Benefits of design & build
You only have one contract and one point of contact to liaise with.
Better teamwork ensures more accurate cost and time estimates. A guaranteed maximum price can be established early on.
Sub-contractor pricing remains competitive.
Professional fees associated with construction administration are lower.
Clear communication between designers and builders prevents up-charges related to change orders.
You can save costs on construction since the designer will take cost-efficiency into consideration when drawing plans.
Your project is much more likely to be completed on time.