Every housebuilder I speak to knows the date: 24 March 2027, when the Future Homes Standard comes into force. What far fewer of them know is the date that actually decides whether a particular home is caught. That is the one worth planning around, writes Saghir Hussain, founder of Create It Studio Architects
The standard comes from the Building Regulations etc. (Amendment) (England) Regulations 2026, made in March this year and live on 24 March 2027 for ordinary
building work.
There is a transition period, and it has two limbs. To stay on the old standards, you need to have given the local authority a building notice, an initial notice or a full plans application for that building before 24 March 2027. Then the work on that building has to have “commenced” before 24 March 2028. Miss either and the new rules apply.
The second limb is where it bites. “Commenced” is not a generous word. Under regulation 46A, for an ordinary building it means the sub-surface structure is finished: foundations in, any basement formed and the structure of the ground floor complete. Digging a trench or starting the piling does not count. The ground floor structure has to be up.
And it is per building, not per site. This is the bit developers keep getting wrong. An early application does not throw a blanket over a whole scheme. Each building has to make its own start, in time, on its own. I have seen programmes where phase one sat comfortably inside the old regime and the later phases quietly slipped into the new one because nobody had mapped them individually.
What the standard actually contains
People describe the Future Homes Standard as a fabric upgrade. It is more like a package.
The notional building it sets includes a heat pump instead of a gas boiler, waste water heat recovery, tighter airtightness and decentralised mechanical extract ventilation, with on-site renewables in most cases.
Compliance moves to the Home Energy Model, running alongside SAP for a while.
On their own, none of those is dramatic. Together, they change the shape of a house.
Where the cost really lands
Most of the cost argument lands on the heat pump, because that is the visible change. In my experience, the money is decided much earlier. Form factor and orientation set how much energy a house loses long before anyone picks a boiler. Glazing ratios drive heat loss and, more and more, summertime overheating. Plant needs room to work: a cylinder, somewhere sensible for the heat pump, and a ventilation route that suits the plan rather than fights it. Thermal bridging is designed into the junction details long before it is built out.
Get those right at concept stage and the standard is mostly a specification exercise. Get them wrong and you are fitting compliance into a design that is already fixed. That is where it gets expensive.
The government’s own assessment makes the point better than I can. The impact assessment published with the standard found that retrofitting a home to a Future Homes Standard equivalent costs around 66% to 80% more than building to it during construction. That gap is the real cost of the standard. It is the sequence of decisions that drives it, not the kit.
What to do about it
If you have got plots that will not make the transition, the useful work is dull and specific. Map every building against both dates: application in before 24 March 2027, sub-structure complete before 24 March 2028.
Miss the window for a building and it meets the full standard, whether or not the rest of the scheme does. Any plot whose programme has the ground floor slab landing in early 2028 is a plot at risk and it is worth a look now, while the programme can still move.
For those plots, model the compliant scheme instead of assuming it. Fabric, thermal bridging and the renewables requirement all move together, and the cheapest time to find out what they add is before the house types are frozen. Once the drawings are issued and the site is running, the same answer costs a lot more to act on.
I would treat the pre-March rush with some caution too. Plenty of developers are lodging applications ahead of 2027 to hold on to the old standard, and the impact assessment expects exactly that. It works, but only if the second limb is honoured, and only building by building.
An application that protects the first two houses of a 30-house scheme has not protected much.
None of this is an argument against the standard. A home designed to it is better than one bolted on to it, and the occupier’s running costs show it. It is an argument about sequence.
The developers who get through the next 18 months well will be the ones who treated March 2027 as a design deadline rather than a construction one and found out what compliance would cost while it was still cheap to change their minds.
