AS 4902 is one of the most commonly used Design and Construct contracts in Queensland and around the country. Develop Project Management acts as superintendent under AS 4902, AS 4000, AS 4300 and various forms of government suite contracts across the Gold Coast, Brisbane, South East Queensland and Northern NSW — certifying time, cost and quality fairly, and keeping the contract on its terms from award to final certificate.
The standard forms require the superintendent to act honestly and fairly in certifying — not as the principal’s advocate. That independence is precisely what makes the certification defensible if a dispute arises.
AS 4902 (design and construct), AS 4000 (construct only), AS 4300, government suites of contracts (project and state specific), and QBCC and ABIC forms. We also advise on which standard form of contract suits your project before you commit — the right contract prevents more disputes than the best administration cures. See Contract Administration for principal-side support outside the formal superintendent role.
Twenty seven years across contractor-side, development management and client-side delivery — including design and construct projects in health, education, multi-storey residential, hotels and commercial, from hundreds of thousands to multi-billion dollar programs. We have sat on every side of the D&C table; as superintendent, all of it goes into certifying fairly.
AS 4902 is the Australian Standard general conditions of contract for design and construct — the contractor takes responsibility for completing the design and building the works, based on the Principal’s Project Requirements. It is the dominant form for D&C projects in Queensland, from commercial buildings to multi-storey residential, and is routinely used (heavily amended) by developers and government.
Everything AS 4000 requires — claims, variations, extensions of time, certificates — plus oversight of the contractor’s design obligations: reviewing design documentation as it develops, checking it against the Principal’s Project Requirements, and assessing claims that sit on the boundary between design development and scope change. The certification workload is higher and more technical because design and construction run together.
Design development is the contractor completing and refining the design they already priced — it costs the principal nothing extra. A variation is a change to the Principal’s Project Requirements — it does. The line between the two is the single most contested territory in D&C contracts, and an experienced superintendent assessing entitlement before pricing is what stops design development being re-badged and charged as variations.
The contractor — including, in the unamended form, responsibility for design work the principal’s consultants did before award if the contract passes it across. In practice the protection is only as good as the Principal’s Project Requirements: vague or contradictory PPRs hand entitlement arguments to the contractor. Investing in tight PPRs before tender is the cheapest risk transfer available on a D&C project.
Novation transfers your design consultants to the contractor after award — common on AS 4902 projects. From that moment they work for the builder, not for you. That is exactly when independent, principal-side oversight matters most: the superintendent (and any client-side project manager) becomes the only professional in the structure whose obligations run to you. See Client-Side Project Management.
The same discipline as any contract — certify what has actually been performed — with a D&C addition: design is part of the work, so claims routinely include design documentation milestones. The superintendent verifies design deliverables have genuinely reached the claimed stage and that construction claims reconcile against the approved design, not just against site progress.
More than ever. Under AS 4902 the contractor controls design, programme and construction — the principal’s visibility shrinks to what the contract machinery provides: the superintendent’s reviews, assessments and certificates. Without one, the principal is effectively unrepresented inside a contract where the other party holds most of the information.
AS 4000 assumes one: the contract’s payment, variation, extension of time and certification machinery all run through the superintendent. If no superintendent is appointed, those functions still have to be performed by someone — usually the principal, against a contractor who administers contracts for a living.
It can be, but the superintendent must still act honestly and fairly when certifying, and an in-house appointment makes that independence harder to demonstrate. An external superintendent gives the certification independence that stands up in a dispute.