Contractor profiles
- Charles Morden Construction
- Chrétien Excavation Inc. – Sylvain Chrétien
- Claramy Designs Incorporated O/A LSK Septic and Drain
- Clarington Septic Repair
- Clear Line Site Solutions
- ClearFlow Inc.
- Clearford Water Systems
- Clearlite Excavating
- Cliftondale Construction Co.
- Clover Luxury Portables
- CMT Engineering Inc.
- Coalwater Excavation Inc. – Carl Charbonneau
- Cobide Engineering Inc.
- Coiron Ottawa Excavating
- Colron Excavating
- Colron Ottawa Excavating – Paul Saffioti or Jordan Walker
- Compass Resorts
- Concrete Precasters Association of Ontario
- Coon’s Cartage & Excavation – Maynard Coons
- Cooney Construction & Landscaping Ltd.
- Cooney Excavating Ltd.
- CopperWood General Contracting Inc
- Core Earthworks Limited
- Cottage Septic & Plumbing Services Inc
- Coulson Bros Scow Service
- Countryside Excavation Inc
- County of Lambton
- County of Prince Edward
- Cousins and Johnson Inc
- Creation Homes – Nicholas Simard
- Cromar Environmental
- Crozier Consulting Engineers
- CS Enterprise Inc
- Current Septics
- D.F.Post Contracting Inc.
- Dal Hastings Haulage & Ex. Inc.
- Dan Parr Septic Services
- Danfoss
- Darryl M. Robins Consulting Inc.
- Dave Dobinson Excavating Inc