Have a liquidated damages clause in case of problems (Peter).
We hope your building process is a smooth one. If, however, you find yourself in dispute with your builder, and you cannot resolve the dispute yourself, then the Domestic Building Dispute Resolution Victoria (DBDRB) may be able to help. The DBDRB offers free advice and conciliation for domestic building disputes. For more information, follow this web link http://www.vba.vic.gov.au/disputes-and-resolutions or contact the BACV on 1300 55 75 59 (between 9:00am and 5:00pm). You now are required to go through DBDRV as a first step to resolving your differences before applying to the Victorian Civil and Administrative Tribunal (VCAT) https://www.vcat.vic.gov.au/case-types/building-and-construction.
Have everything in writing; disagreement, agreements, allowances, options etc (Albert).
Read the contract and negotiate the terms. Do not automatically accept their terms (Ivo).
Read your contract and be aware of exactly what is in the contract. For example, if you do not specify that the builder is to remove all rubbish, then the builder might not keep the site clean and leave it up to you to keep the site clean (Trini Ley).