An EWS1 form is a set way for a building owner to confirm to valuers and lenders that an external wall system, including any cladding, has been assessed by a suitable expert - and whether any works are required to meet fire safety standards. It can only be completed by a qualified fire engineer.
The EWS1 form is not a building safety certificate or a legal requirement. The form has been endorsed by the Royal Institution of Chartered Surveyors (RICS), UK Finance and the Building Societies Association.
You only need the EWS1 form if you want to buy, sell or re-mortgage and your valuer or lender requires one. In April 2021 the Royal Institution of Chartered Surveyors (RICS) changed their guidance about the type of buildings that need an external wall system (EWS1) form.
If you are unsure whether you need the EWS1 form for your building, please read the guidance from RICS.