Home WA Government Publications BA20 – Notice and request for consent to encroach or adversely affect BA20 – Notice and request for consent to encroach or adversely affect Form Prescribed forms for the building approval process. Last updated: 23 November 2024 View all Building Act forms Documents BA20 – Notice and request for consent to encroach or adversely affect (Word) (DOC, 138KB) BA20 – Notice and request for consent to encroach or adversely affect (PDF, 94.02KB) Sidebar Published 7 November 2024 Provided by Department of Local Government, Industry Regulation and Safety > Building and Energy Print this page Share Facebook share(Opens in a new tab/window) X(Opens in a new tab/window) LinkedIn(Opens in a new tab/window) Copy URL