As construction manager, Nasco provides extensive pre-construction services during the design phase as required by the contract with the owner, and transitions into construction-phase management that includes most aspects of general contracting except often limiting self-performance to 3% or less.

In construction management, the contract structure between owner and architect and contractor are similar to general contracting, but the contractor is involved earlier in the project,  providing pre-construction services during the design phase, and leading the trade bidding process when construction documents are complete. There are several contract types applicable to this client-contractor relationship including lump sum and maximum guaranteed cost plus fee.