The CETA has five sub-sectors within the construction industry, all defining different activities within the sector. Various stakeholders are classified under these sub-subsectors due to the nature of the work they do within construction.

Building Construction
This is the largest sub-sector in the construction sector. It includes all contractors i.e. civil engineering contractors, steel, structural, mechanical contractors, residential and non-residential contractors. 

Roads and Civil Construction
This sub-sector includes all activities that pertain to the construction of buildings but are outside the category defined under Building Construction. This includes construction, maintenance and repair of roads, runways, bridges, tunnels and related structures including draining and road services.

Built Environment Profession
This sub-sector includes architects, engineers, quantity surveyors, landscape architects, land surveyors, town and regional planners; property valuers, project and construction managers. This group is made up of the professionals governed by the Built Environment Professions Act. 

Materials Manufacturing
Activities include manufacturing of various wooden fixtures, tiles, sanitary ware, ceramic products, concrete and cement products, tombstones, and roof trusses. 

The construction sector is extensive, with diverse activities including construction, maintenance, renovation or replacement of fixed assets of a variety of magnitude. The sector is made up of four broad sub-sectors; materials manufacturing, construction, building, and the built environment professions. Each sub-sector covers a different aspect of the industry.

Electrical Construction  
The Sub-sector deals with the assembling, installing and wiring  of the electrical system in new homes and buildings. This sector deals with installation of electrical equipment and signal communication system.