The Building Safety Levy starts across England on 1st October 2026, bringing a new building-control charge into force for qualifying residential development.
For developers close to submitting, timing can matter as much as the calculation. Building control applications made before 1st October stay outside the levy regime. Relevant applications made on or after commencement enter it, subject to the levy’s charging conditions and exemptions.
Government guidance specifically warns that a pre-October application rejected for failing the required standards and resubmitted on or after 1st October will be liable. That makes the final days before commencement more than an administrative deadline.
Building Safety Levy creates a hard 1st October divide
Regulation 1 of the Building Safety Levy (England) Regulations 2025 says the levy does not apply to a building control application made before commencement. A later variation application or commencement notice also remains outside where it relates to an original application made before 1st October.
“The Building Safety Levy will come into effect on 1 October 2026.”
Ministry of Housing, Communities and Local Government guidance
The protection is tied to the original application, not simply to work having been prepared or submitted once. The same guidance says an application rejected before commencement and then resubmitted on or after 1st October can enter the levy regime.
For schemes near the line, that makes the status of the building-control application worth checking now.
Brownfield rules are now final, not draft
The Building Safety Levy (Amendment) (England) Regulations 2026, SI 2026/1034, were made on 12th September and come into force on 1st October. They are no longer draft regulations.
The amendments sharpen the levy-specific test for previously developed land, which can attract a lower levy rate.
Wholly underground buildings do not count for the test. When calculating whether at least 75% of the relevant land is previously developed, any underground part extending beyond the part of the building above ground is disregarded.
The definition of a building is also widened for this purpose. Permanent buildings and other permanent man-made structures or erections can count, including reinforced, paved or otherwise surfaced areas, plant and machinery. Operations that are not lawful within section 191 of the Town and Country Planning Act 1990 do not qualify.
That means a planning-policy description of a site as brownfield is not enough on its own. Planning Geek’s detailed Building Safety Levy guide covers the 75% test, rates, exemptions and evidence in more depth.
Permitted development is not a levy escape
Class MA and other permitted development routes do not provide a general exemption from the Building Safety Levy.
Government guidance on levy rates says chargeable development where planning permission is granted through permitted development rights is charged using the previously developed land discounted rate. That is a rate rule, not an exemption from the levy itself.
This is particularly relevant to conversion schemes. The guidance confirms that building work creating new residential floorspace can be chargeable even where there is no increase in the building’s overall footprint.
Levy sits beside CIL and planning fees
The Building Safety Levy is separate from Community Infrastructure Levy and planning application fees. Paying or avoiding one does not answer whether another applies.
Developers therefore need to treat the levy as its own building-control cost and compliance process. The immediate questions are whether the application falls before or after the commencement line, whether the development is chargeable or exempt, and whether the previously developed land test can be evidenced.
MHCLG also wrote to building control bodies on 10th September reminding them that the levy comes into operation on 1st October. This is now an implementation issue, not a policy proposal waiting for another announcement.
With commencement only days away, a valid pre-October application can make a material difference. A draft submission, a rejected application or an assumption that Class MA avoids the levy cannot safely be treated the same way.
For the wider funding context, the Government’s latest cladding remediation figures show that 46% of monitored buildings had still not started work at the end of August.
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