Planning & Design
Builder vs Design-and-Build Contractor: What's the Difference?
Traditional procurement or design-and-build? How each route works and which may suit your project.
MJM Joinery & Building ·
There are two common ways to procure a substantial residential project. Understanding the difference helps you choose the right route — and the right team.
The traditional route
In the traditional route, you appoint an architect or designer first. They develop the design, obtain planning permission and the building warrant, and prepare drawings and a specification. Builders are then invited to price the work, and you appoint a contractor to build it.
Advantages
- You have independent design advice throughout
- Contractors price the same information, which makes proposals easier to compare
- Your architect can often help inspect the work during construction, depending on their appointment
Considerations
- Design and construction happen sequentially, which can take longer overall
- Buildability and cost input from the builder come later in the process
Design-and-build
In design-and-build, one organisation takes responsibility for both the design and the construction. The design may be produced in-house or by consultants the contractor appoints.
Advantages
- A single point of responsibility
- Construction knowledge informs the design from the start
- It can be quicker to move from idea to site
Considerations
- You have less independent design oversight
- It can be harder to compare proposals because the design is part of what is being offered
A practical middle ground
Many homeowners choose a combination: they appoint their own architect for the design and consents, then involve a contractor early to advise on buildability, cost and programme before the design is finalised. This brings construction knowledge into the process while keeping independent design advice.
How MJM works
We work alongside your architect or designer, or introduce trusted professionals where needed. We are happy to be involved early, to review drawings for buildability and cost, and then to manage the construction with one point of responsibility.
Which is right for you?
Consider how involved you want to be, how complex the project is, and whether independent design advice matters to you. For most substantial projects, the quality of the team matters more than the procurement route itself.
Read more about how we work or start your project.
