Greater London · Heat pump installation
Carshalton air source heat pumps
Air source heat pumps in and around Carshalton, from the first look to the final check with the price fixed before work begins.
- Radiators that may be too small for a heat pump
- Questions about the Boiler Upgrade Scheme
- Wanting to stop using oil, LPG or gas for heating
How we handle air source heat pumps in Carshalton
Air-to-water heat pumps heat your hot water through a cylinder. Homes with a combi boiler may not have a cylinder, so finding space for one is part of the survey. With air-to-air, hot water has to come from something else. The work covers hot water cylinders, air-to-air heat pumps and homes heated by oil, LPG or gas, and the jobs we see most are deciding which kind of heat pump suits the home and moving away from fossil-fuel heating.
Terraced houses in a London area like Carshalton can suit a heat pump well, as long as there’s a sensible spot for the outdoor unit and its noise is checked against the MCS planning standard.
Warranty periods vary by brand and by product. For example, Daikin’s standard warranty on split air conditioning is 2 years, and its longer extensions apply to its air-to-water units only. Whatever the brand, the manufacturer’s terms are explained on your quote.
- Location
- Carshalton (SM5, SM1, SM6)
- Wider area
- Greater London
- Quotes
- A fixed-price quote up front
- Typical price
- £8,000–£16,000 before the grant, 0% VAT on homes
- Approvals
- NICEIC approved, F-Gas certified, MCS
- Call
- 07833 053749
- Page updated
- 30 October 2026
Carshalton: your questions answered
Is planning permission needed for a heat pump in Carshalton?
That depends on the building and where the outdoor unit goes. A conservation area takes in the middle of Carshalton. A heat pump on a house can be permitted development if it meets the conditions, including the MCS noise check, but not within the grounds of a listed building, and in a conservation area the outdoor unit cannot face a road. Where necessary, we check with Sutton council, which is usually the planning authority for Carshalton.
Can you fit air conditioning in a London flat in Carshalton?
Typically, yes, though leaseholders normally need the freeholder’s agreement. We look at where the outdoor unit could go, such as a balcony, flat roof or rear wall, and write it up for the freeholder or agent.
Are my radiators big enough for a heat pump?
The heat loss survey answers that, room by room. Rooms where the radiator is big enough stay as they are, and any that need upsizing are set out in the quote.
When will I hear back?
We reply to enquiries the same working day. For a breakdown that can’t wait, call our 24/7 emergency line.
Do you survey before quoting?
Yes, always. We diagnose before we treat: the survey shows what’s needed, where things go and what access we need, and the quote is based on that.
How much time does a heat pump install need?
It takes anything from a couple of days for air-to-air to the best part of a week for air-to-water with radiator changes. The cylinder, the radiators and the pipework make the biggest difference, and we confirm the timing with your quote.
Which brands do you work with?
Mitsubishi Electric, Daikin, Fujitsu, Panasonic, Toshiba, LG, Samsung, Mitsubishi Heavy Industries, Hitachi and others. For new systems, we recommend a brand and model to suit the job and explain why.
Different systems, different jobs
Outdoor unit position and planning
Flats have tighter limits, and an Article 4 direction can remove permitted development rights. Listed buildings also need separate consent, and we check the position for your property.
Hot water cylinders
Cylinder size is based on your household’s needs.
What affects the cost of air source heat pumps
A fixed price needs a few facts first. We look at:
- What we find on the survey or diagnosis
- One-off work versus a regular service cycle
- How easy the units are to reach
Putting several jobs into one visit often makes better use of the time. Mention every unit or room you need covered, and you will get one fixed price.
Asking for a quote
To help us quote quickly, please include:
- The address and the type of property
- Wide pictures of the room or the existing unit
- The fuse board and where it is in the property
VAT is set out clearly on every quote, and the rate that applies to your job is stated. Homes, businesses and different kinds of work can be treated differently for VAT, so we confirm it on the quote. To get one, call us on 07833 053749 or email us.
Heat pumps in Carshalton: local notes
About 39% of homes in the Carshalton area were built between the wars, according to the Valuation Office Agency’s council tax figures. Whether the walls and loft have been insulated makes a real difference to the heat pump size for homes of that period. For a London home, the outdoor unit position and the MCS noise check need careful planning.
If your home is near Carshalton station and heated by a gas boiler, an air-to-water heat pump can replace it where the survey shows it suits. Nonsuch Mansion lies about 2.7 miles west. Owners of listed homes need consent before a heat pump is fitted, so it’s one of our first questions.
Carshalton is about 4 miles south-east of Wimbledon, in Greater London. Whether you’re in the middle of Carshalton or further out, our engineers cover air source heat pumps, from a single room to a whole building. 764 places in Greater London are on our list.
Our nearest recent job to Carshalton was on Throwley Way, Sutton (SM1), about 1 mile west: installing two LG wall-mounted units in the open-plan working area and a third unit in the client meeting room.
That includes properties on Station Road, High Street and The Square and the roads around them. All of SM5, SM1 and SM6 is covered, from busy streets to back roads. Close to Carshalton, our area also takes in The Wrythe (1 mile north), Wallington (1 mile east), St Helier (1 mile north-west), Rosehill (1 mile north-west) and Benhilton (1 mile west). Larger places within reach include London (10 miles north), City of Westminster (10 miles north), Marylebone (10 miles north) and Kensington (9 miles north).
Local landmarks in Carshalton
Around Carshalton, our work takes us to homes and businesses near The Railway Tavern, Carshalton Park and Sutton College of Learning for Adults, among other places. Carshalton has its own railway station: Carshalton station. Other landmarks nearby include St Helier Hospital (1 mile north-west) and Centrale Croydon (2.9 miles east). Open spaces near Carshalton include Duppas Hill and Sutton Ecology Centre Grounds.
Places near Carshalton
Also in Carshalton
How the visit works
If the system has to be off for part of the visit, we tell you before any work starts, so you can plan around it. In a business, work can often be done one area at a time. The work takes a few days on site, depending on the cylinder, the radiators and the pipework involved. A few pictures of the room, the outside wall and the fuse board help us plan a job in Carshalton.
- We find out about your home and the heating you have now.
- We measure heat loss for every room.
- From those figures we size the heat pump and decide on radiators, cylinder and outdoor position.
- You get a fixed price, with any grant and the VAT set out.
- We install, commission and register the system under MCS.
Before we arrive
- Keep pets out of the rooms we are working in
- Clear access to the fuse board
- Tell us about any building rules, permits or sign-in
How to get a quote
For a fixed-price quote, ring 07833 053749 or email us with the address and a few details about the rooms or units involved. Photos help a lot. You will hear back from us the same working day.
Advice
Aftercare tips
Aftercare is straightforward, and it helps at the next service:
- Seal draughts where you can
- Use the settings explained at handover
- Read the manufacturer’s warranty terms for your brand
Now and then in cold weather, the outdoor unit defrosts itself. You might see steam or hear the unit change note, and that’s normal.
Have the system serviced regularly. Check the manufacturer’s terms, as they may include servicing conditions.
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