Which contract type is best suited for projects with unclear specifications?

The most suitable contract type for projects with unclear specifications is the unit price contract. This type of contract allows for payment based on the quantity of work performed, rather than a fixed total price upfront. This flexibility is particularly advantageous when the specifics of the project are not fully defined, as it enables the parties involved to adapt to changes in scope or unforeseen circumstances without needing to renegotiate the entire contract.

The unit price approach lets the contractor bill for what is actually completed, which can be beneficial in managing costs as the project evolves and clarifications of specifications come to light. Thus, it aligns well with projects where scope and specifications may need to be refined throughout the course of the work.

On the other hand, contracts such as the cost plus percentage or guaranteed maximum price may impose burdensome limitations or financial risks where clarity of scope is lacking. The design-build contract, while beneficial for streamlined project delivery, often assumes a more defined project trajectory, making it less ideal when specifications are uncertain.