About Building Safety Levy Calculator
Joe, who reads the Building Safety Levy Regulations and the collecting councils' own pages and builds them into a calculator, each rate checked against Schedule 3.
Why this site exists
The levy has 298 rates and a brownfield half rate; most guides print a handful. The calculator carries every one, straight from the Regulations.
Who it is for
Housebuilders, land buyers and their advisers pricing new residential schemes in England.
What is on this site
One question, "building safety levy calculator", answered with a calculator that works on the page with no account, 3 guides on the questions around it, a data table you can cite (the figures and their method), and the sources every figure rests on.
- Who pays the Building Safety Levy, and when: Who pays the Building Safety Levy: developers of 10 or more new homes or 30 or more student bedspaces in England, on building control applications from 1 October 2026.
- Building Safety Levy rates by council: standard and brownfield: Building Safety Levy rates per m² by council, from Schedule 3: £12.70 in County Durham to £100.35 in Kensington and Chelsea, with the brownfield half rate.
- Building Safety Levy brownfield rate: the 75% test and the half rate: The Building Safety Levy's previously developed land rate: 50% of the standard rate where at least 75% of the site within the red-line boundary is brownfield.
What it does not do
- We do not give tax, legal, regulatory or investment advice.
- We do not pass your enquiry to any firm.
- We do not use a rate we have not checked against the Regulations.
Who answers for it
Joseph Ellul-Turner, Director.
Reach us
Contact for a question about the site, or enquiries@buildingsafetylevycalculator.co.uk. The legal terms are on Terms and Privacy.
This calculator applies the rates in Schedule 3 of the Building Safety Levy (England) Regulations 2025 to the figures you enter; it is not legal, tax or planning advice and the collecting authority's levy notice is the figure you pay. An enquiry sent through the form is read and answered by Joe, who runs this site; no firm receives it.