Reference tool

Build-Under Budget Estimator

Scales the Coorparoo project ratios to your floor area and specification level. Use the output as a structural reference alongside your own current trade quotes.

Figures are from a 2018-2020 build. How to use them →

This site is general information only. It is not building, legal, financial or certification advice. Read our full disclaimer →

Coorparoo project scaling tool

Coorparoo ratios scaled to your inputs.

New ground floor area (m²)

The Coorparoo enclosed habitable build-under was 112.5 m²

Specification level

Standard Builder-grade finishes, functional fit-out (~$2,250/m² owner-builder, 2026 guide)

Premium Better finishes, double-glazed windows, mid-range fixtures (~$3,750/m² owner-builder, 2026 guide)

Luxury High-end finishes, stone benchtops, premium fixtures (~$5,250/m² owner-builder, 2026 guide)

Raise height

2.4 m (standard) Minimum compliant height for a liveable room

2.7 m (comfortable) Good ceiling height, popular choice

3.35 m (11 feet: Coorparoo project) Adds ~$8,000 to structural costs, 10-12% more to build cost

What this estimate includes

Included

House raising (contractor + temporary works)
Structural engineering
Concrete slab
External and internal wall framing
Rough-in services (electrical and plumbing)
Windows and external doors
External cladding
Insulation and plasterboard
Bathroom and laundry fit-out
Flooring and painting
Permits, certifier and engineering fees

Not included

Upstairs renovation or extension
Kitchen (ground floor)
External landscaping, driveway, fencing
Structural issues with existing house
Asbestos removal
Site-specific conditions (access, soil, slope)
Builder's margin (if not owner-builder)
Contingency (budget 10-15% extra)

Next step

Get the free Build-Under Budget Tracker

The Coorparoo line items as a read-only reference spreadsheet. All 8 categories, every line item, the actual figures paid.

Download the budget tracker See the full cost breakdown