Builders for the cheapest granny flats in NSW typically charge around $120,000 to $160,000 for a basic standard build, depending on size, design, and site conditions. This usually covers a simple 1-bedroom or compact studio-style layout with standard finishes and basic inclusions. More affordable designs are usually achieved by keeping the floor plan small, using cost-effective materials, and avoiding complex architectural features.
Companies like Master Granny Flats generally offer entry-level packages designed to keep costs low while still meeting NSW approval requirements. These packages often include design, council or CDC approval, and full construction under a single fixed-price contract. However, the final cost can increase if the site requires extra preparation, utility upgrades, or custom design changes.
In most cases, even the cheapest granny flats in NSW must meet building codes and compliance standards, which sets a realistic minimum cost threshold. While budget options are available, pricing below around $120,000 is uncommon for fully approved and livable builds.