the lower temperatures a heat pump uses, radiators need more surface, and the survey checks each one.
A customer’s words
“Office air con broke down in the July heatwave. Called at 8am, engineer was here by noon and fixed within 2 hours. Brilliant emergency response. They now hold the service contract for the whole building.”
James T., Crawley, office manager