Prepare the brief
Send photographs, the address and a description of the problem or desired layout. Mention accessibility, concealed pipework and any known leaks or earlier repairs.
Clarify investigation
A final price may require inspection of routes, materials and connections. Ask which findings are confirmed and which items remain provisional until the installation is exposed.
Compare the full scope
Include materials, labour, testing and waste handling. Wall or floor repairs, tiling and decoration may be separate; agree responsibilities before work begins.