BSL

Building Safety Levy Calculator

Minimum estimate, based on the Nationally Described Space Standards
INDICATIVE MINIMUM ONLY
Not a substitute for a formal BSL assessment

Answer a few questions about your development and get an approximate minimum Building Safety Levy figure — either from a known floor area, or estimated from your planned dwelling mix using government minimum space standards. New to the levy? Start with the guide.

01
Site
02
Area
03
Result
01

Development details

02

Floor area

Don't worry — we'll work out a minimum baseline from the Nationally Described Space Standards (Table 1).

Bedrooms Bed spaces 1 storey 2 storey 3 storey Subtotal (m²)
Min. area (m²)No. dwellings Min. area (m²)No. dwellings Min. area (m²)No. dwellings
TOTAL 0 0.0
Residential floor area subtotal (before communal uplift) 0.0 m²
Communal area allowance — 15% of residential floor area 0.0 m²
Total minimum development area (calculated) 0.0 m²
03

Result

Minimum Building Safety Levy estimate
Your development — fill in the details above
Complete the form above to see your estimate.
Estimated minimum levy
View breakdown ↓