The Zoning Board of Appeals will hold a hearing on Wednesday at 7 p.m. on a challenge to a proposed group home for disabled young adults on Mikayla Way. Neighbors have asked the board to revoke the project’s building permit, which was issued in April. Jewish Family and Children’s Services of Waltham is renovating the single-family home, which sits on two acres abutting the Bird Middle School, to serve nine residents and two staff members. An agency spokesman said the residents would be “high-functioning people” with disabilities such as autism, Down syndrome, and cerebral palsy, who work or go to programs during the day and need help to live independently. The agency operates four similar group residences in Norwood. The hearing will be in the main meeting room of Walpole Town Hall, 135 School St.