What Do Construction Lawyers Do? A Practical Guide for Builders, Developers and Owners
What do construction lawyers do? The short answer
Construction lawyers advise builders, developers, subcontractors, consultants and property owners on the legal side of building projects. They draft and negotiate construction contracts, manage risk and payment obligations, recover money owed under security of payment laws, and resolve disputes about defects, delays and variations, from tender through to practical completion and beyond.
That is the definition. In practice, I find the more useful answer is this: a good construction lawyer makes sure the commercial deal a client believes they have struck is the one they can actually enforce. Construction is an industry of thin margins, layered contracts and long programmes, and the decisions that determine whether a project is profitable are usually made months before anyone thinks to call a lawyer.
This guide explains what construction lawyers do at each stage of a project, what has changed in Victoria during 2026, and how to recognise the moment when advice is worth getting.
Why construction law is its own discipline
Most commercial contracts are signed, performed and finished within a predictable window. Construction contracts are different. They run for months or years, involve many interdependent parties, and must accommodate change as a matter of course. Designs develop, site conditions surprise, materials arrive late and clients alter their brief. The contract has to allocate the cost of all of that in advance.
Overlaid on the contract is a substantial body of legislation. In Victoria this includes the Building and Construction Industry Security of Payment Act 2002 (Vic), the Domestic Building Contracts Act 1995 (Vic) and the Building Act 1993 (Vic), each of which can override what the parties have written. Construction law sits where contract, statute, insurance and project delivery meet, which is why it rewards advisers who understand how buildings are actually built.
About to sign a construction contract or subcontract? A focused review before you commit costs a fraction of a dispute afterwards. Speak with our construction law team about your project.
Before the project begins
Contract drafting and negotiation
Much of a construction lawyer’s most valuable work happens before a sod is turned. That means reviewing and negotiating head contracts, subcontracts, design and construct agreements and consultancy appointments, many of which are based on Australian Standard forms such as AS 4000 and AS 4902, or the ABIC contracts commonly used on architect-administered projects. The general conditions are rarely the problem. The risk usually sits in the special conditions and amendments, where a single clause can shift responsibility for latent conditions, design errors or delay onto a party that cannot realistically manage it.
Risk allocation and security
A well-drafted construction contract deals clearly with time, variations, extensions of time, liquidated damages, insurance, bank guarantees, retention and the defects liability period. A poorly drafted one leaves those questions open, to be argued over later at the point of greatest tension. I test each risk against a simple commercial question: who is best placed to control it, and is the price right for the party carrying it?
For domestic building work, the Domestic Building Contracts Act 1995 (Vic) adds statutory warranties, limits on deposits and progress payments, and other protections that apply regardless of the contract wording. Builders and owners alike need advice that reflects the Act, not only the document in front of them.
What construction lawyers do during the project
Security of payment claims
Once work is underway, the focus shifts to cash flow. Victoria’s security of payment act gives contractors and suppliers a fast statutory process to claim progress payments and, where payment is withheld, to refer the matter to adjudication. Amendments that commenced on 15 April 2026 have made the Victorian scheme considerably broader. The former “excluded amounts” restrictions have been repealed, so claims for variations, delay costs and latent conditions can now be pursued through adjudication, and contractual payment terms longer than 20 business days are overridden.
For those receiving claims, the stakes have risen accordingly. A payment schedule must set out every reason for withholding payment, because new reasons cannot be raised later in an adjudication response, and a late or deficient schedule can leave a principal or head contractor exposed to the full amount claimed. The reforms also created a statutory pathway to seek release of performance security such as retention, and allow certain notice-based time bars to be declared unfair. The timeframes are short and procedural precision matters, so this is an area where early advice tends to pay for itself.
Contract administration and change
Construction lawyers also advise on the everyday mechanics that shape a project’s outcome: notices of delay, extension of time claims, variation directions, suspension, show cause notices and termination. A surprising number of disputes are decided not on their merits but on whether a notice was given in the right form and within time.
When disputes arise
Construction disputes tend to centre on defective work, cost overruns, delay and unpaid invoices. When one arises, a construction lawyer will assess the contract’s dispute resolution clause, the strength of the evidence and the value of the ongoing relationship before recommending a pathway. That may be negotiation, mediation, adjudication, expert determination, arbitration or proceedings in a court or tribunal.
In Victoria, domestic building disputes generally need to go through the free dispute resolution service delivered by the Building and Plumbing Commission, which now incorporates Domestic Building Dispute Resolution Victoria, before they can proceed to VCAT. Larger commercial matters are typically heard in the County Court or the Supreme Court of Victoria. Where a dispute also involves insolvency, guarantees or a wider business relationship, it often draws on our broader commercial law practice.
When should you speak to a construction lawyer?
Earlier than most people do. The ideal time is before you sign, when risk can still be priced, negotiated or declined. The next best time is the moment something changes: a variation is disputed, a payment claim arrives, the programme slips or a notice lands on your desk. Construction rights are often time-limited, and a position that can be preserved with a well-drafted letter in the first week may be lost entirely a month later.
Advice is also worthwhile when you are taking on a new type of project or contract form, stepping into a larger role in the contracting chain, or seeing the same problem recur across several jobs. Repeated disputes usually point to something in the standard contract that can be fixed.
How we can help
At Whelan Lawyers, I approach construction matters with the same commercial lens I bring to every client relationship. My years in senior in-house roles taught me that legal advice is only valuable if it helps the business move forward, and that is the standard I hold our construction work to.
We act for builders, subcontractors, developers, consultants and property owners on contract review and negotiation, security of payment claims and responses, variation and delay disputes, defects claims and wider project disputes.
If you have a contract to review, a payment dispute developing or a project that has started to drift, contact us or learn more about our construction law services.
Frequently asked questions
What is the difference between a construction lawyer and a property lawyer?
A property lawyer generally deals with the ownership and transfer of land, including conveyancing, leasing and title. A construction lawyer deals with the process of building on that land: the contracts between owners, builders, subcontractors and consultants, the payment and risk arrangements under those contracts, and disputes about the work itself. Many developments need both.
Do I need a construction lawyer to review a building contract?
Any significant contract or subcontract benefits from review, particularly where the standard conditions have been amended. A review shows where risk sits, flags unusual clauses on time, liquidated damages, security and termination, and gives you the opportunity to negotiate before you are bound.
Can a construction lawyer help me get paid?
Yes. In Victoria, the Building and Construction Industry Security of Payment Act 2002 (Vic) provides a fast statutory process for recovering progress payments, including adjudication where a claim is disputed. A construction lawyer can prepare payment claims, make sure statutory deadlines are met and run the adjudication. Since the April 2026 reforms, variations and delay costs can also be pursued this way.
How much does a construction lawyer cost?
Costs depend on the scope of the work. Contract reviews and discrete advice can often be offered for a fixed fee, while disputes are usually estimated in stages according to the pathway chosen. A good construction lawyer will discuss costs at the outset and weigh them against the commercial value of the outcome.
Disclaimer: This article provides general information only and is not legal advice. The law is complex and varies based on individual circumstances. You should seek specific legal advice about your particular situation before making any decisions about legal matters.
Neda Whelan
Neda Whelan is the Founder and Principal of Whelan Lawyers. She brings extensive experience in commercial contracts, construction-related transactions and complex contractual negotiations. She provides practical, commercially focused legal advice to builders, contractors, developers and businesses operating across the construction and infrastructure sectors.
