Team work is intricate in Barbara and Robert's superior level of service to their clients.

David Ayerdi has assisted Barbara Callan and Robert Callan Jr. with close to $1.5 Billion Dollars in residential real estate transactions in San Francisco since 2002. David continues to work with Barbara Callan, and Robert Callan Jr., McGuire’s #1 Team Company-Wide for 2016, 2015, 2014 and 2013. David began his career at McGuire Real Estate in 2000 by assisting the legendary real estate icon Florian McGuire Moore.

David enjoys working with sellers and buyers at all price levels and works tirelessly on their behalf. Extremely upbeat, a great negotiator, stellar listener and his savvy real estate skills will make the selling and buying transition an easy one. David is available 24/7 for his clients!

A first generation native San Franciscan, David was born in the Potrero Hill neighborhood and has lived in this amazing City his entire life. David resides in the Castro neighborhood in San Francisco. David has bought and sold many homes, condominiums and income buildings in San Francisco over the years and is a proud homeowner and landlord of multiple properties in San Francisco. David reads, writes and speaks Spanish fluently and is a graduate of the University of California at Berkeley with honors. David holds dual citizenship with the USA and Colombia.

David is a member of the San Francisco Association of Realtors (SFAR), California Association of Realtors (CAR) and National Association of Realtors (NAR).

Barbara’s daughter Regina Callan is an interior designer in San Francisco and a developer who designs some of the most spectacular homes all over the City including Pacific Heights, Presidio Heights and the Marina District.  Regina’s most recent project was a 5,000 square foot premiere design showpiece home and selected as Elle Décor’s 1st Showcase Home.