Planning
Gold Coast Cost Guide
Straight answers on budget ranges and what drives cost. This page is designed to save you time (and filter out unrealistic expectations).
Quick ranges (typical)
Every project is different. These are common ranges we see on the Gold Coast for quality builds with proper planning, compliance, and trade coordination.
Extensions
Base build: typically $3,000-$4,000/m² depending on complexity and finishes.
- 30-40m² ground floor extension: $100k-$150k
- 40-60m² extension: $150k-$250k
- Second storey additions: commonly $250k-$350k+
Large renovations
Renovations vary heavily based on the existing structure, access, and how much is changing.
- Bathrooms: from $35k (full strip and redo)
- Ensuites: from $30k
- Major renovations: project-dependent
Secondary dwellings
Typical timeline is 6-9 months including design, approvals, and construction.
Costs depend on size, site constraints, services, and finishes. We'll give you a realistic range after a quick feasibility call.
Dual occupancy
Dual occ projects are feasibility-driven (zoning, setbacks, parking, services, slope). If it's viable, we can manage the process end-to-end.
What drives cost on the Gold Coast
- Tie-ins to existing homes: older frames and out-of-plumb structures add labour and detail work.
- Access: tight sites, steep driveways, or limited laydown areas slow everything down.
- Approvals: DA/BA pathways, referrals, and certifier requirements vary by site and scope.
- Coastal exposure: corrosion-resistant materials and detailing matter near the water.
- Finish level: fixtures, joinery, glazing, and tile selections change budgets quickly.
A quick note on "cheap" quotes
If a quote looks too good to be true, it usually is. The most common blowouts come from missing scope, vague allowances, and variations. We price properly upfront so you can plan with confidence.