The search for a temporary site has been constrained by a limited supply of available office space in Carol Stream. Officials previously considered a vacant industrial building about a mile and a half from the 40,400-square-foot village hall, but that property was tied up in bankruptcy proceedings.

“This is one of the few buildings that was available that has offices currently in it,” Mellor said of the property on North Avenue, west of Schmale Road.

Other police department operations — traffic, special operations and investigation units — will move in early March to the Glendale Heights municipal complex at 300 Civic Center Plaza under a lease approved by trustees in both towns.

Carol Stream will pay Glendale Heights a token $10 under the terms of that deal.

The village hopes to keep all the costs associated with the relocation and a temporary facility to about $1 million. About $18 million would pay for designing, building and equipping a village hall that would increase in size to 68,750 square feet. The village plans to use cash reserves to pay for the project without taking loans.

Besides the addition, the project would renovate the rest of the 37-year-old building.