Eight days after commencement, the practical questions around England’s Building Safety Levy are becoming clearer. The regulations have been available for months; the operational test is now whether developers, advisers, building control teams and contractors have the right information moving through live projects.
The levy came into operation on 1 October 2026 under the Building Safety Levy (England) Regulations 2025, SI 2025/1236. The 2026 amendment regulations, SI 2026/1034, made on 12 September 2026, also came into force on that date.
This article is educational information, not legal, tax, valuation or investment advice. It applies to England only. The tax position and administrative guidance are time-sensitive: verify the current Schedule 3 rate and latest GOV.UK guidance before relying on this briefing.
What changed on 1 October?
The Building Safety Levy is a tax on certain new residential buildings. It is calculated by reference to chargeable floorspace, collected by the relevant local authority and ultimately transferred to central government, net of administration costs. Revenue must be spent on building safety and contribute to remediating building safety defects in England.
It may apply to:
- new residential development;
- new purpose-built student accommodation (PBSA);
- conversions from non-residential to residential use;
- additional floorspace added to an existing residential building; and
- relevant communal areas serving chargeable homes or PBSA.
The levy does not extend to Scotland, Wales or Northern Ireland. The Scottish Government has announced a separate Scottish Building Safety Levy from 1 April 2027. That is a different measure.
The collecting authority is the local authority where the building is situated, regardless of whether building control is being handled by the local authority, a Registered Building Control Approver (RBCA) or the Building Safety Regulator (BSR). Where a building straddles a local authority boundary, the relevant authority is generally the one containing the greater part of the building.
The three charging conditions
All three conditions in regulation 15 must be met.
1. The works are, or form part of, a major residential development
The threshold is:
- 10 or more new dwellings; or
- 30 or more new PBSA bedspaces.
The important point is that the threshold is judged by reference to the planning permission for the development, not simply the number of units in an individual building control application.
A seven-house application can therefore be chargeable if it forms part of a planning permission for 50 houses. Dividing a larger scheme into applications below the threshold does not, by itself, avoid the levy.
For internal-only conversions or changes of use, the relevant planning permission is the permission for that change of use.
2. The works create new residential floorspace
Chargeable floorspace includes:
- new non-exempt dwellings;
- new PBSA; and
- relevant communal areas serving chargeable dwellings or PBSA.
Where existing chargeable residential floorspace is reconfigured, only the net additional floorspace is counted. If floorspace is removed in one location and added elsewhere, the net additional dwelling or PBSA floorspace and net additional communal floorspace should be calculated separately. A negative result is treated as nil.
3. The client is not an exempt person
An exempt person is a non-profit registered provider of social housing or a wholly owned subsidiary of one. A joint venture is not exempt unless every party is itself an exempt person.
The liability therefore sits with the client identified in the building control application or initial notice. It does not sit automatically with the main contractor, trade contractor or masonry subcontractor.
How the charge is calculated
The basic logic is:
Applicable rate per square metre × chargeable floorspace
Residential floorspace is measured using gross internal area (GIA), with reference to the RICS Code of Measuring Practice, sixth edition.
Communal areas require particular care. If a lobby, car park or other shared space serves both chargeable and exempt units, only the chargeable proportion is included. The calculation is made across the whole development covered by the planning permission, not merely the block containing the communal area.
For example:
- a 50 sq m lobby serving 500 sq m of chargeable flats and 200 sq m of exempt flats produces 35.71 sq m of chargeable lobby floorspace;
- a 40 sq m car park serving 1,200 sq m and 1,500 sq m of chargeable flats, and 1,900 sq m of exempt flats, produces 23.47 sq m of chargeable car park floorspace.
The rate depends on the local authority area. Previously developed land (PDL), commonly called brownfield land, attracts a rate equal to 50% of the standard rate. Development under permitted development rights is charged at the PDL rate.
The rates above are illustrations from the GOV.UK guidance and Schedule 3 at commencement. For example, 1,000 sq m of chargeable floorspace in Manchester would produce an illustrative charge of £28,440 at the standard rate, or £14,220 at the PDL rate. That is arithmetic based on the published rate, not a scheme-specific liability assessment.
The brownfield qualification is not automatic
For a site to qualify for the discounted PDL rate, at least 75% of the land within the planning permission redline must be previously developed. The test is assessed on the date planning permission was granted or, if earlier, when development began.
The 2026 amendments clarify that:
- wholly underground buildings do not qualify as previously developed buildings;
- unlawful operations are excluded from the definition;
- underground parts of a building are excluded from the 75% calculation.
The definition of “building” can include permanent man-made structures such as roads, car parks, loading bays, pavements, runways and drainage. However, land is not PDL where the relevant building was used for agriculture or forestry, or where the land was developed for minerals extraction or landfill waste disposal.
A PDL claim should therefore be treated as an evidence exercise, not a label attached to a site because it was previously occupied.
Exempt uses and excluded developments
The distinction between an exempt person, an exempt use and an excluded development is important.
Social and supported housing uses generally require levy information and evidence, resulting in a notice of no charge. Relevant categories include most affordable rent, social rent and intermediate rent homes provided by a local authority or registered provider, shared ownership dwellings, qualifying discounted rental properties and First Homes subject to the relevant conditions.
Social housing delivered by a private developer under a section 106 obligation can also qualify for exemption. If evidence is not available at commencement, a levy update notice may be submitted up to completion so that the charge can be recalculated.
By contrast, Schedule 1 developments do not require levy information and do not need a notice of no charge. These include schools, hospitals, hotels and hostels, care homes and hospices, children’s homes, secure residential accommodation, accommodation for victims of domestic abuse, almshouses, temporary accommodation for homeless people, armed forces accommodation, and Ministry of Defence or Crown properties.
Extensions or improvements that create no new dwelling or PBSA bedspace also fall outside the levy information requirements.
The process and the completion risk
The levy should be managed as a project control, not as an end-of-project administration item.
At application or initial notice stage, levy information must be included where the work relates to new dwellings or PBSA. Missing information can lead to rejection, although rejection decisions may be appealed.
The first commencement notice must contain further information and supporting evidence for all works in the application, even if the commencement notice covers only part of those works. Later commencement notices for the same application can confirm that the information has already been supplied.
The collecting authority normally has:
- five weeks, or eight weeks where a spot check is carried out, for the local authority and RBCA routes;
- seven weeks, or ten weeks with a spot check, for the BSR route.
These periods can be extended by written agreement or where further information is requested. A spot check may test the planning permission, GIA schedules, PDL evidence and exemption evidence. A site visit is not expected.
The levy can be paid after the liability notice and before completion is notified. However, the whole charge for the application must be paid before a completion certificate or final certificate can be issued for any of the works within it. A levy payment certificate should be issued within two weeks of payment.
This is particularly important for phased schemes. Paying for the final block alone will not necessarily be sufficient if the relevant building control application covers a wider programme.
At completion, the client must provide a levy liability statement confirming either that the charge has been paid in full or that a valid notice of no charge was issued. Authorities must refuse a completion certificate or reject a final certificate where an outstanding levy charge remains.
What developers and advisers should have in place now
A practical control framework should include:
| Control | What to confirm |
|---|---|
| Building control route | Whether full plans, an RBCA initial notice or the BSR route applies |
| Levy status | Chargeable, exempt use, excluded development or outside scope |
| Floorspace | GIA schedules split between chargeable units, exempt units and communal areas |
| PDL evidence | Redline analysis, site plans, photographs and evidence of lawful previous development |
| Exemptions | Planning conditions, section 106 agreements, undertakings or contracts with registered providers |
| Programme | Determination windows, spot-check allowance, payment and the two-week payment certificate |
| Ownership | A named person responsible for levy data, submissions, notices and payment |
The MHCLG circular letter of 10 September 2026 also reminds practitioners that the levy does not apply to building notices under regulation 12. Full plans applications are already required in certain cases, including buildings subject to the Regulatory Reform (Fire Safety) Order 2005, buildings fronting a private street and work involving building over sewers. The circular notes that many new dwellings may front a private street at the point of application.
Contractors, cost consultants, project managers and masonry or brickwork subcontractors should expect levy information to appear in tender and pre-construction documentation. They should distinguish between providing project information and assuming the client’s statutory liability. A contractor should not offer to “handle” levy liability for the client without a clear and properly documented contractual basis.
Developers should also maintain a change-control process. A change in client, the proportion of exempt dwellings or the supporting evidence may lead to a levy update notice and recalculation. If the charge reduces, a refund may be due, but refunds do not attract interest.
A client may request a review in writing within 28 days of a liability notice, revised notice or refund decision. The collecting authority must review within 28 days and respond within 28 days. A further appeal to the First-tier Tribunal is available within 28 days on grounds including an error of fact or law.
Industry concerns and limitations
The Home Builders Federation’s explainer records industry concerns about viability and cash flow, including the timing of liability relative to sales receipts and the cumulative effect of regulatory costs. Those are industry body concerns, not a basis for predicting house prices, sales rates, delivery volumes or investment returns.
The guidance has already been amended once. Local authority administration and payment mechanics may vary, and the outcome for any particular scheme depends on its planning permission, ownership, floorspace, use, evidence and wider viability. Those matters cannot be assessed from this article.
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Sources and date basis
This briefing uses:
- SI 2025/1236, made 19 November 2025;
- SI 2026/1034, made 12 September 2026 and in force 1 October 2026;
- GOV.UK Building Safety Levy guidance: Section 1;
- GOV.UK Building Safety Levy guidance: Section 2;
- GOV.UK Building Safety Levy guidance: Section 3;
- MHCLG circular letter of 10 September 2026; and
- Scottish Government: Scottish Building Safety Levy.
The GOV.UK guidance was updated in July 2026 and may be updated again.