San Francisco Investment Sales Team

Our Team

Tony Crossley
Executive Vice President
San Francisco

Tony Crossley specializes in the sale of downtown San Francisco commercial properties and development land.  Tony has been with Colliers International for the past 23 years and has been a downtown San Francisco investment specialist for the past 33 years.

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Tim Maas
Executive Vice President
San Francisco

Tim Maas, Executive Vice President, has been directly involved in the sale of commercial buildings in downtown San Francisco since 1986.  

Tim’s primary focus is in the sale of investment transactions in the San Francisco Bay Area.  He joined Colliers International in 2003 after having spent the previous 13 years with GVA Whitney Cressman as head of its investment division and national practice.  He is a member of Colliers Asset Resolutions Team (“CART”), an affiliation of 200 Colliers International investment and leasing professionals representing the trillion dollar CMBS market.  

In his 27 year career, Tim has represented landlords on more than three million square feet of agency assignments and has sold over 300 commercial properties for a value exceeding $3 Billion.  Clients have included private investors, family trusts, REITS, institutional investors, and corporations.

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Frank Wheeler
Executive Vice President
San Francisco

With 35 years of commercial real estate brokerage experience in San Francisco, Frank is consistently one of Colliers International’s top Investment brokers.

His sales expertise includes the adaptive re-use of land and commercial properties in San Francisco’s diverse South of Market (“SOMA”) neighborhood, wherein Frank has considerable knowledge of the myriad of zoning and land use issues that affect property value and developability.  He has participated in over 350 transactions with an aggregate value of $2.7 billion.

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Darren Kuiper
Vice President
San Francisco

Darren’s primary focus is on the analysis, underwriting, marketing and sale of commercial properties and residential and office development land in downtown San Francisco.

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William Cliff
San Francisco

Will started his commercial real estate career in 2012, and joined the Colliers International San Francisco Investment Services Group in March 2016.  Focusing on existing commercial properties and development sites, his responsibilities include underwriting, due diligence management, and market analysis.

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Committed to accelerating success.
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Notable Recent Transactions

  • The Hamm’s Building @ 1550 Bryant | San Francisco | 185,000 SF Creative Office
  • 1660 & 1680 Mission | San Francisco | 112,000 SF Value-Add Office
  • 1 Daniel Burnham Court | San Francisco | 97,000 SF Medical Office
  • 1161 Mission | San Francisco | 67,000 SF Creative Office
  • 1035 Howard | San Francisco | 62,000 SF PDR/Office
  • 1098 Harrison | San Francisco | 42,000 SF Creative Office
  • 290 Division | San Francisco | 36,000 SF PDR/Office
  • 220 Post | San Francisco | High-Street Retail
  • Bosa Retail Portfolio | San Francisco | 5-Unit Commercial Condos
  • Sam’s Anchor Café @ 37 Main Street | Tiburon | Iconic Waterfront Restaurant & Bar
  • 33 Powell | San Francisco | 142 Key Boutique Hotel + High-Street Retail
  • The Potrero Power Plant | San Francisco | 21 Acre Waterfront Development Site
  • Mission Bay – Block 1 | San Francisco | 350 Unit Condo Site
  • The Goodwill Site | San Francisco | High-Rise Mixed-Use Development Site
  • 100 Hooper | San Francisco | 427,000 SF Office/PDR Development Site
  • 525 Harrison | San Francisco | 205 Unit Residential Site
  • 1301 16th | San Francisco | 172 Unit Apartment Site
  • 360 5th | San Francisco | 127 Unit Apartment Site
  • 99 Rausch | San Francisco | 112 Unit Condo Site
  • 2301 Lombard | San Francisco | 22 Unit Residential Site
  • 816 Folsom | San Francisco | 202 Key Hotel Site
  • 1401 Illinois | San Francisco | 225,000 SF PDR Development Site


Exceptional Knowledge
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We offer our clients expertise in the following market segments:


  • Office
  • Industrial (PDR)
  • Retail
  • Parking Garages
  • Hotel
  • Commercial Condos


  • Residential
  • Office
  • Hotel
  • Retail
  • Mixed-Use


Global Reach
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Colliers International is a leader in global real estate services, defined by a spirit of enterprise. Through a culture of service excellence and a shared sense of initiative, Colliers integrates the resources of real estate specialists worldwide to accelerate the success of its partners.

We act as a strategic partner, we build an investor profile of opportunities then model projected performance to determine value.
Our valuation team bring fast, accurate, well-supported underwriting to justify property values.
We evaluate property values and increase return on investment.
Our strategy is twofold: meeting your sale objectives and targeted marketing.
Featured properties

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