Provided that you hold a Domestic Building Contract with your builder, the builder cannot deny you access to your property to have an independent inspection conducted.
Please note that if you give the builder more than two working days’ notice of your requirement to enter the home, the builder MUST open the dwelling under the “Domestic Building Contracts Act 1995”, part 2 section 19 (Victoria). You can lodge a complaint with the DBDRV if they refuse. In other words, if the builder has been notified, then he or she must open the dwelling.
Domestic Building Contracts Act 1995 Act No. 91/1995 Part 2—Provisions that Apply to all Domestic Building Contracts Access to building site (1) A builder must permit the building owner (or a person authorised by the building owner) to have reasonable access to the building site and to view any part of the building works. Penalty: 20 penalty units.