A new lease with Blue Bottle Coffee at 1345 Sixth Ave. covers just 953 square feet — but it completed a remarkable hat trick for landlord Fisher Brothers. The java joint will join much larger eateries opening there soon — French-style steakhouse Quality Bistro (10,000 square feet) and Wagamama (14,000 square feet).

The signings are part of the Fishers’ $65 million upgrade of the 2-million-square-foot office tower between West 54th and West 55th streets, which is 95 percent leased.

The changes include an entirely new plaza on the avenue side, and a redesigned Fisher Park public space on the western side. The projects should be finished in the spring of 2020.