definition
strict definition
construction
Companies and firms involved in the physical work of building and altering structures.
A construction firm is any company which executes the actual construction, renovation, or additions of a structure. It is generally hired by the owner, developer, manager, or another contractor.
The company performs the physical work of construction, including renovation or an addition. It can be hired directly by a project owner or through another contractor.
Design and engineering concern planning and technical services. Performing those services alone is distinct from executing the physical building work.