San Francisco, CA – November 28, 2011 – (RealEstateRama) — Last spring, Oliver Burgelman, Realtor with Zephyr Real Estate, developed a new market-tracking website tool called PriceSquares.com. The site originally covered properties in San Francisco, but the demand for expansion quickly became apparent, particularly for the North Bay. Consequently, the site now includes Marin, Napa, Sonoma, Solano and Mendocino counties. The site also has undergone some visual changes for a cleaner and more user-friendly interface.