Senate Bill 142, had it become law, could have dealt a blow not only to hobbyists but to the aspirations of companies like Amazon.com that are aiming to make deliveries using drones.
The requirement to ask permission from property owners to fly below 350 feet would have forced companies to ask for permission from neighbors before making a delivery to a particular location.
In a message late Wednesday, Brown wrote to the members of the state senate that the issue had to be looked into more carefully. The bill as drafted, however well-intentioned, could "expose the occasional hobbyist and the FAA-approved commercial user alike to burdensome litigation and new causes of action."
The bill would have introduced trespass liability even if privacy was not violated, Brown added.
State Senator Hannah-Beth Jackson, a Democrat from Santa Barbara who introduced the bill, says drones raise privacy issues, despite their obvious benefits. The bill extended current rules pertaining to trespassing on private property to remotely operated aerial vehicles, according to Jackson.
The Federal Aviation Administration limits the flying of drones by hobbyists to a maximum of 400 feet. The 350 foot minimum altitude requirement of the proposed California law would have then limited hobbyists to a corridor of 50 feet.
Rules proposed by the FAA for commercial uses of drones limit the altitude drones can fly to 500 feet.
Some states have, however, have pushed ahead with their own legislation on various aspects of drones. In 2015, 45 states have considered 156 bills related to drones, according to data from the National Conference of State Legislatures.
Before Governor Brown for consideration are two other bills that place restrictions on flying of drones over prisons or county jails and schools in the state.
Trade association Consumer Electronics Association welcomed the veto. "While we agree issues of privacy and drones should be addressed, this legislation was the wrong approach," CEA president and CEO Gary Shapiro said in a statement. Safe and responsible drone use will transform the way people do business, he added.