St. Johns Properties Inc., a Baltimore-based developer of flex, office, warehouse and retail space, has completed the expansion of Lisbon Center, a retail shopping center located at the intersection of Interstate 70 and MD Route 94 in Howard County.

As part of the $800,000 expansion, the company has added more than 8,000 square feet of space to the project, bringing the size of the total center to more than 54,000 square feet of space.