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AIA/CSI MasterFormat Divisions

Search 2,300+ Chicagoland contractors by CSI MasterFormat division. Div 26 = Electrical, Div 23 = HVAC, Div 22 = Plumbing, and more.

Div 01
General Requirements
7 contractors
Div 02
Site Construction
101 contractors
Div 03
Concrete
Coming soon
Div 04
Masonry
Coming soon
Div 05
Metals
Coming soon
Div 06
Wood & Plastics
135 contractors
Div 07
Thermal & Moisture Protection
1 contractors
Div 08
Doors & Windows
Coming soon
Div 09
Finishes
Coming soon
Div 10
Specialties
Coming soon
Div 11
Equipment
Coming soon
Div 12
Furnishings
Coming soon
Div 13
Special Construction
Coming soon
Div 14
Conveying Systems
Coming soon
Div 21
Fire Suppression
4 contractors
Div 22
Plumbing
15 contractors
Div 23
HVAC
195 contractors
Div 25
Integrated Automation
Coming soon
Div 26
Electrical
144 contractors
Div 27
Communications
Coming soon
Div 28
Electronic Safety & Security
Coming soon
Div 31
Earthwork
101 contractors
Div 32
Exterior Improvements
Coming soon
Div 33
Utilities
113 contractors
Div 34
Transportation
Coming soon
Div 35
Waterway & Marine
Coming soon
Div 40
Process Integration
Coming soon
Div 41
Material Handling
Coming soon
Div 42
Process Heating & Cooling
Coming soon
Div 43
Process Gas & Liquid Handling
Coming soon
Div 44
Pollution Control
Coming soon
Div 45
Industry-Specific Manufacturing
Coming soon
Div 46
Water & Wastewater
Coming soon
Div 48
Electrical Power Generation
144 contractors
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