Hertfordshire · Heat pump installation
Heat pump installation in Westmill, Hertfordshire
F-Gas certified and NICEIC approved, we cover Westmill for MCS certified installation of air source heat pumps for heating and hot water, with the Boiler Upgrade Scheme grant applied for. A fixed price before work begins, and a 24/7 emergency line.
- Finding a place for the outdoor unit
- Comparing heat pump types
- Questions about listed buildings or conservation areas
Air source heat pumps for homes and businesses in Westmill
Installing an air source heat pump in a home is zero-rated for VAT until 31 March 2027, then 5%. That follows HMRC Notice 708/6, and it doesn’t apply to businesses, and for air-to-air systems we confirm the VAT on your quote. This is general information, not tax advice. We’re often asked to deal with checking whether planning permission is needed and plans to switch to electric heating with a heat pump, across homes heated by oil, LPG or gas, air-to-air heat pumps and air-to-water heat pumps.
If your home near Westmill has no mains gas, the grant can be bigger. Until March 2027, homes on oil or LPG without mains gas can get an extra £1,500 through the Boiler Upgrade Scheme, for an air source or ground source heat pump.
Nothing is signed off by word of mouth: commissioning details and F-Gas records for a new system, a note of the fault and the fix for a repair, or a service record. File it with the manual so it’s to hand next time.
- Location
- Westmill (SG5)
- Wider area
- Hertfordshire
- Price
- A fixed-price quote up front
- Prices
- £8,000–£16,000 (0% VAT on homes), before the grant
- Credentials
- F-Gas certified company, NICEIC approved, MCS
- Response
- Same working day
- Telephone
- 07833 053749
- Page updated
- 30 October 2026
What air source heat pumps cannot fix
Before booking, it helps to know what’s not included:
- Planning decisions, which rest with the council
- Tax rulings, which only HMRC can give
- Improving the building’s insulation
If in doubt, call us on 07833 053749 or email us and we will say what we think.
What the work covers
- Hot water cylinders
- Underfloor heating
- Radiator systems
- Air-to-water heat pumps
- Homes heated by oil, LPG or gas
- Air-to-air heat pumps
System by system
Outdoor unit position and planning
Under permitted development, the outdoor unit must be 1.5 m³ or less and must meet MCS 020(a) and not be used solely for cooling. Listed building curtilages are excluded.
Hot water cylinders
Cylinder size is based on your household’s needs.
Homes in Westmill and heat pumps
About 33 miles out from central London, Westmill is part of the South East area we work across.
A heat loss calculation decides the size of heat pump your home needs. Live in one of the older houses around St Mark's? Expect the survey to look closely at heat loss and at the building’s planning status.
Westmill is about 1 mile north-west of Hitchin, in Hertfordshire. Our engineers cover Westmill for air source heat pumps and across the rest of Hertfordshire. Westmill is one of 381 towns, villages and districts in Hertfordshire where we work for homes and businesses. London, roughly 33 miles off, has its own page on this site.
Postcode districts we cover here: SG5. Westmill sits on or near the A600, so getting to you is simple. Close to Westmill, our area also takes in Bearton (1 mile east), Hitchin (1 mile south-east), Ickleford (1 mile north), Benslow (1 mile south-east) and Charlton (1 mile south). We also work in nearby towns such as Stevenage (6 miles south-east), St Albans (14 miles south), Welwyn Garden City (12 miles south) and Harpenden (10 miles south).
Around Westmill
In Westmill, that means homes and buildings near Sir John Barleycorn pub, St Mary's Church and The Priory School and the streets around them. The nearest railway station is Hitchin station, about 1.2 miles east of the centre. A little further out are Fairfield Hospital (3.5 miles north-east) and North Hertfordshire Museum (0.7 miles south-east). The countryside around Westmill includes Markham's Hill and Oughtonhead Nature Reserve.
Rented and managed buildings
From a single flat to a whole estate, you get the same standard: a look at the job first, a fixed-price quote, work booked with the occupier and written records afterwards.
If you look after several properties, we can plan visits across the portfolio and price them together. Every address has its own paperwork, so the files stay tidy.
Questions from Westmill
Is a heat pump in Westmill permitted development?
That depends on the building and where the outdoor unit goes. The half-mile around the middle of Westmill holds about 4 listed buildings and structures. On a house, an air source heat pump can often go ahead under permitted development, with an outdoor unit of no more than 1.5 cubic metres and an installation that meets MCS 020(a), which includes a noise check. Those rights do not reach the grounds of a listed building, and conservation areas rule out walls or roofs facing a road. If that might affect you, we ask North Hertfordshire council, which is typically the planning authority for Westmill.
Do you cover smaller places like Westmill?
Yes, and the size of the place makes no difference to how we work. A few photos and the postcode are enough to get things started.
Are my radiators big enough for a heat pump?
That depends on the room’s heat loss and the radiator’s size. The survey compares each radiator with the room’s needs, so the quote covers any changes.
Who has to arrange F-Gas leak checks?
Whoever operates the equipment, together with the technicians who service it. Systems below 5 tCO2e fall outside the set leak check intervals, while larger ones need checks at least every 12 months, or every 6 months from 50 tCO2e. We can tell you which band your system falls into.
Is there a survey before the work?
Yes. We always look before we price, on a survey, or from your pictures and details where the job is simple. Then you get a fixed-price quote.
How quickly will you reply?
On the same working day you contact us. Then we agree a date that works for you, and you get a fixed price before any work goes ahead.
How much time does a heat pump install need?
An installation takes a few days for most air-to-water installations, with air-to-air systems often quicker. We confirm the timing after the survey, so ring 07833 053749 or send an email to arrange one.
More services for Westmill
What happens on the day
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 a few days for most air-to-water installations, with air-to-air systems often quicker. Getting to the outside of the property matters more than parking in a place like Westmill.
- We find out about your home and the heating you have now.
- We measure heat loss for every room.
- We design the system, check the radiators and cylinder and look at the outdoor unit position.
- Cost, grant and VAT appear on one fixed-price quote.
- We install, commission and register the system under MCS.
Preparing for the visit
- Keep pets out of the rooms we’re working in
- Make sure we can reach the consumer unit or fuse board
- Arrange for someone to be there to let us in
Getting a price
The quickest way to a quote is to send pictures: 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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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