The Building Safety Levy Starts 1 October: What It Means for Your London Refurbishment
From 1 October 2026, a new charge comes into force across England: the Building Safety Levy. It sits alongside a separate but related story that broke this week — the Building Safety Regulator has reported a sharp jump in Gateway 2 applications as developers and building owners rush to get schemes in before the deadline, with over 100 more live cases in August alone and a growing backlog of applications covering work inside existing higher-risk buildings too. For anyone planning a refurbishment, conversion or fit-out in London this autumn, both stories are worth understanding properly, because they land very differently depending on the size and type of project you're running.
What the Building Safety Levy actually is
The levy is a new charge collected through the building control process, designed to help fund the remediation of unsafe cladding and other historic building safety defects. It is not a fee for a specific service — it is a tax on new residential floorspace, charged per square metre and calculated by the local authority handling building control for the scheme. Unlike the Building Safety Regulator's Gateway process, which is about demonstrating a building is safe, the levy is purely financial. The two are easy to conflate because they're both being introduced around the same time and both apply to residential construction, but they are separate mechanisms with separate triggers.
Who actually has to pay it
This is the detail that matters most for Bayocorp's typical clients. The levy only applies to developments creating 10 or more new dwellings, or purpose-built student accommodation with 30 or more bedspaces. A single house renovation, a flat refurbishment, a loft conversion, or a small residential extension will not trigger it. The exemption exists specifically to protect smaller schemes and SME-led development from an additional cost that could make marginal projects unviable.
Developments that do fall inside scope include:
- New-build blocks of flats or housing schemes of 10 units or more
- Large-scale conversions creating 10 or more net additional residential units
- Purpose-built student accommodation above the 30-bedspace threshold
Social housing and supported housing floorspace is excluded from the calculation even within a mixed scheme, and conversions are only charged on the net additional floorspace created, not the whole building.
How the charge is worked out
Each local authority sets its own rate per square metre, with a standard rate and a discounted rate for previously developed (brownfield) land, which gets a 50% reduction. Rates vary considerably by borough — inner London boroughs sit at the higher end of the national range, reflecting land values, while lower-demand areas charge a fraction of that. For anyone assembling a viability appraisal or cost plan on a qualifying scheme, this needs to go into the numbers early, not bolted on once a scheme is already committed. The Federation of Master Builders has been advising exactly this to its members: treat the levy as an early viability check, because a nine-unit scheme and a ten-unit scheme can end up in very different financial positions once it's applied.
Why Gateway 2 applications have suddenly spiked
Separately from the levy itself, the Building Safety Regulator's own data shows applicants rushing to submit before 1 October, on the assumption that getting into the system ahead of the deadline is more straightforward than dealing with it afterwards. Live Gateway 2 applications for new higher-risk buildings have climbed past 1,650, an increase of more than 100 cases in a single month, with new submissions continuing into September. The regulator has attributed the surge directly to the incoming levy.
What's less widely reported, but arguably more relevant to Bayocorp's own client base, is the parallel picture for work inside existing higher-risk buildings anything 18 metres or more, or seven storeys and above, with two or more residential units. Internal refurbishment, alteration and remodelling work in these buildings also has to go through the Gateway process, and that caseload has grown too: 457 applications received in the latest 12-week period against only 143 decisions, leaving over 1,000 live cases waiting. If you're a leaseholder, managing agent or landlord planning internal works, a bathroom refit, a reconfiguration, a fire door upgrade in a qualifying block, this queue is the practical reality you're now working against, regardless of whether the levy itself applies to you.
What this means if you're planning work now
The right response depends entirely on which category your project sits in:
- If you're refurbishing a house or flat with no unit uplift, the levy doesn't apply to you directly, but if the building is a higher-risk building, expect the approval queue to be a genuine factor in your programme
- If you're delivering or converting a scheme of 10 or more units, get the levy calculation into your cost plan and viability appraisal before you commit to a scheme, not after
- If your building work sits within an existing HRB, submit early and build realistic float into your programme, the regulator's own figures show hundreds of live cases still waiting on a decision
- If you're unsure whether your scheme counts as a chargeable development or a higher-risk building, get this confirmed with your local authority or a building control adviser before you finalise budgets or start marketing timescales to clients or investors.
The regulator is getting faster, which is worth knowing too
It isn't all queueing and cost. The Building Safety Regulator's own recent figures show real improvement over the past year:
- New-build approval rate up to 92%, from just 39% a year earlier
- Median time to a decision down to 22 weeks, from 43 weeks
- In-house technical team expanded by 25 people in three months, now backed by over 500 external specialists
None of that removes the pressure of the pre-levy rush, but it's a reasonable sign that the system is maturing rather than simply getting more congested.
The practical takeaway
For most of Bayocorp's clients — homeowners and landlords doing single-property refurbishments, 1 October changes very little directly. The real value in understanding this story is knowing which category you fall into before you commit to a budget, a programme or a set of promises to your own clients or investors. For anyone working on a larger conversion, a block of flats, or refurbishment inside a higher-risk building, this is exactly the kind of regulatory shift that belongs in the pre-start conversation, alongside planning permission, Building Regulations approval and Party Wall matters, not something discovered halfway through a project.
Bayocorp works with homeowners, landlords and property professionals across London and the South East, providing refurbishment, cost planning, project management and construction delivery, including Gateway 2 and Gateway 3 support for higher-risk building work. If you're planning a project that might be affected by the levy or the Gateway process, it's worth getting that checked before your budget and programme are set in stone.
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