(KTLA-TV)

LOS ANGELES -- Under an ordinance just approved by the City Council, all new buildings in Los Angeles including homes must have anti-graffiti coating, unless the owners sign a contract vowing to remove any graffiti on their property soon after it appears.

The clear coating would be applied over existing paint on outside walls and doors to a height of at least nine feet.

If taggers strike buildings with the protective coating, the paint would be easier to wipe off.

But, the anti-graffiti coating is not cheap.

Online searches showed a price range of about $60 to $632 per gallon, depending on the quality of the product.

Los Angeles City Council unanimously approved the measure Tuesday.

Under the current language of the Los Angeles Municipal Code, single-family dwellings are not required to have an impermeable surface such as ceramic tile or baked enamel.

Exceptions to the ordinance may be granted if the property owners sign a contract, promising to remove any graffiti on their property within a week or within 72 hours of being notified by the Los Angeles Department of Building and Safety.

Then-Councilwoman -- now City Controller -- Wendy Greuel asked for the exception when she introduced the ordinance, noting that anti-graffiti coating "often discolors the surface of buildings and is not always environmentally friendly."

The ordinance will take effect 30 days after being signed by the mayor.