Once land is secured and a townhouse development starts moving from concept to delivery, one of the most consequential decisions a developer makes is which contract model to use. The choice between a design and construct (D&C) contract and a traditional contract shapes who carries risk, how much design control the developer retains, and how the project is priced and delivered. Neither model is universally better — the right choice depends on what you value most for a given project.
What a Design and Construct Contract Involves
Under a D&C contract, a single contractor takes responsibility for both the design and the construction of the project, working from the developer’s project requirements. Once those requirements are set, the contractor manages the detailed design, documentation and construction as one integrated process. This structure transfers a significant amount of design and construction risk to the contractor, in exchange for greater cost and programme certainty for the developer.
What a Traditional Contract Involves
In a traditional delivery model, the developer engages an architect or designer to produce complete plans and specifications first. Builders then tender against that finished design, and the developer selects a contractor to construct the project as documented. This model gives the developer more control over design decisions throughout, but it also means the developer carries more of the risk if the design and construction phases don’t align smoothly.
Where a D&C Model Tends to Work Well
Developers who value price and programme certainty over granular design control often prefer a D&C arrangement. Because one contractor is accountable for design and construction together, there is less risk of disputes between architect and builder over buildability, and fewer surprises once construction begins. This can suit developers running multiple projects at once, where certainty and reduced administrative load matter more than shaping every design detail personally.
Where a Traditional Model Tends to Work Well
A traditional contract suits developers who want closer involvement in design decisions, or who are working with a design team they already trust and want to keep separate from the builder relationship. It also allows for more genuine price competition at tender stage, because builders are pricing an already-completed design rather than absorbing design risk into their number. The trade-off is that the developer, not the contractor, typically absorbs more of the risk if design and construction don’t line up as expected.
Contract Scale Matters
The right contract model is also a question of project scale and value. A heavily amended, formal D&C contract can be excessive for a small subdivision, while an under-documented arrangement can leave a large, multi-stage townhouse development exposed. For sizeable developments, builders will generally expect a recognised Australian Standard form of contract, appropriately amended for the project. Matching the contract’s formality to the project’s scale avoids both unnecessary friction and unnecessary risk.
Questions to Work Through Before Choosing
- How much design control do you want to retain personally, versus delegate to the builder?
- Is price and programme certainty more valuable to you than design flexibility on this project?
- Does your design team have an existing relationship with builders you’re considering, or would a D&C model consolidate that risk?
- What is the scale and value of this project, and does that support a heavily amended contract or a simpler one?
- How experienced is your chosen contractor in managing the model you’re leaning toward?
The Builder’s Role Either Way
Whichever model a developer chooses, the quality of the builder behind it matters more than the contract type on its own. A capable builder operating under a D&C model still needs the design judgement to deliver a genuinely buildable outcome, not just a compliant one. A capable builder operating under a traditional contract still needs to flag design issues early, rather than building exactly as documented even where a problem is obvious. The contract sets the framework; the builder’s experience determines how well that framework performs in practice.
A Hybrid Approach Is Sometimes Worth Considering
Some developers land on an approach that borrows from both models: engaging a design team early to establish the core architectural and planning intent, then innovating that design relationship to the builder once a D&C-style contract is signed, so the builder takes on responsibility for detailed documentation and construction while the original design vision is preserved. This can offer a useful middle ground for developers who want design certainty early but still value the price and programme certainty a D&C structure provides. It does, however, require careful drafting around novation terms, so it’s worth discussing with your legal advisor alongside your builder before committing to this structure.
Getting Advice Before You Decide
Because the contract model shapes risk allocation for the entire life of a project, it’s worth discussing the options with your legal advisor and your preferred builder before finalising a design brief or going to tender. A conversation at this early stage, rather than after tender documents are already prepared, gives you the flexibility to structure the project the way that best suits your priorities.
At Groove Properties, we work with developers under both delivery models across townhouse and multi-residential projects in Brisbane and South East Queensland, and we can talk through which structure suits your site, your design team and your appetite for risk. Our project management approach applies the same rigour and value management regardless of contract type, and our residential portfolio reflects projects delivered under both models.
If you’re weighing up contract structures for an upcoming development, we’re happy to talk through the practical implications for your specific project.
