GREENBRAE -- The Marin Healthcare District on Tuesday voted unanimously to put a general obligation bond totaling $394 million on this November's ballot, which would help finance the approximately $500 million rebuild of Marin General Hospital.

The hospital must rebuild in order to meet state-mandated seismic requirements. Earlier this year, the hospital asked for and received an extension on its deadline and now has until 2030 to finish the project.

The measure will need a two-thirds majority from voters in the health care district's service area, which includes all of Marin County except Novato and portions of West Marin.  If passed, the tax would amount to roughly $20 per $100,000 of assessed valuation, or about $12 a month per household, according to an announcement from the district.

"We believe that making the hospital seismically safe and ensuring that life-saving, up-to-date medical technology is available to citizens — especially in the event of a natural disaster such as an earthquake — is a critical part of our mission," Marin General Chief Executive Officer Lee Domanico said in a statement. 

When the hospital was originally constructed more than 60 years ago, it required a GO bond, according to Jennifer Rienks, chair of the district board.

"It is now time to build a new Marin General Hospital and this generation of Marinites will be asked to support a bond measure so that we can continue to have a full service acute care hospital in our community," Ms. Rienks said in a statement. Marin Healthcare District officials have long said the hospital is need of an upgrade, not just because of the seismic mandate but also in order to remain competitive and to incorporate the best possibly technologies.

"Rebuilding the hospital is essential if we are to be able to continue to attract and retain high quality physicians to Marin County," said Dr. Joel Sklar, chief medical officer of Marin General.