The Building Safety Levy (BSL) arrives on 1 October 2026. For local authority building control and planning teams, it represents one of the most significant new administrative obligations in recent memory.
It adds a complex multi-stage compliance process involving financial transactions, cross-departmental coordination and mandatory quarterly reporting to central government, on top of a workload that, for most teams, is already stretched.
This blog sets out what the BSL involves, what it will mean for your team, and where the process is most likely to cause problems if you’re not prepared.
What is the Building Safety Levy?
The Building Safety Levy is a Government-mandated charge on new residential developments in England. Introduced as part of a wider building safety reform programme in the wake of the Grenfell Tower tragedy, it’s designed to fund remediation work on buildings with unsafe cladding and other structural defects. It aims to raise £3.4bn over 10 years.
The responsibility for collecting and administering the levy will sit primarily with local authority building control teams. That’s a deliberate policy choice, and it means your authority will effectively be responsible for a revenue collection and regulatory reporting function that sits well outside the scope of traditional building control work. It isn’t a role you can opt into gradually. From the moment the BSL goes live, its obligations apply.
What local authorities will be required to do
The BSL process runs across the full lifecycle of a relevant application, and each stage will create a real piece of work for your team.
When an applicable development is submitted, you’ll need to receive the BSL-specific application and check that it contains the right information. You’ll then need to verify the Gross Internal Area (GIA) of the development, working from the floor plans submitted, either at site level or for individual plots, to establish the basis for the fee calculation. Once GIA is confirmed, you’ll need to apply the correct fee schedule, issue the charge to the applicant, request payment, track whether it’s been received, and chase any outstanding balances.
At the end of each quarter, you’ll need to pull all that activity together and file a return with the Ministry of Housing, Communities and Local Government (MHCLG) in a prescribed format. That return isn’t discretionary. Every three months, it must go in, whether your process is running smoothly or not.
None of these steps are optional. The BSL doesn’t replace any of your existing responsibilities. It sits on top of them. And because it involves complex financial transactions and reporting, the consequences of any errors will be more severe than in many other parts of your work.
Why getting GIA right is the foundation of everything
Your entire BSL fee calculation rests on the accuracy of your GIA verification. The levy is calculated as a charge per square metre of residential floorspace, which means the figure you arrive at will determine what the applicant is charged. If that figure is wrong, the fee will be wrong, and you’ll have a dispute to manage.
Verifying GIA from submitted floor plans sounds straightforward. In practice, it may require your team to measure and combine floor areas across multiple plans, often across individual plots within a larger site. Without dedicated tools to support that process, it’s time-consuming and harder to audit. If your team is working from plans in one system, doing manual calculations in a spreadsheet, then logging the result somewhere else, there are multiple points in the process at which errors can be introduced. They’ll be harder to catch before they feed into a fee that’s already been issued.
BSL compliance won’t sit neatly within building control, even though building control will carry most of the workload. Planning is involved, too, because applications need to be cross-referenced against planning permissions to establish whether a development is liable for the levy in the first place. Get that wrong, and you risk either missing a chargeable development or applying the levy where it shouldn’t apply.
Your finance team also needs to be in the picture. They’ll need visibility of what’s been invoiced and what’s been paid at any given point, without having to chase their building control colleagues for a status update. And if your local authority’s payment infrastructure needs to be connected to the BSL process, it needs to happen before October, not after.
For many local authorities, this presents a huge coordination challenge. Getting three or four teams working from the same process and the same data from day one, without a dedicated system, is unlikely to happen by default.
Many local authorities will initially try to manage BSL compliance using a mix of existing tools and spreadsheets. That approach might work, up to a point, but problems tend to start small and compound over time.
A GIA error in month one won’t just affect a single fee calculation. Depending on how your process is structured, it can carry through into your quarterly return, creating a discrepancy you’ll still be working to resolve weeks later. An untracked payment can create the same problem. Your data will look clean until it doesn’t, but by then, you may have filed an MHCLG return that needs to be corrected.
If your data isn’t structured and maintained throughout each quarter, the reporting exercise will become a significant manual task. And if MHCLG ever queries a figure, you’ll need to show your workings, which will be considerably harder if your audit trail is spread across several different systems, spreadsheets and inboxes.
How Resolution Data Management’s BSL module can help
Resolution Data Management’s BSL compliance software is built around the full end-to-end process, rather than addressing individual parts of it in isolation. It’s built on Submit-a-Plan and DataSpace Live, proven platforms already in daily use by local authority building control teams across the UK, which means every stage of the BSL workflow connects to the next without any data needing to be rekeyed, rechecked or reconciled across separate systems.
Your applicants submit their BSL-specific applications through Submit-a-Plan, the same portal they already use for building control. The process is configured to your authority’s BSL requirements, so the information arrives in the right format from the outset. From there, your team can view and measure floor plans directly within the system, using built-in tools that calculate and combine floor areas without switching platforms. Every measurement is recorded and traceable.
Once GIA is verified, the system applies your BSL fee schedule automatically, producing a documented calculation with a full audit trail. The charge goes to the applicant, and payment tracking runs through your authority’s existing payment infrastructure.
The platform then monitors what’s been requested, what’s been received and what’s outstanding, giving your administration team a clear picture at any point in the process. Crucially, the system won’t allow a certificate of completion to be issued until full payment has been collected.
When your quarterly MHCLG return is due, the data is already structured and ready. The reporting function pulls together the figures you need in the format MHCLG requires. And because the information has been built up progressively throughout the quarter, you won’t be scrabbling around at the last minute, checking your return is accurate.
No other provider currently combines a client-facing submission portal, integrated plan measurement tools and back-office compliance management in a single, cloud-based BSL solution. Every part of the process is connected, and every step leaves a traceable record.
Get your processes in place before the deadline
With October’s BSL launch date looming, your first quarterly MHCLG return will arrive sooner than you think. Setting up a reliable process now, before the pressure arrives, will put you in a much stronger position to meet your new obligations.
If you’d like to see how Resolution’s BSL compliance software works in practice, we’re happy to walk you through it. Get in touch with our team to arrange a demonstration.