925.891.4220

CA CONT LICENSE # 977589


Three words come to mind to describe Trinity Devco Inc.: Design / Builder / Owner.  You see we at Trinity strive to partner with our customers.  Whether contracted as Design Build Team, or Builder for Owner, or in Partnership with others, we offer no surprises and the ability to build it right the first time.

Trinity has a proven track record in Upper Project Management, and Project Supervision from Land Acquisition, Forward Planning with Project Entitlements, and Land Development through Home or Multi Family Development.  Complete Project Development while maintaining a high proficiency in all computer applications with complete and accurate systems of Construction Documentation.

All large or small Trinity projects can include the Design/Build agreement. Trinity works well with selected Architects for Design Build Projects.


Custom Home / Estate Home Development Atherton CA
Commercial  Ahterton CA
Multi-Family Atherton CA
Single Family Atherton CA
Civil Construction Atherton CA
Large Remodel / Room Addition Atherton CA
In-House Trinity Crewman Atherton CA
Design Build Atherton CA
Consultant Services Atherton CA
Project Development Atherton CA
Construction Documents Atherton CA

Since 1999 Trinity Devco founded by Jim  Slevin  has built Apartment Complexes, High End Custom Homes in Atherton CA, Production Housing, Commercial Construction, Production Land Development, Home or Multi-Family Restoration along with numerous smaller contracts including Home Remodel, Room Additions and Commercial Tenant Improvements in the Atherton CA, & Surrounding San Francisco area.