Bill Viola

INTERIORS SPECIALIST Founded in 2003 by a group with a vision to change the construction industry and a combined 150 years of experience, we are a Bay Area general contractor specializing in tenant improvements. Located in San Francisco, our Fortune 1000 customers range from financial and law firms to technology, advertising, and health & wellness businesses. Principal Builders is known for building long-term relationships, foreseeing problems before they happen, radical transparency with customers, and access to a network of craftsmen and subcontractors at the highest level of workmanship and reliability. Voted as one of the Bay Area’s Fastest Growing Companies and One of the Best Places to Work in the Bay Area over the past 20 years, we attract and retain the industry’s best and brightest teams and specialists.