Shade-casting skyscraper plan OK’d by governor

A Massachusetts bill allowing construction of a skyscraper that would cast shadows on two of America’s most treasured parks — Boston Common and the neighboring Public Garden — has been signed.

Republican Gov. Charlie Baker signed the legislation Friday, clearing the way for a 775-foot tower on city-owned property. The developers offered to pay Boston $153 million for the parcel.

The new law changes rules banning buildings from casting shadows over historic parks. Supporters of the rules say they were crucial in preservation efforts.

The development firm Millennium Partners needed the rule changes to build the tower, which still needs approval from the Federal Aviation Administration because of its height.

The skyscraper would cast shadows on the two parks on many early mornings.