A developer wants to build a complex of medical offices in Weymouth’s Libbey Industrial Park, a development that would be one of the largest in the town in a decade, according to the Planning Director James Clarke.

“This will change the whole composition of the park; it’s going to kick up the quality of the park clientele,’’ Clarke said, adding that the project is second in size only to SouthField’s plans for the former South Weymouth Naval Air Station.

FoxRock Properties is proposing to build three office buildings — with 226,000 square feet altogether — and three parking garages on four properties it owns in the industrial park. As part of the plan, the Quincy-based company also wants to tear down a warehouse-type building at 200 Libbey Parkway that is currently used for paper recycling.

The developer is scheduled to come before the Board of Zoning Appeals on Jan. 6 for initial approval so it can market the buildings as medical facilities, Clarke said. FoxRock would need to come back for final approval once it has more specific plans, he said.

Also at the Jan. 6 meeting, South Shore Hospital is scheduled to appear to ask for approval to add two stories to its three-story Messina Building and a two-story connector to the adjacent Pratt Building.

Clarke said the hospital plans to build 24 intensive care units in the Messina Building addition and to transform 24 existing intensive care units in the Pratt Building into regular patient rooms.

The hospital also wants to add two emergency generators next to 62 Columbian St., he said.

Johanna Seltz can be reached at seltzjohanna@gmail.com.