YONKERS-A host of county and local dignitaries will be on hand for the Fourth Annual Planning Conference of the Historic River Towns of Westchester on Sept. 13 at the Hudson River Museum.

LAGRANGEVILLE, NY-Miron Lumber, a major lumber wholesaler and distributor, has placed $40 million worth of real estate on the market. The package includes home center showrooms, manufacturing plants and vacant land.

VALHALLA, NY-Rockland County resident joins Westchester-based firm as vice president and chief marketing officer.

YONKERS-$70 million Classic Residence by Hyatt complex signifies one of the largest area investments in years.

WHITE PLAINS-New York Presbyterian Hospital has filed an Article 78 petition in New York State Supreme Court requesting that it overturn the city's rejection last month of two proposed plans for its 232-acre campus.

NEW ROCHELLE-City is concerned that the change might compete with a high-rise apartment community that is being built nearby.

WHITE PLAINS-McCullough, Goldberger & Staudt will move from its offices in White Plains and Harrison into larger quarters in White Plains.

VALHALLA, NY-Telecommunications company signs lease renewal for more than 57,000 sf of space at the Summit complex.