Start with the same brief
Give each contractor the same suburb, rough length and height, access measurements and photos. Mention nearby fences, paths, driveways or other structures. Ask what they need to confirm during a site visit.
Compare the scope line by line
Look for removal of the old wall, spoil disposal, site preparation, wall materials, drainage and reinstatement of paths or fencing. Ask whether these are included, excluded or provisional.
Ask who coordinates outside work
Ask who will check whether engineering or approvals are needed and who will organise and pay for them if required. Confirm who handles changes discovered once work begins.
Check how the total can change
Ask for a written scope, a price that identifies GST, and the process for approving variations. Ask whether the quote assumes clear access or a specific ground condition.
Build a quote request