Commercial Building Disputes: Proof and Remedies

Identify the Contract and the Disputed Work

Identify the contracting entities and the work each promised before drafting the claim or response. Match the executed agreement to its specifications, drawings and incorporated conditions. Keep later amendments with the version they change. A trading name on an invoice needs to be connected to the legal entity claiming payment.

Start the file with a short issue sheet. Record the project location, contracting parties, scope of work, disputed obligations and the client’s requested outcome. Distinguish a claim for an unpaid contract sum from a claim for rectification costs. Where the client wants work completed, record the work remaining and the proposed access arrangements.

For each disputed variation, identify who requested it and the authority that person held. Attach the instruction, quotation, approval correspondence and any required notice. A site discussion, a priced variation and an authorised change can be different events. Record disagreements about each event separately.

Contract administration depends on the agreed form. For example, the NSW Government’s GC21 authorised-person guidance assigns specific responsibilities for instructions, programmes and payment administration. Use the actual contract to establish who had each role in your matter.

Classify the obligation by its source. Defective construction under a building contract belongs in this file. A dispute over sale proceeds or title needs the different evidence covered in commercial property litigation. An ongoing obligation to repair premises under a lease needs a separate lease analysis, even where a contractor also performed work at the property.

Reconcile Claims, Payments and Variations

Give each progress claim a reconciliation that connects the claimed work to certification and actual receipts. Record the amount claimed, amount certified, retention withheld, credit adjustments and payments allocated. Preserve the difference between a disputed amount and an unpaid amount.

Use one row for each claim or variation, with source references for the invoice and supporting records. Where a payment covers several invoices, record its allocation and the evidence supporting that allocation. Mark any remaining allocation dispute explicitly.

A Hypothetical Progress Claim

Assume a contractor issues a $110,000 progress claim. The payment certificate records $90,000, with $4,500 retention withheld from that certified amount. The principal pays $70,000 towards the certificate. All amounts in this example are GST-inclusive.

The $15,500 is the unpaid certified balance on these assumptions. The separate $20,000 certification difference still needs an entitlement analysis. Neither figure establishes the outcome of a statutory payment claim or the final contractual account.

Incorrect inference: a $70,000 transfer proves that every variation in the invoice was approved. Correct use: the transfer supports a payment of $70,000, while the instructions and contract records address variation authority.

Check reversals, refunds and payments made by related entities before treating the schedule as complete. Keep retention distinct from cash already paid. This prevents a retained amount from appearing again as a separate unpaid invoice.

Reconcile the Retention Claim

Continue the hypothetical example with $4,500 opening retention held. Assume the fictional contract makes that retention releasable after the defects period ends and a specified certificate is issued. Record the clause and evidence that each condition occurs before treating the retained sum as due.

The deduction remains an asserted adjustment until its contractual basis and evidence are resolved. Keep both positions visible, with each deduction linked to the relevant defect and cost record. Reconcile the closing retention balance to the final account without counting it again in an unpaid progress claim.

Where the matter includes substantial bank-statement evidence, FinTrace saves hours of conversion and statement review by delivering a searchable ledger and a clear findings report. Each finding cites the source PDF filename and page, so the supporting evidence is already at hand. You can use those payment records alongside the contract and certification documents when preparing the reconciliation.

Connect Defects and Delay to Loss

Connect each alleged defect or delay to a particular obligation and the loss claimed from its breach. Prepare a chronology showing instructions, access, work progress, inspections and notices. Give every event a document reference and identify any conflicting account.

For defects, preserve photographs and inspection records before rectification changes the site. Record the specified standard, observed condition, proposed repair and the cost attributed to it. Identify where an engineer, quantity surveyor or other suitably qualified expert must address technical questions. QCAT’s building-dispute guidance describes expert evidence and a process for identifying areas of agreement and disagreement.

For delay, compare the contractual programme with actual progress. Record extensions requested or granted, the notices relied on and the events said to affect completion. A late invoice alone does not explain why completion moved. Put the asserted cause beside the work it affected and the resulting period of delay.

Separate rectification estimates from amounts already spent. Keep unpaid contract sums and consequential losses in distinct schedules. For every loss, record its calculation, supporting document and the issue that connects it to the alleged breach. The economic-loss evidence guide explains how to connect financial loss to its asserted cause.

Check for overlap before adding the schedules together. If a completion quote includes repairing a defective wall, counting the same wall again under a separate rectification estimate duplicates that cost. Record an alternative claim as an alternative, with the shared component identified. For lost rent or trading loss, document the period, actual receipts, expenses avoided and mitigation steps underlying the calculation.

Check the Forum and Complete the Dispute File

Choose the procedure by jurisdiction, the work and parties involved, the amount disputed and the relief sought. Check statutory coverage and exclusions against the applicable construction-payment legislation. Record the relevant contract regime, including transitional rules, before relying on a payment timetable.

In NSW, section 14 of the Building and Construction Industry Security of Payment Act 1999 governs payment schedules. The NSW payment-response guidance explains that a schedule identifies the claim, scheduled amount and reasons for withholding payment. Its response period is 10 business days after receipt of the claim, subject to a shorter period under the contract. The NSW security-of-payment overview explains that shorter contractual deadlines apply.

Record the receipt evidence and service method, then calculate the applicable deadline. An informal discussion about defects is not a substitute for assessing the payment-schedule requirements. Keep the statutory payment process separate from the wider assessment of final contractual rights.

Queensland has different forum prerequisites. The Queensland Civil and Administrative Tribunal (QCAT) can decide commercial building disputes up to $50,000. Above that amount, written consent to its extended jurisdiction is required. Its guidance also requires a Queensland Building and Construction Commission (QBCC) letter recording the dispute-resolution outcome or that no process is required. QCAT cannot review a security-of-payment adjudicator’s decision.

For a court claim, check the court’s monetary jurisdiction, power to grant the remedy and applicable pre-action requirements. Read any contractual dispute-resolution or arbitration clause before selecting the route. The commercial litigation guide covers the broader preparation of claims and evidence. These NSW and Queensland examples supply no national response timetable.

Complete an indexed file containing the operative contract and amendments, notice and service records, payment reconciliation, technical issues and loss schedules. Add the client’s instructions on the remedy, settlement authority and next procedural step. Record who will obtain each missing document or expert opinion.

Before sending the file for advice or filing, trace every claimed amount to its source and every requested remedy to the obligation relied on. Confirm that urgent response steps have an assigned person and deadline. The completed file must show which sums are paid, which entitlements remain disputed and which technical questions need expert evidence.