Designing now for the Future Homes Standard

The Future Homes Standard is the next step in the Building Regulations for new dwellings in England, intended to produce homes that are zero-carbon ready: substantially lower in emissions than under the 2021 edition of Approved Document L, and needing no further work on the building itself as the electricity grid decarbonises. For anyone starting a self-build now, the practical question is which decisions to take today so that the house is not obsolete on the day it completes.

As at 9 September 2026, check the current position on gov.uk before fixing a specification. The standard has been consulted on and its detail and implementation date have moved, so a specification written from a two-year-old article is a poor basis for a building contract.

What the standard is intended to require

The direction of travel has been consistent even where the detail has not.

New homes are expected to be heated by low carbon systems rather than fossil fuel boilers, which in practice means heat pumps for most detached and semi-detached houses, and heat networks for some higher-density schemes. Fabric performance is expected to improve, though the consultation set out options that differed on how far. Photovoltaic generation has featured in the proposals. And the overall target has been framed around a home that does not need retrofitting later to reach zero carbon.

Two things that are not part of it, and are often confused with it. It is a Building Regulations standard, not a planning policy, so it applies at Building Control stage rather than at the point of permission. And it does not by itself require an Energy Statement with a planning application; that requirement comes from the local plan.

Why timing matters for your programme

Building Regulations changes operate with transitional arrangements, and the shape of those arrangements decides which standard your house is built to.

The pattern used for the 2021 uplift was that a building notice, initial notice or full plans deposited before the change date kept the earlier standard, provided work on that individual building started within a defined period afterwards. The important refinement was that it applied building by building rather than across a whole site, which closed a loophole that had allowed large sites to run on an old standard for years.

For a single self-build the consequence is simple. If your programme straddles a change date, you may have a choice, and the choice is worth costing rather than defaulting. Building to the newer standard from the start avoids a house that is compliant on paper and dated in practice, and it protects resale value.

Check the transitional wording in the version actually made, not in the consultation.

Heating decisions that are hard to reverse

A heat pump is not a boiler swap. Designing for one changes the house.

Emitter sizing is the main constraint. A heat pump operating at 45°C flow needs larger radiators or underfloor heating, and retrofitting either into a completed house is disruptive and expensive. Size the emitters for a low flow temperature from the first heating layout, even if the appliance decision is not final.

Hot water strategy is the second. A cylinder needs a location, and in a compact plan the airing cupboard has usually been designed out by the time anyone raises it. Allow for a cylinder of realistic size, and think about secondary circulation losses in a house with a long run to the ensuite.

External space is the third. An air source unit needs a position with adequate airflow, a sensible pipe run, and enough separation from neighbouring windows to keep noise acceptable. Put it on the planning drawings. Adding it later can amount to development in its own right, and on a constrained plot the good positions run out quickly.

Electrical capacity is the fourth. Heat pump, hot water, an electric vehicle charger and induction cooking together change the supply requirement, and distribution network operator lead times are long.

Fabric decisions that survive any version

Whatever the final standard says, these are worth doing and none of them is reversible after the frame is up.

1. Continuous insulation with a clear line drawn on a section, checked at every junction including the wall to floor and wall to roof interfaces.
2. Calculated thermal bridging values rather than default figures, with the accredited details actually specified in the construction drawings.
3. An airtightness target the contractor has agreed, with a written strategy for the air barrier and a tested result.
4. Mechanical ventilation with heat recovery designed alongside the airtightness target, with duct routes drawn rather than assumed.
5. Glazing area and orientation set for the plan, with shading where the elevation faces south or west.

The last one is where energy and overheating meet. Approved Document O applies to new dwellings, and the large glazed gable that improves the winter energy result frequently fails the overheating check. Run an Overheating Risk Assessment at the same time as the energy work, so the shading, opening areas and ventilation strategy appear on the elevations you apply for.

How this interacts with planning conditions

Energy conditions on planning permissions are usually written against the edition of Part L in force when the permission was granted. That creates two problems as standards move.

A condition requiring a percentage improvement over a superseded edition is ambiguous once that edition is gone. Where you can, ask for the condition to be expressed as an outcome, referring to the approved energy statement and to the Building Regulations in force at the time of construction.

And a condition requiring the approved measures to be installed and retained binds you to the specification you submitted. If you later improve the design, or substitute a different heat pump, you may technically depart from the approved details even though the house performs better. Agree changes with the authority rather than assuming an improvement is unobjectionable.

Where the local plan sets its own energy target, the Sustainability Statement usually carries the wider commitments on water, materials and waste, and on larger schemes a Whole Life Carbon Assessment may be requested as well.

What to say in a planning submission now

Write the energy statement against the Building Regulations edition in force, state that edition, and describe the heating strategy in terms the design actually supports. If the house is designed for a heat pump with low temperature emitters, say so and show the emitter strategy. If photovoltaics are proposed, put the array on the roof plan at the size assumed in the calculation, because an array added later on a constrained roof may not fit where the model assumed it.

Then add a short paragraph on future standards: what the design does that anticipates them, and what has been left capable of upgrade. Officers respond well to that, and it costs nothing.

Illustrative example: a single plot with permission granted on a gas boiler specification and a modest fabric package. The owner revisits the design before starting on site, moves to an air source heat pump with underfloor heating downstairs and oversized radiators upstairs, adds a cylinder cupboard by taking 0.8 m² from a bedroom, and puts the external unit on the north elevation behind a screen shown on a revised elevation drawing. The changes needed a minor amendment application and added cost at the front end. Retrofitting the same changes after completion would have cost several times as much.

Enter your postcode on PlanScope to see which reports a new dwelling is likely to need, and see PlanScope pricing for what a draft costs.

This is general guidance, not legal advice; the Future Homes Standard and its transitional arrangements should be checked against the current position on gov.uk, and confirmed with your local authority Building Control or a qualified professional, before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.