Clark Construction Group and design firm Perkins Eastman have ended their court fight over the $1.2-billion first phase of a mixed-use project in Washington, D.C.,  with each side agreeing to pay its own attorneys costs and expenses.

Contested in U.S. District Court for the District of Columbia since 2018, the matter was closed in a joint stipulation of dismissal late last month. Each side agreed to pay its own attorneys costs and expenses.

Terms were not disclosed.

Clark had a fixed-price, design-build contract with developer PN Hoffman and Madison Marquette for the 1.4-million-sq-ft first phase of The Wharf located in Washington's southwest waterfront area.

The Clark contract was $457 million, the firm said. Perkins Eastman served as the overall project’s master planner and master architect.

Clark had filed a professional negligence and breach-of-contract lawsuit against the Washington, D.C., office of Perkins Eastman, related to its first-phase design.

In the lawsuit, the contractor originally sought $5 million for claimed design errors in columns and beams, rebar, foundation piles and the tolerances needed for a theater and concert hall's acoustics.

In a statement , Clark said the company was "pleased to have reached an amicable agreement" and looks forward to working with Perkins Eastman again.