| Cambridge | 4 Bees | Siding | Condo |
| Cambridge | PJ Interprize | Sider | Condo |
| Cambridge Inn (Best Western) | | Hotel |
| Cambridge Inn-New Addition | Northgate Hotels | New addition | Hotel |
| Cameron County | Landmark Organization | | |
| Cameray Condos | Bellows Construction | Deck Wateproofing | Condo |
| Cameray Condos | America First Roofing | Roof | Condos |
| Campbell Residence | SC Construction | Sider | Single Family |
| Canyon Ridge | 4 Bee's Siding | Sider | Sider |
| Capital on the Green | Zimmer | Siding Condo | Apartments |
| Caras Residence | | General Condition | Single Family |
| Carillon | Eastside Sealants | Sealant Applicator | Condo |
| Carrara II | Stark Construction | Framer | Condo |
| Centerpointe Apartments | Pacifica Companies | | Apts |
| Centerpointe Apts-Conversion | Pacifica Companies | | Apts |
| Chelsea Courte | Pearson & Assoc | Project Manager | Condo |
| Cherry Lane Townhomes | Lotus Enterprises | Framer | Condo |
| Cherrywood | Giard Construction | | Condo |
| Cheswick Lane Condo | Danny Kim / Int'l Bldg Assoc | | Condo |
| Cheswick Lane Condo | JJ Plumbing | Plumber | Condo |
| Christiansen Condo | Evergreen Siding | Sider | Condo |
| Churchill Residence | N Willamette Valley Const | | Single Family |
| Claridge | Model Contractors | Framer Condo | Condo |
| Clark (Ken) | Allaway Cosntruction | General Contractor | Single Family |
| Clark (Joe) | Sunshine Construction | General Contractor | Single Family |
| Clemmens (Katherine) | | Personal Injury | |
| Club 1201 (Orenco Station) | Carmona Painting | | |
| Club 1201 (Orenco Station) | Belanger General Contracting | Sider | Condo |
| Club 1201 (Orenco Station) | Evans Construction Siding | Sider | Condo |
| College Glen Apartments | Livingston Continous Gutters | GC Single Family | Apartments |
| Columbia Village Apts | Quinn Construction | Fire (Sider) | Apartments |
| Coker Floating Home | Personal | | Single Family |
| Compass Pointe | JDL Services | Sider | Condo |
| Community Action Org | Capp Heating & Sheet Metal | | Condo |
| Conner | Cedar Creek Homes | General Contractor | Single Family |
| Copper Ridge | R&E Enterprises | Framer Single Family | Condo |
| Copper Ridge | Framers Co-op | | Condo |
| Cornerstone | 4 Bees Sider | Sider | Apartments |
| Cornerstone | Abco Roofing | Roofing | Apartments |
| Corta Madera | Bear Creek Masonry | | Condo |
| Cottages @ Highlands East | HOA | | Single Family |
| Cresline NW | Maxson Const | Roofing Condo | Condo |
| Crocker | Schisel Cosntruction | General Contractor | Single Family |
| Crown Pacific Properties | Oliver Apts-Conversion | | Apartments |
| Crown Pacific Properties | Mosaic Apts-Conversion | | Apartments |
| Crown Pacific Properties | Jeffrey on First Hill-Convesion | Apartments |
| CSM Property Apartments | Polygon Northwest Company | | Apartments |
| Cummings | State Roofing | Roofing | Single Family |
| Cypress Way v. Threefold | Helsell Fetterman | Consulting | Condo |
