A resident group has gone to court to block the Kuehn’s Way affordable housing project in Vineyard Haven, claiming among other things that the plan is environmentally flawed and could wind up polluting the wells of neighboring homes.

The Tisbury zoning board of appeals approved the plan for 20 apartments on 14.8 acres off State Road in October. The project was opposed by neighbors concerned about density and environmental impacts. The developer is the Island Housing Trust, which is still working to raise the $6.3 million needed to build the project, and had hoped to break ground by next fall.

The Martha’s Vineyard Commission waived a public review of the project in July, leaving the decision to the Tisbury zoning board. The housing trust is using a comprehensive permit under Chapter 40B, the state affordable housing law.

The resident group filed an appeal in the Massachusetts Land Court on Nov. 22. The appeal seeks to annul the zoning board decision on grounds that the review was inadequate.

Plaintiffs in the case are Robert Dias, Alec Gale and Kristen Kingsbury Henshaw, all neighbors to the planned development in the Red Coat Hill section of Vineyard Haven. Defendants are the members of the Tisbury zoning board of appeals and the nonprofit housing trust.

Reached by telephone this week, Daniel Hill, an attorney with Hill Law in Boston representing the plaintiffs, said the zoning board overlooked key environmental issues because their review was fast-tracked.

“Usually these types of projects take months and involve an in-depth peer review. None of that happened,” he said.

In an email this week, Philippe Jordi, executive director of the Island Housing Trust, called it a setback to the cause of affordable housing.

“With free legal services secured from a Boston law firm, the IHT is confident that it will prevail in requesting the court to dismiss the appeal,” he wrote. “Unfortunately, it’s the Island community and the many working families and individuals struggling to secure affordable year-round rental housing who will suffer the most from this delay.”