MUKILTEO — A developer could soon have permission to log the site of the controversial Frognal Estates subdivision, the subject of a long-running legal battle with neighbors.

Snohomish County planners on Thursday approved grading and forest practices permits for the 112-home project. The grading permit is for logging roads, staging areas and erosion control associated with the tree harvest.

Opponents of the project have 21 days from the grading decision to file an appeal in Superior Court. The permits aren’t issued until after appeal periods have expired. Crews are allowed to do some work ahead of that deadline, such as installing fences, planners said.

Integral Northwest is pursuing the project. Frognal was grandfathered under land-use rules from 2005, which were less restrictive. It was then known as Horseman’s Trail LLC. It’s on unincorporated land in Mukilteo’s future annexation area, covering hilly, wooded terrain next to Picnic Point Elementary School.