Rozansky & Kay Construction will build a six-story office building at the intersection of Rockville Pike and Twinbrook Parkway in Rockville on the site of the Pepsi-Cola Bottling Co. building. The Pepsi-Cola building will be demolished for construction of the $27 million office building, to be known as Twinbrook Metro Plaza.

Rozansky & Kay purchased the 1.89-acre site for $1.8 million from Alberts Warehouse Showrooms Inc. Construction is scheduled for completion in the spring of 1985.

The new 173,000-square-foot building will have surface and underground parking for 623 cars.

The Twinbrook office building is located a block from the Twinbrook Metro Station and is the fifth Rozansky & Kay project planned or under way at a Metro stop.

Other Rozansky & Kay Metro-related projects include the Bethesda Metro Center, the $55 million Judiciary Center, the Twinbrook Office Center in Rockville (also near the Twinbrook Metro stop) and the proposed Tri-Rock Office Park in Rockville and Tysons Commerce Center.

Other recent developments in commercial leasing in the Washington metropolitan area:

* A new $16 million office complex at 1100 Wayne Ave. in Silver Spring has recently signed two tenants. The 12-story building contains 160,000 square feet of office and retail space and features a two-story free-falling fountain and three levels of parking.

Central National Bank has leased 3,200 square feet of space at 1100 Wayne Ave. for a new branch office.

American Bell Inc., a newly formed subsidiary of AT&T, has signed a five-year lease for 53,000 square feet of space.

* Hopkins Place, a 16,350-square-foot retail complex, will open next Spring at Route 3 and Johns Hopkins Road in Crofton, Md.

The one-story project is expected to house 12 retail stores.