In February 2015, Coonerty and fellow supervisor Bruce McPherson wrote new regulations designed to incentivize small and affordable housing by requiring construction projects to pay higher fees into a fund providing grants for affordable housing as well as more funding for childcare facilities. In June 2015, Coonerty wrote a letter subsequently approved by the Board of Supervisors requesting the county withdraw investments from banks that have pleaded guilty to committing felonies, an initiative that won praise from Robert Reich. Coonerty led the effort to establish a local Nurse-Family Partnership Program and a Thrive by Three Fund to support families' health and educational outcomes.