WHITE PLAINS – Renovations of the former Nestlè Co. headquarters are complete and the owners are now asking the city for a one-year extension on their permit to build boutiques and a restaurant with outdoor dining.

The first phase of the $30 million makeover at 120 Bloomingdale Road saw construction of a new facade, conference space, upgraded gym, a new child day care center and other improvements at the existing 145,000-square-foot office building that is set back on the 5.8-acre site. Tenants include the Westchester County Employment Center, Byram Healthcare and Keller Williams Realty White Plains.

The property owners, 120 Bloomingdale Road LLC, now plan to build 53,000 square feet of retail space along Bloomingdale Road, across the street from the Bloomingdale’s department store.

Now dubbed Heritage White Plains, developers say the new building will provide “an open-air luxury shopping destination” with high-end boutiques, a 6,000-square-foot restaurant with indoor and outdoor dining, valet parking and other amenities.

Tenants have not been announced, but William Null, the lawyer representing the owners, said in a letter to the city that “we have been advised that there is strong market interest in the site and we expect to be able to provide you with positive news within the next few months.”

Originally approved by the Common Council in 2008, the project fell through when the economy collapsed. The property subsequently changed hands and the new owners received a year-long extension of the approvals and special permit for the restaurant in June.

Null, from the Cuddy & Feder law firm, said there have been no changes to the design.

The request has been distributed to various city departments for review, and will most likely be voted on at next month’s Common Council meeting. It was not clear when work on the retail element of the project will begin.