LOWELL -- Several months ago, RD Management of New York purchased the 133,000-square-foot section of the Meadow Brook Center shopping plaza adjacent to the Target on Plain Street for $6 million, with hopes of breathing new life into the complex.

The real-estate development and management company has wasted little time.

Construction has begun to prepare thousands of square feet of empty space for new commercial tenants, with businesses expecting to open their doors in late summer or early fall.

RD has signed leases with three businesses to fill the upward of 20,000 square feet of unused space between Marshalls and Lincoln Technical Institute at the far end of the plaza.

The tenants will be apparel stores Eblens and Dots, as well as The Children's Place, a clothing store for children. Work is also under way to secure a fourth tenant for that section of the plaza.

"This is the first time in a long time someone has injected capital and worked to turn this part of the space into a viable end of the shopping center," said Roger Hirschhorn, a partner at RD Management, during a site tour on Thursday. RD Management's portfolio consists of more than 200 properties, including the Shops at Billerica, formerly Billerica Mall.

The former Bally's Fitness space next to Chuck E. Cheese's will also be occupied in the coming months. Best Fitness will open a new 17,000-square-foot location and Five Below, a discount retailer for teens and pre-teens, will

occupy close to 8,000 square feet.

A third space remains to be filled in that portion of the center, but Hirschhorn said multiple retailers are looking at it.

The former Blockbuster space at the end of the center closest to Target will have new tenants, too. GNC, Hair Cuttery and Sleepy's will occupy 7,500 square feet.

"The demand has been strong for the open spaces and the rents have been strong, which is a testament to the vibrancy of the city of Lowell," Hirschhorn said.

The tenants already at the shopping center -- including Marshalls, China Buffet and Nails Depot -- will remain.

Chuck E. Cheese's is also staying and expanding to include the space formerly home to Isabel's Burritos.

To give the complex a more unified feel, a new dark bronze facade will be constructed. Columns will be wrapped with brick and all of the exterior walls will be painted to match Target's tan and brown colors.

Approximately $2 million is being spent on the revamp of the site, said Hirschhorn.

"Shoppers will have a more pleasant shopping experience than what they have had in the past and will have more options," said Hirschhorn.

Current tenants are looking forward to the new stores coming on board.

"All the new and exciting stores will bring more business," said William Guo, manager at China Buffet.

In addition, RD Management also plans to build a new 4,700-square-foot commercial building at the front of the center's parking lot.

Hirschhorn envisions a retailer or a restaurant occupying the space.

The Planning Board is slated to decide whether to grant site-plan approval to the proposed new building at Monday night's meeting.

The building will take up a portion of the parking lot, so plans include adding 74 parking spaces behind Lincoln Technical.

City officials are thrilled about RD Management's purchase of the Meadow Brook site.

"We are certainly pleased that this investment will substantially upgrade the plaza and bring a number of new retailers with national profiles to Lowell, expanding the options for residents to meet their shopping needs in the city," Assistant City Manager Adam Baacke, head of planning and development, wrote in an email.

Follow Lyle Moran on Twitter @lylemoran.