Projects estimated at $85 million are planned next year by Rozansky & Kay, an area building and developing firm.

Partner Alan Kay said this week that the total project construction includes six office buildings and office parks in this area and a specialty shopping mall in Rockville.

Currently, construction is under way on Courthouse Plaza, an 83,000-square-foot office park of low-rise buildings at Layton Hall and University Drives in Fairfax City. Kay project the total cost of the four buildings at $5 million. Construction and permanent financing have been obtained from Equitable Trust Co. of Baltimore and State Mutual Life Insurance of Worcester, Mass., respectively. Occupancy is scheduled next summer.

Kay, whose firm has been in the headliness recently because of proposals to buy both the Rockefeller and Tregaron tracts for residential development in Northwest Washington said 1978 plans also call for:

A February start on a nine-stroy, $12.4 million office building at Rte. 7 and International Drive in the Tysons Corner area. He said that Capital City Federal Savings & Loan has commited $9.3 million for construction and permanent financing for the glass-faced structure designed by Beham-Blair-Winsesett-Duke, Inc.

In March, Rozanksy-Kay plans to start a 10-story, $11.5 million office building with 150,000 square feet of space on a 3-acre tract between the Pavilion apartments and the Jewish Community Center on Montrose Road in Montgomery County. He said the Bucher-Meyers' design provides a center core as an architectural feature of the oblong building that will have a glass-enclosed entry-atrium.

A seven-story, 157,000-square-foot Tysons Atrium Center on Rte. 7; a $14.3 million project designed by Bucher-Meyers.

A 200,000-square-foot office park at Montrose Road and I-270 in West Rockville, an $18 million project of four buildings, one of which has been preleased.

A seven-story Tysons Beltway Center, projected at $14 million and due to be started next fall. CAPTION: Picture 1, Two of the projects planned for next year by Rozansky and Kay include a 9-story, $12.4 million office building. The building, designed by Beham-Blair-Winsesett-Duke Inc., will be at Route 7 and International Drive in the Tysons Corner area.; Picture 2, Another project is a 10-story, $11.5 million office building on Montrose Road in Montgomery County. It was designed by Bucher-Meyers. A unique feature of the center is the glass-enclosed entry-atrium., Rozansky & Kay