A citywide overhaul of bicycle parking requirements for new development will be adopted after the Board of Supervisors approved the legislation unanimously on Tuesday.

The ordinance will, by and large, increase bike parking requirements for new residential and commercial buildings, which have been put in place on a piecemeal basis since 1996. Planning Department staff said the legislation will set consistent, stricter standards that are more in line with those set in cities like Portland, Vancouver, and New York.

Whereas the guidelines adopted about a decade ago generally required one bike parking space for every 50 tenants, the new ordinance will help provide “infrastructure to support bicycling for the 21st century,” said Supervisor John Avalos, who sponsored the legislation.

The overhaul would apply to new construction and building expansions, and bike parking requirements would vary according to a building’s size and type. Residential buildings with four or more units will be required to provide one secure bike parking space per unit. Smaller buildings would only have to meet the standard of providing indoor storage space, like inside a garage.

Commercial developments would also have to provide more bike parking for customers and employees. For example, under the old planning code, a new grocery store of 30,000 square feet would have been required to have only three bike parking spaces, be they provided with secured lockers or cages (“class one” spaces), or outdoor racks (“class two”). Under the new requirements, such a store must have at least four class-one spaces and 12 class-two spaces.

A new office building of 100,000 square feet would have previously only needed 12 bike parking spaces. Under the new regulations, it must provide 100 class-one spaces and 22 class-two spaces.

Existing city-owned and -leased buildings and parking garages will be required to retrofit facilities to accommodate bikes. “We want the city to be a model in providing bicycle parking,” said Kimia Haddadan of the Planning Department at a recent supervisors hearing on the ordinance.

Developers can also pay a fee in lieu of providing some of the required class-two parking spaces, said Haddadan. The fee is $400 per space (or $800 per rack), which would go toward a citywide bike parking fund managed by the SFMTA.

“We need to help people live and work in our urban environments,” said Leah Shahum, executive director of the SF Bicycle Coalition. “That is the way of the future, and we need to think diversely about how we’re moving people.”