A new plan for Metro Rahway will net an additional 13 parking spaces after acquiring an adjacent lot and adding a fitness center and leasing office to the original proposal. The Planning Board on Tuesday night unanimously approved an amended site plan, relaxing the parking requirements under the city’s redevelopment plan.

Building to left was acquired.

With the addition of 20 spaces as a result of acquiring 91 W. Cherry St., a leasing office and fitness center was added to the Campbell Street side, eliminating seven spaces from the parking garage, according to Clay Bonny, managing member of Heartstone Development. He told the Planning Board  that the project probably would be completed by about August 2014.

The 116-unit rental project on Campbell Street between Elm Avenue and West Cherry Street originally had about 107 on-site parking spaces in a ground-floor parking garage and another 18 on-street spaces (a ratio of 1.07 per unit). The additional 13 spaces will bring the total spaces provided to 138 (120 on-site), for a ratio of 1.18 — closer to the 1.25 required in the redevelopment plan. The added parcel also reduces the impervious coverage from 75 percent to 72 percent.

The addition of Lot 6 also allowed for moving the West Cherry Street entrance a little further away from Campbell Street as well as increasing the side setbacks, reducing the building’s footprint. Another adjacent property is for sale by owner but Bonny said it would not affect his project enough to acquire it.

Metro Rahway acquired 91 W. Cherry St. (Lot 149, Block 6) in May for $157,500, according to property transaction records. The property, assessed at about $110,700, paid almost $6,700 in property taxes last year. In all, The developer has spent almost $3.5 million to acquire the six parcels that make up the 1.6-acre Metro Rahway site. The six lots were most recently assessed for a total $1.285 million, generating property taxes of about $77,750.

One longtime West Cherry Street resident spoke during the public session of the meeting, supporting the project but raising concerns about the lack of on-street parking.