How to cool a new build in Oldham

A new build has the reverse problem to an old one. The tight, heavily insulated shell that holds winter warmth in is just as good at keeping summer heat from escaping, so once sun through large windows and everyday internal heat build up indoors, there is no easy way out. A single-aspect flat, with openings on one side only, cannot draw a cross-draught to shift it. The issue is common enough now that Part O of the Building Regulations sets overheating limits for new homes directly. More insulation would only make things worse; what a home like this needs is mechanical cooling, and a unit that cools in summer and heats efficiently in winter fits a new build that frequently has no gas connection at all. For a typical Oldham new build, the median floor area is around 99 sqm - over that footprint of sealed, airtight construction, the trapped heat described above has nowhere to go once the windows are shut.

What those figures mean for your cooling is the real story: the fabric is on the efficient side, great for heating costs yet quick to trap warmth once a heatwave sets in, and these are predominantly modern-build stock, tight enough that once heat gets in it has nowhere to go - which is why the overheating bites harder here than the weather alone suggests. Oldham is a town where a large share of solid-walled pre-1919 stock warms slowly but then holds onto that heat long after a hot spell arrives; locally, air quality (PM2.5) averages about 7.4 µg/m³ and daytime noise around 41 dB - the factors that decide whether opening a window at night can replace running a cooling system. This is historic ground, too: a small share of these homes sit inside a conservation area - which is why the planning route for an outdoor unit needs more care here than the approval rate alone suggests. Being near a listed building is not the same as your home being listed.

For most Oldham new builds, the strongest option is an air-to-air heat pump - a modern high-wall or ceiling unit, the same hardware people loosely call "air conditioning", except it heats as well as cools. It is near-silent, controllable room by room, and because it does both jobs it can replace your existing heating entirely. There are two honest ways this plays out, and which one applies to you turns on a single decision: whether you replace your heating or keep it. For context, a typical Oldham new build runs around 99 sqm and already costs about £327 a year to heat - the baseline the figures below are measured against.

Branch 1 - replace your direct-electric heating, and the £2,500 grant is in play. The £2,500 air-to-air grant (Boiler Upgrade Scheme) only pays when the heat pump replaces your fossil-fuel or electric heating and is fitted by an MCS-certified installer. So if you take out your existing system and let the air-to-air heat pump handle your heating as well as your cooling, a job costing around £2,800-£3,220 installed can come down to roughly £300-£720 net. Eligibility is per-property and depends on your current heating and the installer's accreditation - our checker confirms it against your address. (Grant rules as of August 2026 and subject to change.)

Branch 2 - keep your boiler and simply add cooling, and the grant does not apply. If you want to keep your existing heating and only add cooling, that is a private-pay job - a cooling-only add-on that keeps your boiler is not eligible for the £2,500 grant, whatever your heating type. The sensible choice here is usually a single-split air conditioning unit (around £1,500-£3,000 installed), carried out by an F-Gas / REFCOM-registered engineer - not MCS, which applies only to the grant-eligible heat-pump route above.

We match you to the right accreditation for whichever path fits your home: MCS for the grant-eligible heat pump, F-Gas / REFCOM for a pure cooling install. For a typical new build in Oldham at around 99 sqm, sized to that footprint, our checker leans toward air-to-air heat pump, but your own floor, aspect and heating decision move the answer - which is the whole point of checking your specific address.

Oldham's genuinely low conservation-area coverage works in your favour on planning. A house fitting an outdoor condenser usually clears permitted development without extra paperwork, though flats do not get the same automatic route and typically still need Oldham Council's permission for a front or side unit. In Oldham, conservation areas such as Denshaw, New Delph and Hey are where this bites hardest. One recent rule change matters here. As of May 2025 an air-to-air heat pump counts as a heat pump for planning, so a house can often install one under permitted development within the size and siting limits - whereas a pure cooling unit, which only cools, still needs a full planning application. Which system fits your home therefore decides which planning route you are on. For a typical new build here, our checker's read is: planning permission is likely required. External condenser units must meet permitted-development noise limits regardless of planning route. This is an indicative assessment only - always confirm the final position with your Local Planning Authority (LPA) before installing. Listed-building status was not confirmed - if this building is also listed, listed-building consent will additionally be required. Oldham carries genuinely low conservation-area coverage (about 4% of EPC-certified homes), which makes an external unit a lower-friction proposition here than in a heritage-dense borough for most addresses - a real advantage, not a workaround. It is very doable - Oldham Council approves plenty of these - but it is a step, not a formality, and it is exactly the kind of thing worth checking against your specific address before you commit. Treat this as indicative guidance, not legal advice.