Special Construction deals with specialty subsystems. Items usually associated with this division can range from air-supported and pre-engineered structures to darkrooms.

The procedure for estimating this division starts with reading and reviewing the specifications. Usually if a Special Construction item is required, there will be some text about it in the specifications. The plans, as well as any other related construction document, should be thoroughly studied when Special Construction items are involved because they can contain important information.

Usually the items included in this division are purchased as a whole, complete, installed assembly, rather than installed in parts by one or more subcontractors. In many cases Special Construction systems are bought and installed by the owner. In some cases, the owner may purchase the unit and will have the contractor be responsible for the installation. In this case, the labor must be added to the overall estimate.