Southampton · Heat pump installation
Air Source Heat Pumps in St Mary's
For heat pump installation in St Mary's, one call is all it takes, from the first look to sign-off. F-Gas certified, NICEIC approved and Checkatrade members.
- A boiler that is getting old
- Deciding on the outdoor unit position
- Questions about listed buildings or conservation areas
Heat pumps in St Mary's: local notes
The coast is only about 1 mile from St Mary's. Salt air is hard on outdoor units, so a heat pump near the sea needs a sensible position and regular checks, and some models offer corrosion protection for coastal sites. The Valuation Office Agency’s council tax figures show about 40% of homes across St Mary's and its surrounding area were built in 2000 or later, and the last census (2021) found about 77% of households live in flats. Newer homes usually lose less heat, which tends to suit a heat pump well. For flats, the first questions are where an outdoor unit could go, whether a cylinder fits and what the lease allows.
Homeowners near Southampton Central station often ask whether a heat pump can take over from the boiler, and the heat loss survey answers that. If your home is listed, like Southampton Tudor House and Garden about 0.6 miles south-west, listed building consent comes before any heat pump work.
St Mary's is about 1 mile south of Southampton, in Southampton. Properties in St Mary's get the same service as everywhere we cover: diagnosis first, a fixed price and proper paperwork when we’ve finished. St Mary's is one of 40 places in Southampton where we work. We also work in Guildford, about 43 miles from St Mary's.
Every address in SO14, SO15 and SO18 is within our area, from busy streets to back roads. Local streets include New Road, Ogle Road and Marsh Lane, and we cover them all. We also cover the places around St Mary's: Northam (1 mile north-east), Inner Avenue (1 mile north), Peartree Green (1 mile east), Southampton (1 mile north) and Bitterne Manor (1 mile north-east). Further out, we also cover Chartwell Green (3 miles north-east), Harefield (3 miles east), Maybush (3 miles north-west) and Coxford (3 miles north-west).
Local landmarks in St Mary's
Locally, jobs take us to houses, flats and workplaces close to The Joiners pub, Woolston School and Houndwell Park, among other places. The closest station to St Mary's is Southampton Central station, roughly 0.8 miles west of the centre. Well-known places in the area include Netley Castle (2.5 miles south-east) and Bargate Guildhall Museum (within half a mile south-west). Open spaces near St Mary's include Netley Common.
About our air source heat pumps in St Mary's
Air source heat pumps collect heat from outdoor air and bring it inside with electricity running the compressor and fans. The technology is close to air conditioning, which is why we install both, and air-to-air heat pumps are sometimes simply called air conditioning. The work covers air-to-water heat pumps, hot water cylinders and homes heated by oil, LPG or gas, and the jobs we see most are checking whether planning permission is needed and a boiler that’s getting old.
Whether a home near St Mary's has mains gas makes a difference to the grant. Until March 2027, homes on oil or LPG without mains gas can get an extra £1,500 through the Boiler Upgrade Scheme.
Equipment warranty comes from the manufacturer, on its own terms, and we set them out on your quote. Each brand sets its own conditions, so we go through them with you rather than leave you to find the small print.
- Where
- St Mary's (SO14, SO15, SO18)
- Region
- Southampton
- Costs
- £8,000–£16,000 (0% VAT on homes), before the grant
- Quotes
- Fixed-price quote after a site survey
- Credentials
- NICEIC and F-Gas, MCS
- Phone
- 07833 053749
- Checked
- 30 October 2026
The process
Our engineers arrive at the time agreed with you and run through the plan before anything else. Floors and furniture near the work are covered with dust sheets, and anything electrical is made safe before work starts. On site, it takes several days for an air-to-water system with a new cylinder, less for an air-to-air system. Photos of the room and the outside wall help us plan a job near St Mary's.
- You tell us about the home and what you want from a heat pump.
- We survey for heat loss and look at radiators, cylinder space and outdoor unit options.
- We explain which type of heat pump suits the home and whether a grant could apply.
- The system is installed and connected to the controls.
- After commissioning, you get the MCS certificate and a handover.
Preparing for the visit
- Clear access to the fuse board
- Unlock any gate, garage or side passage we need
- Keep pets out of the rooms we’re working in
Get a fixed-price quote
Quotes don’t take long. Call or email with a few details and we will come back to you the same working day. If we need to see the property first, we book a survey at a time that works for you.
Related advice
When something else is needed
A few issues sit outside what this work can do:
- Tax advice on your own circumstances
- Grants for hybrid systems or replacements of low-carbon systems
- Disconnecting or servicing a gas boiler
If in doubt, call 07833 053749, or email if that’s easier and we’ll say what we think before booking.
What we work on in St Mary's
- Air-to-air heat pumps
- Homes heated by oil, LPG or gas
- Underfloor heating
- Radiator systems
- Hot water cylinders
- Air-to-water heat pumps
How the job changes from property to property
The Boiler Upgrade Scheme
Only one grant is available per property, and it cannot replace a low-carbon system. Hybrids are excluded.
Radiators and underfloor heating
If radiators need upsizing, the quote lists them, so you know the full scope.
Looking after it afterwards
Looking after it is simple, and it helps at the next service:
- Seal draughts where you can
- Keep the outdoor unit clear all year
- Let the heat pump run steadily, as set up at handover
We show you how to use the controls and explain how a heat pump works differently from a boiler. Steady running suits a heat pump better than switching on and off, and we’ll explain the settings for your home.
Don’t cover radiators with furniture or heavy curtains, as the system relies on them giving out heat.
St Mary's: your questions answered
Does being near the sea make a difference to air source heat pumps in St Mary's?
It can. St Mary's is within about 1 mile of the coast, and salt air speeds up corrosion on outdoor units. We site outdoor units out of the worst of the sea wind where possible and can suggest models with corrosion protection where the manufacturer offers it.
Will a heat pump in St Mary's need planning permission?
It comes down to the building and the spot chosen for the outdoor unit. The half-mile around the middle of St Mary's holds about 49 listed buildings and structures. Heat pumps on houses are often permitted development, but listed buildings need consent and conservation areas restrict outdoor units facing a road. Where it’s needed, we check with the planning department at Southampton council, typically the authority for St Mary's.
Are my radiators big enough for a heat pump?
That depends on the room’s heat loss and the radiator’s size. We check them all during the survey and the quote shows what’s needed.
Do you work on systems someone else installed?
Yes. We look at it first and tell you what we find, including any issues with how it was fitted. Any work is priced before it goes ahead.
Do you provide F-Gas records?
Yes, on every job. A new system comes with commissioning details, F-Gas records and the manufacturer’s warranty information, while repairs and services get a written note of what was found and done.
Can landlords and managing agents book you?
Yes. From one rented home to commercial buildings, we work the same way: a look first, a fixed-price quote and written records.
Will you make a mess?
Floors and furniture near the work are covered with dust sheets before work begins, and we tidy up as we go. At the end, we clear up and show you what we’ve done.
Towns and villages near St Mary's
Other services in St Mary's
A customer’s words
“Excellent service from start to finish. Two wall-mounted units installed in our home. Clean, tidy work: they protected all the floors and left no mess. The systems work brilliantly. Would highly recommend.”
Sarah M., East Grinstead