The fences around a much-anticipated Mission Bay playground will be torn down early next month now that the Board of Supervisors has given the project its final approval.

The Mission Bay Children’s Park, a 2.4-acre green space at Long Bridge and China Basin streets near Mission Creek, was finished in March. But no children have played in the space since its completion, largely because of legislative red tape that has kept the space from opening to the public.

The Board of Supervisors unanimously voted last week to expedite the final review period, which ensures the work done on the playground meets city standards. The board signed off on the park Tuesday, and it will open in early July.

A former industrial area, Mission Bay was home to railroad yards, shipyards and warehouses before being redeveloped. Developers had to finish surfacing surrounding streets and crews from the Public Utilities Commission had to install and test streetlights before the park could open.

Creating a neighborhood from scratch must be done properly for safety reasons, said Rachel Gordon, spokeswoman for the city’s Public Works Department. That takes time, even when it’s a park that’s involved.

Supervisor Jane Kim, who represents the district, said open spaces for children are increasingly important as families flow into the new buildings now rising in Mission Bay.

Lizzie Johnson is a San Francisco Chronicle staff writer. Email: ljohnson@sfchronicle.com Twitter: LizzieJohnsonnn