The Thousand Oaks planning commission has recommended an expansion of Los Robles Hospital and Medical Center.

Unless the proposal is appealed to the City Council, the hospital will add space for 60 beds, a fourth floor and a 36-foot parking structure. Plans also call for removing one oak tree, transplanting another and encroaching on three more.

The state requires the hospital to comply with seismic updating by 2013 to protect the hospital in case of an earthquake. While retrofitting, the hospital also wants to expand.

The Los Robles application, approved May 24 by the planning commission, requested a zoning change to accommodate the parking structure.

Four commissioners, with Commissioner Mark Lunn absent, recommended that the City Council certify the project’s environmental impact report.

The hospital project and environmental report are expected to go before the City Council in July.

Currently the 375,000-square-foot hospital is approved for 277 beds and has 224. The final total number of beds would be 337 if the 60 proposed beds are approved, said Mark Towne, T.O. community development deputy director.

The fourth floor would be built on top of the new three-story wing that was finished in 2007. An additional four-story wing is part of the new proposal.

The amount of additional square footage that was requested is 232,000, which doesn’t include the proposed six-story parking structure, which would have two floors below ground and four levels above, Towne said.

To build the parking structure on the northeast corner of Lynn and Janss roads where there’s currently a surface parking lot, the council would have to issue a development permit and change the site’s designation from commercial to public lands/institutional to match the rest of the hospital, Towne said.

A municipal code amendment is also needed to update the city’s current parking space requirement for hospitals from 1.8 spaces per bed to more than 3.5 spaces per bed.