Construction Contract Red Flags Australia: What Investors Should Read Before Signing

Signing a construction contract is one of the biggest financial commitments most property investors make, yet it's often the document read most quickly. Builders and their sales teams are experienced at getting contracts signed; investors are usually signing their first or second one.

A poorly worded or one-sided contract can cost tens of thousands of dollars in variations, delays, and disputes down the track. Before signing anything, it pays to know what the common red flags look like.

Vague Or Missing Specifications

A proper building contract should include a detailed specification document listing exact inclusions — brands, models, and finishes for kitchens, bathrooms, flooring, and fixtures. If the specification simply says 'as selected' or refers to a generic display home standard, you have no real protection against downgrades.

Ask for the full specification schedule before signing, and cross-check it against what was promised verbally or in marketing material.

Provisional Sums That Are Too Low

Provisional sums are estimated allowances for items like site costs, electrical connections, or driveways that can't be fixed until more information is known. Some builders quote unrealistically low provisional sums to make the headline price look attractive, then hit you with variations once the real cost comes in.

• Site costs and soil classification allowances
• Electrical and data connection allowances
• Driveway and landscaping allowances
• Stormwater and sewer connection allowances
• Any allowance that seems well below market rate for the area

Unclear Variation And Price Escalation Clauses

Look closely at how the contract handles variations, delays, and rising material costs. Some contracts include clauses that let the builder pass on cost increases with little notice or cap, particularly in fixed-price contracts signed well before construction starts.

You want clear caps on rise-and-fall clauses, a defined variation approval process requiring your written sign-off, and transparent pricing for any changes you request.

Weak Timeframes And Liquidated Damages

Check what the contract actually commits the builder to on timing. Some contracts state a commencement date 'subject to finance and approvals' with no genuine end date, and liquidated damages clauses for late completion are sometimes capped so low they provide little real incentive to finish on time.

• A defined commencement date tied to specific conditions being met
• A realistic construction period based on the build type and location
• A liquidated damages rate that reflects your actual holding costs
• Clear conditions under which extensions of time can be claimed

Payment Schedules Out Of Step With Progress

Progress payment stages should roughly reflect the value of work actually completed. Be wary of schedules that front-load payments — for example, a large payment due at 'base stage' before slab and footings represent that proportion of the build cost. This shifts risk heavily onto you if the builder runs into financial trouble.

Final Word

Construction contracts are written to protect the builder first; it's up to you and your legal adviser to make sure your interests are covered too. Reading every clause, querying provisional sums, and confirming specifications in writing takes time, but it's far cheaper than a dispute mid-build.

Always have a solicitor experienced in building contracts review the document before you sign, and don't let sales pressure push you into skipping that step.