The Building Safety Levy came into force in England on 1 October 2026, introducing a new charge on many residential development projects. The levy forms part of the wider building safety reforms implemented following the Grenfell Tower tragedy and is intended to create a fund to pay for the cost of rectifying life-critical safety and fire defects in existing residential buildings.
What is the Building Safety Levy?
The levy will apply to most new residential developments in England and will be calculated by reference to the amount of residential floorspace created. Rates will vary between local authority areas and are intended to reflect differences in local property markets.
The levy will be payable by developers, in relation to major residential developments, that result in a net increase of:
- 10 or more new dwellings;
- Or 30 or more new bedspaces, in purpose-built student accommodation.
The levy also applies to existing building which are redeveloped, and undergo a change of use, to residential dwellings.
Are Any Developments Exempt?
The legislation provides for a number of exemptions and reliefs, including certain forms of affordable and social housing. Other categories of development may also fall outside the scope of the levy, depending on the nature and scale of the scheme.
The availability of any exemption should be considered on a project-specific basis.
Avoidance
The regulations contain provisions which are designed to prevent avoidance of the levy via subdivision by adopting an aggregate calculation. So if a large, phased development is covered by a master planning consent, any subsequent building control notices will be aggregated back to that consent.
This also applies to developments which are split and built out by multiple different bodies – if covered by a single, overarching planning permission, the levy is calculated for the entire development and split out to each developer.
Why Does it Matter?
The levy introduces a further financial obligation for residential developers at a time when many schemes are already contending with rising construction costs, planning obligations, infrastructure contributions and regulatory requirements.
Developers, funders, landowners and promoters should ensure that the potential levy liability is reflected in development appraisals, viability assessments and contractual arrangements at an early stage.
When Will the Levy Apply?
A key feature of the regime is that liability is linked to the building control process, rather than the grant of planning permission. In broad terms, developments that enter the building control process on or after 1 October 2026 may be caught by the levy.
As a result, developers with live projects should carefully review programme dates and milestones to understand whether a scheme is likely to fall within the new charging regime.
Looking Ahead
The impact of the Building Safety Levy is already a significant consideration for residential development. Careful planning, accurate viability modelling and early legal advice will be important in managing the additional cost and ensuring that projects remain commercially viable.