Newbury Street icon Louis seeks someplace trendier

Louis Boston, a fixture on Newbury Street that helped usher luxury retail into the city, will move out of its historic building when its lease expires in 2010, opening up the marquee 40,000 square foot space for the first time in 20 years.

Owner Debi Greenberg, who took over the business in 2003 from her father, Murray Pearlstein, said the trendsetting boutique will leave Newbury Street, Boston's best-known shopping address, for the waterfront or another neighborhood.

Greenberg, who wants to add a spa and bakery to the designer emporium, said she is looking for a new site with the kind of edge Newbury Street used to have.