Appraisal Institute

BOMA – Building Owners and Managers Association International

BREA – Bureau of Real Estate Appraisers California

CAR – California Association of Realtors

CBRE

Colliers International

CoStar

Cushman & Wakefield

DRE – Department of Real Estate California

IREM – Institute of Real Estate Management

LoopNet

Marcus & Millichap

Proven Partners

 Real Estate Market Trends Reports

Reis Reports

TRI Commercial

Trulia

Zillow