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.
Plots in Mid Glamorgan with tight boundaries benefit from fixing the outdoor unit position before landscaping is finalised. Small developments near Mid Glamorgan can be designed plot by plot, with heat loss worked out from each house type's drawings. For barn conversions and replacement dwellings near Mid Glamorgan, the design starts from the specification of the new walls, floors and glazing.
Who it suits
- Homes designed with underfloor heating on one or more floors
- Architects and builders who want a heat loss design from the drawings
- Small builders and developers working on one-off homes or small groups
- Replacement dwellings and major conversions treated as new homes
Grants and rules for heat pumps in Wales
In Wales 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; £2,500 for air-to-air). The MCS-certified installer named in your quote applies to Ofgem for you, and the grant comes off your quote.
Installing heat pumps is zero-rated for VAT across the UK until 31 March 2027. Wales has its own permitted development rules for air source heat pumps, so we check what applies to your property, including listed building and conservation-area constraints, at the survey.
New-build and self-build heat pumps prices in Mid Glamorgan
These are guide prices for Mid Glamorgan, 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 | £9,500–£12,500 |
| 2–3 bedroom terrace or semi | 5–7 kW | £10,500–£13,500 |
| 3 bedroom semi or small detached | 6–9 kW | £12,000–£15,500 |
| 4 bedroom detached | 8–12 kW | £14,000–£18,000 |
| 5+ bedroom or larger older house | 11–16 kW | £16,500–£22,500 |
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 Mid Glamorgan
We cover 11 towns in Mid Glamorgan for new-build and self-build heat pumps. Each links to local guide prices and the grant position for Wales.
| Town | Postcode district | Nearest town | Midwinter daylight |
|---|---|---|---|
| Bridgend | CF31 | Porthcawl | 7 h 49 min |
| Merthyr Tydfil | CF47 | Aberdare | 7 h 47 min |
| Pontypridd | CF37 | Llantrisant | 7 h 49 min |
| Aberdare | CF44 | Mountain Ash | 7 h 47 min |
| Caerphilly | CF83 | Pontypridd | 7 h 49 min |
| Maesteg | CF34 | Port Talbot | 7 h 48 min |
| Porthcawl | CF36 | Bridgend | 7 h 50 min |
| Bargoed | CF81 | Blackwood | 7 h 48 min |
| Llantrisant | CF72 | Pontypridd | 7 h 49 min |
| Mountain Ash | CF45 | Aberdare | 7 h 48 min |
| Tonypandy | CF40 | Pontypridd | 7 h 48 min |
New-build and self-build heat pumps questions
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.
How long does a new-build heat pump installation take?
It is split across the build. First fix typically takes a few days once the structure is up, and second fix with commissioning takes a few more days near completion. Underfloor heating in screed then follows a gradual drying-out schedule. Exact timing depends on your build programme, which we agree with your builder so trades are not left waiting on each other.
Is underfloor heating worth it in a new build?
For many new homes, yes, because underfloor heating runs at low water temperatures that suit a heat pump, and laying pipes during the build is far easier than adding them later. It also frees up wall space. Radiators cost less and respond faster, so some self-builders combine underfloor heating downstairs with radiators upstairs. The design shows the flow temperature each option needs.