The tax of $23 per parcel on properties would generate about $54 million a year and would replace Proposition A, a voter-approved 1992 assessment that is set to expire in June 2015, said Department of Parks and Recreation Director Russ Guiney.
Guiney said the county has about $134 million in unallocated funds for parks and other facilities.
"In two years, that money will pretty much all be gone," he said. The new tax would take effect in mid-2015 and provide additional revenue for 30 years.
If approved by voters, the new flat tax would represent about a $10 annual increase for the average single-family residence, which pays about $13 a year under the expiring assessment, Guiney said. The amount of the current assessment is calculated in part by formulas that take into account how much properties benefit from improvements funded by the levy.
For example, some properties, such as vacant lots, are taxed as little as 3 cents a year, while commercial properties can be taxed as much as $10,000 a year, he said. The proposed new flat tax would be $23 on any property, regardless of its size.
"With two days notice, we are possibly placing a half-baked tax on the ballot that will impact taxpayers for years," he said.
"We don't need to reinvent the wheel, we can build on what was done" in 1992, Yaroslavsky said.
The measure, officially called the Safe Neighborhood Parks, Youth/Senior Recreation, Beaches/Wildlife Protection Measure, requires the approval of two-thirds of the voters.