Referrals for children under three go to the NJEIS Central Regional office, and parents can make them directly. What shapes the Union County version of this story is the commute — a large share of parents here are heading toward Newark or New York in the morning, so early-morning and late-afternoon therapy blocks are the ones in demand. Confirm those blocks exist before you build a plan around them; a schedule that only works at 10 a.m. is not a schedule for a household with two working parents.
Berkeley Heights, Westfield, Summit, and Cranford all operate their own preschool classrooms, and several participate in shared regional programs when an in-district room isn't the right fit. The mechanics are the same statewide — written referral, identification meeting inside 20 calendar days, evaluations and eligibility within 90 days of consent — but the pacing differs, and a referral submitted at 30 months rather than 34 is the difference between a placement waiting on the third birthday and a gap that nobody intended. Scotch Plains–Fanwood runs K–12, so the preschool program feeds directly into its elementary buildings; ask early whether the case manager stays with your child across that step.
Two questions save Union County families the most trouble later: whether an extended school year is being considered, which the team decides on regression and recoupment evidence rather than on a calendar, and how progress will be reported between annual reviews. Some districts here send quarterly written reports; others share data only at the review, which is a long time to wait to learn something isn't working.
Berkeley Heights is the natural stop for Summit, New Providence, Mountainside, and Warren, with Route 78 pulling traffic in quickly from the Somerset side. Cranford picks up Westfield, Clark, Garwood, Kenilworth, and Scotch Plains, and its proximity to the Parkway exits around 136 makes it the pragmatic option for anyone already using that road. Westfield sits almost exactly between the two — those families should time both drives on a real weekday before deciding.