In San Francisco, where new developments are as rare as affordable housing, the lack of land and high cost of building continue to make the market even tighter. “Right now, there are very few new development/construction units available in the market based on historical numbers,” said Krysen Heathwood, senior managing director, Western region, Compass Development Marketing Group. “Additionally, there are no new developments coming out of the ground. Therefore, there will be a dearth of inventory in the coming years.”