This November, the residents of the City of San Francisco will either approve or disapprove a ballot measure that will double city transfer taxes on residential and commercial sales over $10 million. Real estate investors need to be cognizant of this potential tax increase in drafting their purchase and sale agreements, leases, and other real estate documents. If it passes, the amended transfer tax ordinance will become operative on January 1, 2021....By: Allen Matkins.