The core differences
Volume builders (Metricon, Fairmont, Simonds, AusBC): Standardised floor plans, national supply chains, fixed inclusions, 10-14 month timelines. Cheaper per sqm. Less design flex.
Custom builders (HPG, boutique architects, small local firms): Bespoke design, real conversations, longer timelines, higher per-sqm cost. You get exactly what you designed - and you pay for the design too.
Cost gap in 2026
- Volume: $1,600 – $2,400/sqm
- Custom: $2,500 – $3,800/sqm
- Custom architect fees add another 6 – 12% of the build cost
When each wins
Volume wins: flat block, standard family plan works, budget is the top priority, you want certainty on timeline and price.
Custom wins: sloping/awkward block, specific lifestyle needs an off-the-shelf plan can’t solve, you value the design process itself, budget flexibility.