A new-build heat pump is an air-to-water system designed into a home while it is on the drawing board or being built, rather than retrofitted later. Because walls, floors and glazing are being chosen at the same time, heat loss can be calculated from the drawings, and the emitters, pipework and cylinder can be planned for a low flow temperature from day one.
Builders working across Greater London can coordinate first and second fix with an installer covering Greater London. Plots in Greater London with tight boundaries benefit from fixing the outdoor unit position before landscaping is finalised. Self-builders in and around Greater London can bring us in at drawing stage so the heat pump, cylinder and pipe routes are designed in from the start.
Who it suits
- Replacement dwellings and major conversions treated as new homes
- Small builders and developers working on one-off homes or small groups
- Architects and builders who want a heat loss design from the drawings
- Self-builders planning heating alongside the structure
Grants and rules for heat pumps in England
In England the Boiler Upgrade Scheme gives £7,500 towards an air source heat pump (£9,000 if it replaces oil or LPG, from 21 July 2026 to 31 March 2027), and since 28 April 2026 a valid EPC is no longer needed. The grant is applied for by the MCS-certified installer and shown as a deduction on your quote.
There is no VAT on installing a heat pump anywhere in the UK until 31 March 2027. In England most houses can have an air source heat pump under permitted development, provided the unit meets the MCS noise and siting standards; the old 1 m boundary limit was removed on 29 May 2025. We flag listed buildings, flats and sensitive conservation-area positions at survey.
New-build and self-build heat pumps prices in Greater London
These are guide prices for Greater London, installed and including VAT. Your final price is fixed in a written quote after the survey and depends on the heat loss of the house, the radiators that need changing and where the unit goes.
| Home | Typical size | Installed guide price |
|---|---|---|
| 1–2 bedroom flat or small terrace | 4–5 kW | £10,650–£14,000 |
| 2–3 bedroom terrace or semi | 5–7 kW | £11,750–£15,100 |
| 3 bedroom semi or small detached | 6–9 kW | £13,450–£17,350 |
| 4 bedroom detached | 8–12 kW | £15,700–£20,150 |
| 5+ bedroom or larger older house | 11–16 kW | £18,500–£25,200 |
Installed, inc VAT: unit, cylinder, controls, minor pipework and commissioning. Most new builds are not eligible for grant funding, so no deduction is shown.
Towns we cover in Greater London
We cover 90 towns in Greater London for new-build and self-build heat pumps. Each links to local guide prices and the grant position for England.
| Town | Postcode district | Nearest town | Midwinter daylight |
|---|---|---|---|
| Islington | N1 | Highbury | 7 h 49 min |
| Bexley | DA5 | Bexleyheath | 7 h 50 min |
| Barking | IG11 | Ilford | 7 h 49 min |
| Sutton | SM1 | Carshalton | 7 h 51 min |
| Croydon | CR0 | Purley | 7 h 51 min |
| Ilford | IG1 | Barking | 7 h 49 min |
| Harrow | HA1 | Pinner | 7 h 49 min |
| Tottenham | N17 | Wood Green | 7 h 49 min |
| Walthamstow | E17 | Leyton | 7 h 49 min |
| Dagenham | RM10 | Barking | 7 h 49 min |
| Romford | RM1 | Hornchurch | 7 h 49 min |
| Hayes | UB3 | Southall | 7 h 49 min |
| Wembley | HA9 | Hendon | 7 h 49 min |
| Fulham | SW6 | Putney | 7 h 50 min |
| Southall | UB1 | Hayes | 7 h 49 min |
| Putney | SW15 | Fulham | 7 h 50 min |
| Battersea | SW11 | Chelsea | 7 h 50 min |
| Purley | CR8 | Coulsdon | 7 h 51 min |
| Peckham | SE15 | Dulwich | 7 h 50 min |
| Chingford | E4 | Woodford Green | 7 h 48 min |
| Uxbridge | UB8 | Ruislip | 7 h 49 min |
| Wimbledon | SW19 | Morden | 7 h 50 min |
| Brixton | SW2 | Clapham | 7 h 50 min |
| Hounslow | TW3 | Twickenham | 7 h 50 min |
| Finchley | N3 | Hendon | 7 h 49 min |
| Mitcham | CR4 | Morden | 7 h 51 min |
| Feltham | TW13 | Hounslow | 7 h 50 min |
| Acton | W3 | Chiswick | 7 h 49 min |
| Beckenham | BR3 | Bromley | 7 h 50 min |
| Chelsea | SW3 | Battersea | 7 h 50 min |
| Streatham | SW16 | Balham | 7 h 50 min |
| Eltham | SE9 | Blackheath | 7 h 50 min |
| Morden | SM4 | Mitcham | 7 h 51 min |
| Carshalton | SM5 | Sutton | 7 h 51 min |
| Catford | SE6 | Lewisham | 7 h 50 min |
| Surbiton | KT6 | Kingston upon Thames | 7 h 51 min |
| Stratford | E15 | Leyton | 7 h 49 min |
| Chiswick | W4 | Acton | 7 h 50 min |
| Ruislip | HA4 | Pinner | 7 h 49 min |
| Greenwich | SE10 | Blackheath | 7 h 50 min |
| Barnet | EN5 | Mill Hill | 7 h 48 min |
| Wood Green | N22 | Crouch End | 7 h 49 min |
| Muswell Hill | N10 | Crouch End | 7 h 49 min |
| Highbury | N5 | Islington | 7 h 49 min |
| Coulsdon | CR5 | Purley | 7 h 51 min |
| Hornchurch | RM11 | Upminster | 7 h 49 min |
| Blackheath | SE3 | Lewisham | 7 h 50 min |
| New Malden | KT3 | Kingston upon Thames | 7 h 51 min |
| Woodford Green | IG8 | Chingford | 7 h 48 min |
| Richmond | TW9 | Twickenham | 7 h 50 min |
| Barnes | SW13 | Putney | 7 h 50 min |
| Notting Hill | W11 | Kensington | 7 h 49 min |
| Pinner | HA5 | Harrow | 7 h 49 min |
| Golders Green | NW11 | Hampstead | 7 h 49 min |
| Tooting | SW17 | Balham | 7 h 50 min |
| Chislehurst | BR7 | Sidcup | 7 h 50 min |
| Orpington | BR6 | Chislehurst | 7 h 51 min |
| Balham | SW12 | Tooting | 7 h 50 min |
| Bexleyheath | DA6 | Bexley | 7 h 50 min |
| Bromley | BR1 | Beckenham | 7 h 51 min |
| Camden | NW1 | Kentish Town | 7 h 49 min |
| Clapham | SW4 | Brixton | 7 h 50 min |
| Crouch End | N8 | Highgate | 7 h 49 min |
| Dulwich | SE21 | Brixton | 7 h 50 min |
| Ealing | W5 | Acton | 7 h 49 min |
| Edgware | HA8 | Mill Hill | 7 h 48 min |
| Enfield | EN1 | Southgate | 7 h 48 min |
| Forest Hill | SE23 | Sydenham | 7 h 50 min |
| Hackney | E8 | Stoke Newington | 7 h 49 min |
| Hammersmith | W6 | Notting Hill | 7 h 50 min |
| Hampstead | NW3 | West Hampstead | 7 h 49 min |
| Hendon | NW4 | Golders Green | 7 h 49 min |
| Highgate | N6 | Crouch End | 7 h 49 min |
| Kensington | W8 | Notting Hill | 7 h 50 min |
| Kentish Town | NW5 | Camden | 7 h 49 min |
| Kingston upon Thames | KT1 | Surbiton | 7 h 50 min |
| Lewisham | SE13 | Blackheath | 7 h 50 min |
| Leyton | E10 | Walthamstow | 7 h 49 min |
| Mill Hill | NW7 | Edgware | 7 h 48 min |
| Sidcup | DA14 | Chislehurst | 7 h 50 min |
| Southgate | N14 | Enfield | 7 h 48 min |
| Stoke Newington | N16 | Highbury | 7 h 49 min |
| Sydenham | SE26 | Forest Hill | 7 h 50 min |
| Teddington | TW11 | Twickenham | 7 h 50 min |
| Twickenham | TW1 | Teddington | 7 h 50 min |
| Upminster | RM14 | Hornchurch | 7 h 49 min |
| Wandsworth | SW18 | Putney | 7 h 50 min |
| Wanstead | E11 | Leyton | 7 h 49 min |
| West Hampstead | NW6 | Hampstead | 7 h 49 min |
| Woolwich | SE18 | Eltham | 7 h 50 min |
New-build and self-build heat pumps questions
When do you need to be involved in a new build?
Ideally before the drawings are finalised, so the plant space, outdoor unit position and emitters are agreed with your architect. At the latest, the design should be done before first fix, when pipework goes in under floors and inside walls. Late involvement usually means compromises, such as a cylinder in an awkward space or pipe runs boxed in afterwards.
Where should the outdoor unit go on a new build?
Somewhere with free airflow, a solid base and drainage, away from bedroom windows and boundaries where possible, and positioned to pass the MCS noise assessment. On a new build this can be planned into the landscaping, such as a side return or screened area near the plant room, which keeps pipe runs short. Planning rules differ by nation, so we check the position at design stage.
Do new builds have to have a heat pump?
The rules depend on the nation and when your project was approved, so check with your architect or building control. New homes in England are being built to tighter carbon standards, and Wales, Scotland and Northern Ireland set their own building regulations. A heat pump is one of the main ways new homes meet these standards, and we design the heating to whichever applies.
Can a self-build get the Boiler Upgrade Scheme grant?
In some cases. In England and Wales the scheme is aimed at existing homes and most new builds are not eligible, but some self-builds can qualify depending on circumstances, so check eligibility before including a grant in your budget. If the scheme can apply, the MCS-certified installer named in your quote handles the application. Scotland and Northern Ireland are outside the scheme.