COLA cost and budget
How much does a school COLA cost in Australia?
A school COLA in Australia typically costs $150 to $250 per square metre for a shade-only (permeable) structure, $450 to $750 per square metre for a waterproof covered area, and $500,000 to $1.2 million or more for a large clear-span sports court over 400 square metres. Actual cost depends on span, roof material, site access, soil conditions, and fit-out.
Project-size bands A small covered area under 200 square metres typically ranges from $80,000 to $150,000. A mid-size multi-purpose space of 200 to 400 square metres falls between $250,000 and $500,000. Clear-span engineering (no internal columns) costs more than the same area with columns at regular intervals because the steel members must be heavier to bridge the gap.
Material and fit-out impact PVC fabric membrane sits below the metal price range when compared on equivalent outcomes. Once bird-proofing, acoustic treatment, electrical lighting, and insulation are added to a steel COLA, the total is often 10-20% higher than PVC. PVC also reduces ongoing electrical lighting costs during school hours because the membrane transmits 9 to 13% of natural light.
Lifecycle view The steel frame under a PVC COLA has a 50-year design life, and the PVC membrane lasts 30-plus years with replacement costing approximately 20 to 30% of the original build (the frame stays). On a $1 million project, that equates to roughly $250,000 to $300,000 at membrane replacement.
What drives COLA pricing up or down?
The biggest cost drivers for a school COLA are span width and clear-span engineering, roof material and weatherproofing level, site access and soil conditions, design complexity, and the scope of fit-out inclusions. Moving from shade-only to waterproof, or from a columned structure to clear-span engineering, can shift the total into a significantly higher band.
Span, clearance, and material Span and clearance height affect structural loading calculations directly. A 30-metre clear span requires heavier steel members than the same width with mid-span columns, and sport-grade ceiling heights (8.3 metres for netball) add to wind loading. Gable profiles are the most cost-efficient layout; curved barrel vaults or custom shapes add fabrication cost. Angled or curved steel costs more than rectangular because steel favours straight lines.
Site and soil Site access on a live school campus, such as between buildings or along narrow pathways, increases construction logistics costs. Soil conditions requiring deeper or more complex footings push the price up, particularly where rock, clay, or a high water table is present. Coastal locations need hot-dip galvanising or additional coatings to resist salt corrosion. Schools in bushfire zones may require metal roofing based on Bushfire Attack Level (BAL) rating.
Fit-out and add-ons Cost-adding inclusions commonly include skylights, end infills, bird-proofing mesh, acoustic soffit lining, electrical lighting, PA systems, retractable basketball hoops, tiered seating, and side skirts for wind-driven rain protection. How these items are treated in a quote (upfront or as potential variations) has a direct bearing on final cost certainty.
What hidden costs should schools watch for in COLA quotes?
The most common hidden costs in school COLA quotes are footings, site works, services (power, lighting, drainage), council approvals, project management, and items like acoustic treatment and bird-proofing left off the base price. Footings are the single most frequent source of variation because many quotes exclude them or price them as provisional sums that change once ground conditions are known.
Footings and ground conditions When footings are listed as provisional or excluded, the approved budget reflects an incomplete number. Once excavation begins and actual soil conditions are assessed, a variation claim typically follows. Ground-penetrating radar during site investigation identifies underground utilities and unusual soil profiles before they become surprises on site.
Commonly omitted line items Beyond footings, quotes often exclude electrical lighting, PA and AV provisions, acoustic treatment (important where assemblies are held), bird-proofing (required for some state government compliance), and gutter guards and downpipe protection. Traditional procurement paths with separate architect, engineer, and builder contracts also add margin at each handoff, so the total cost usually exceeds what any single party quoted.
Fixed-scope budgeting A design-and-construct arrangement can price everything upfront after a site investigation, including footings, site works, services, approvals, and project management. Greenline uses this approach under its Consult. Design. Construct. methodology, which locks the budget before construction begins. When comparing competing quotes, the most useful question to ask every builder is: what is excluded from this number?
What grants are available for school COLA projects in Australia?
Grant funding for school COLA projects in Australia comes from three main sources: Australian Government programs, state and territory government programs, and non-government school authority funds. Available grants depend on the state, school sector (government, Catholic, or independent), and whether the project serves a sporting, educational, or community purpose.
State government programs In Queensland, the School Subsidy Scheme is an ongoing program available to state school communities, assisting with the cost of school-managed facility projects. In NSW, the Capital Grants Program administered by the Association of Independent Schools of NSW (AISNSW) supports capital works at independent schools in economically disadvantaged areas. The Community Building Partnerships Program also provides grants for community infrastructure projects including education facilities. In Victoria, the Building for Non-Government Schools stream supports capital builds and upgrades at low-fee Catholic and independent schools.
Sport-specific funding When the COLA covers a court, sport-specific grants may apply. Tennis NSW's Facility Enhancement Fund supports tennis infrastructure. The Australian Cricket Infrastructure Fund supports clubs, associations, schools, and councils.
How to find the right program Grant programs change annually and vary by state, so the most reliable way to identify suitable funding is a directory organised by state and school type, updated against current program rounds.
See the Greenline grant resources directory
