After bumpy road, North Haven private school construction approved for new site


NORTH HAVEN — Construction of a new private school is poised to move forward on a new site after the organization’s initial proposal sparked intense community pushback.

Slate School in July received approval from the Planning & Zoning Commission to construct a campus on Kings Highway.

Set to serve grades 7-12, the “Upper School” would be Slate School’s second campus in town. Located at 124 Mansfield Road on neighboring the site of the future campus, Slate’s existing “lower school” serves K-6 students.

The organization plans to open its Upper School in fall 2024 with a class of seventh-grade students and have a full cohort of 90 students by 2029, according to a statement from Head of School Julie Mountcastle and founder Jennifer Staple Clark.

“We are delighted that our proposal for the building of the Upper School on the property adjacent to our Lower School was approved by the North Haven Planning and Zoning Commission,” they wrote. “We are so grateful to the commission for their careful review of our submission, and we are also extremely grateful to all who spoke in favor of our applications.”

Slate School originally proposed revamping the site of a disused church at 5100 Outer Ridge Road for its new school, but the plan drew the ire of neighbors who petitioned against it in late 2020.

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