Which type of contract is the most common for architectural design services?

The most common type of contract for architectural design services is the Design Agreement for Engineering and Design Services (DAEDS). This type of contract is typically used to define the relationship between the client and the architect or engineering firm, outlining the scope of work, fees, responsibilities, and other important legal terms necessary for the business arrangement.

In architectural projects, the DAEDS format allows for flexibility in adjusting project details while still providing a clear framework for project delivery. It facilitates an understanding of expectations from both parties, which is crucial in ensuring successful project management and outcomes.

The other types of contracts mentioned serve different purposes or contexts. Fixed Price Contracts, while also common in contracting, may not suit the variable nature of architectural design work, which often involves adjustments and iterations. Unit Cost Contracts are typically used for construction projects where work is defined in measurable quantities, rather than design services. DADS does not represent a common contractual standard, making DAEDS the most appropriate choice for architectural design services.