Tweaks to Arrowbrook Centre, a mixed-use development approved in 2005 for more than two million square feet of development, are being proposed.

The developer behind the project, which is near the intersection of the Dulles Toll Road and Centreville Road, is seeking to shuffle residential units from one building to another and the change the shape of one building from a L-shape to a U-shape. Roughly 78,000 square feet of footage will be reserved for a future application.

Other proposed changes include adding up to 32 multi-family units and 10 single-family units to a second building. Changes only apply to a 3.4-acre section of the 54-acre site.

“This change would create a more cohesive community and better respond to market demand in this Metro Station area,” according to the proposal, which was submitted in mid-May.

The Fairfax County Board of Supervisors approved the project in 2005. Roughly 280,000 square feet of development were added to the site with the county’s approval in 2015.

Overall, no increase in the total gross square footage or buildings heights isis being proposed.

The Fairfax County Planning Comission will review the project in January next year.