What Does a Design Cover in a Design and Construct Agreement? Your Guide to Commercial Contracts

Design and construct (D&C) contracts have transformed the way businesses approach commercial property projects in Australia. If you’re planning to build or renovate a space for your business, these agreements are likely to come up. But amidst the excitement, one key question often leaves business owners scratching their heads:

What does “the design” actually cover in a design and construct agreement?

Getting this right is absolutely crucial. A clear understanding of what the design includes-and what it doesn’t-can be the difference between a successful, headache-free project and a costly dispute down the track. Whether you’re new to D&C or want to make sure your next project goes smoothly, this guide will help you understand what a design really means in your contract and how to protect your business interests every step of the way.

Let’s dive in and demystify this essential part of commercial contracts-so you can build your dream business premises with total confidence.

What Is a Design and Construct Agreement?

Before we jump into what a design covers, let’s clarify what a design and construct agreement is. In Australia, design and construct (D&C) is a popular contract model for commercial construction, where the same contractor is responsible for both designing and building your project. Instead of hiring an architect separately, you work with a single entity from concept drawings to a finished building.

This can simplify project management, help control costs, and reduce finger-pointing if issues come up, since one party takes on end-to-end responsibility. But also-without clear details about what “the design” includes, there’s room for confusion or disputes about expectations, inclusions, and quality.

What Does “Design” Cover in Commercial D&C Contracts?

The design component can sometimes be a grey area for business owners. Does it mean architectural plans only? What about engineering, finishes, or choosing fixtures and fittings? Here’s what you need to know:

1. Architectural Design

This is usually the heart of the design package. It covers floor plans, layout, spatial design, and the look and feel of your building. If your D&C contract mentions “design,” architectural drawings and specs should be included as a minimum.

2. Engineering Designs

Most D&C projects require various types of engineering, including structural (the building’s framework), mechanical (air conditioning and ventilation), electrical (lighting, outlets), hydraulic (plumbing), and sometimes fire engineering. The contract should spell out which elements are included in the design phase, and who is responsible for compliance with Australian building standards.

3. Specifications and Finishes

Deciding on floor coverings, wall finishes, cabinetry, and joinery is a big part of what makes your project unique (and functional). In a well-prepared D&C contract, these choices ideally form part of the design, and are often detailed in a “specifications schedule” or similar attachment. If finishes and material choices are still to be decided, your contract should clearly indicate how and when these will be selected, and who makes the decision.

4. Approvals, Permits, and Compliance

The design process also covers ensuring the building complies with planning regulations, National Construction Code (NCC) requirements, accessibility standards, and council zoning rules or permits. Make sure your D&C agreement clearly allocates responsibility for obtaining approvals-misunderstandings here can lead to costly delays.

5. Specialist Designs

If your business has special requirements (like a commercial kitchen, medical fit-out, or high-tech laboratories), “the design” may need to include input from specialist consultants. Again, check your contract: Are these elements explicitly included? Are they provisional, or is the contractor expecting you to engage separate consultants to handle specialist aspects?

6. Fit-Out and Furniture

Some D&C agreements (especially for retail or offices) include interior design, fit-out, and even furniture procurement. Others do not. The scope of works section of your contract should specify the finish point-does “handover” mean the building is ready for operation, or will you still need to install fit-out elements yourself?

How Specific Does “Design” Need to Be? (Why Clarity Matters)

It’s easy to assume that “design” is a catch-all for everything your project needs, but the legal reality is: if it’s not written in the contract, it may not be included.

• Vague design scope: Can result in disputes, variation claims, or even incomplete projects.
• Clear design brief: Ensures everyone understands what’s included (and what isn’t), and reduces the chance of budget blowouts.

As a business owner, always insist on a detailed design scope in your D&C agreement. This should list:

• All design deliverables (e.g. architectural drawings, engineering plans, specifications schedules)
• Who is responsible for each component (contractor, consultant, or you?)
• Timelines and milestones (when does each design stage need to be complete?)
• How changes or upgrades will be managed (so you’re not surprised by additional costs)

If you’re unfamiliar with construction contracts, getting a legal expert to review your agreement is a smart investment-especially before you sign anything.

What Are the Stages of Design in a D&C Contract?

It’s helpful to think of “the design” as a staged process, not a single document. Most commercial D&C projects progress through phases that might include:

• Concept Designs: Outline big-picture ideas and site layout
• Design Development: Expands the concept into more detailed plans, including material selections
• Detailed Construction Drawings: Highly technical documents contractors use to build
• “For Construction” or “Issued for Construction” Drawings: Final set used for approvals and on-site work
• As-Built Drawings: Prepared at the end, reflecting what was actually constructed (useful for maintenance and future renovations)

Your D&C agreement should make clear which of these stages are included, and at what level of detail. For example, are furniture layout diagrams or lighting designs part of the deal? Don’t leave it to chance.

How Do Design Variations and Changes Work?

It’s common for design details to change during a build-sometimes due to compliance needs or client preferences. Variation clauses in your contract determine how design changes are managed, approved, and priced.

Ask yourself:

• Do you have the right to request design changes? At what stages?
• How are increases in cost or time handled if you upgrade materials or change the layout?
• Is there a clear process for raising and approving variations? (Ideally, variations must be agreed in writing before work proceeds.)

Making amendments to contracts is a complex area-understanding it up front helps avoid post-contract headaches.

Legal Compliance: Are There Any Laws I Need to Consider?

Yes, there are several legal considerations that can affect what your design covers-and your obligations as a business owner or tenant:

Construction and Planning Laws

Australian building projects must comply with local council planning rules, the National Construction Code, and various safety standards. Your contract should specify whose responsibility it is to ensure designs meet code-don’t assume your builder is covering everything unless it’s spelled out.

Australian Consumer Law (ACL)

Businesses commissioning construction work are protected by the Australian Consumer Law, particularly around guarantees for the quality and suitability of services. If you’re delivering projects for end-users, you should also be aware of your obligations here. Read more about consumer guarantees.

Licences and Permits

You (or your contractor) may need specific building or occupation permits, zoning approvals, and other certificates before construction can begin or your business can occupy the premises. If “obtaining permits” isn’t listed in the design scope or contract, clarify who’s responsible.

Intellectual Property Rights

Architectural designs, drawings, and even renders may be protected by copyright. Make sure your agreement sets out who owns the intellectual property in the design-often, you’ll want to secure rights to use the plans for future stages or branding, which might require an IP assignment agreement.

Insurance and Risk

Design errors can be costly, so contractors generally carry professional indemnity insurance. Still, your contract should specify risk allocation-if a design fault is discovered, who is responsible for rectification and costs?

What Legal Documents Will I Need for a D&C Project?

A D&C project is a significant business commitment. To protect your interests, several contracts and documents should be in place:

• Design and Construct Agreement: The main contract outlining the project scope, responsibilities, timings, pricing, and risk allocation.
• Scope of Works: A detailed attachment describing exactly what’s included in the design and in the build (and what isn’t). Every design element, finish, or feature should be itemised.
• Variation Register: Tracks any changes to the agreed design, costs, or timeline, with sign-off required for each.
• Consultant Agreements (if relevant): If you’re engaging consultants (e.g., landscape, kitchen, or specialist engineers) directly, you’ll need separate consulting agreements.
• Intellectual Property Agreement: Ensures you can use the designs for intended purposes, now and into the future.
• Deed of Assignment or Novation (if changing contractors): Protects rights if the contractor changes or sells the contract.

Not all businesses will need every contract, but most will need several. If you’re unsure, seeking guidance from a contract lawyer early on can prevent costly oversights.

Should I Use a Template Design and Construct Contract?

It might be tempting to download a free contract template and fill in the blanks, but for most D&C projects, a customised agreement is safer and smarter. Why?

• Templates may not cover the unique requirements of your business or site.
• Legal and compliance standards differ between states and project types.
• If anything is ambiguous or missing, you might be left with gaps in protection.
• Professional review ensures key risks are managed from the start.

A tailored agreement, developed with legal input, is much more likely to get your project off to a smooth and secure start.

Alternative Paths: What If I Only Need a Fit-Out?

Not every business project involves a full design and construct contract. In some cases (like retail or hospitality fit-outs), you may only need a fit-out contract or agreement for minor works inside an existing space.

The legal steps are similar: specify the scope, confirm compliance, clarify who obtains approvals, and put robust contracts in place. The principles around what a design covers are just as important.

Can Two Businesses Have the Same Design?

If you’re using a standardised design provided by a developer, or operating a franchise, it’s possible other businesses will have similar (or the same) designs. This isn’t necessarily a problem, but:

• Check for intellectual property restrictions
• Ensure your agreement allows you to use the design as needed-don’t assume unlimited rights if it isn’t in writing

If branding or exclusivity is important for your business, discuss this up front with your contractor or franchisor, and get written confirmation wherever possible.

Key Takeaways

• “What a design covers” in a design and construct agreement is crucial for avoiding misunderstandings, disputes, or budget blowouts.
• Good D&C contracts clearly detail every aspect of design-architectural, engineering, finishes, compliance, and any specialist input.
• Insist on a detailed scope of works and consider legal review before signing any agreement.
• Variation clauses should clarify how changes to design will be managed, priced, and approved.
• Don’t assume anything-if a design element or approval is important to you, make sure it’s written in the contract.
• Get the right legal documents in place-this may include bespoke D&C agreements, consultant contracts, and intellectual property clauses.
• Expert advice early in your project can prevent costly mistakes and protect your business as you build or expand.

If you’d like a consultation on what a design covers in your commercial contract or guidance on your next design and construct project, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.