A longtime downtown furniture and home store is moving and expanding.

Winfield House is moving from its 15-year home at 835 Mass. into vacant space at 647 Mass., which formerly housed Abercrombie & Fitch.

The move, slated to be complete by Sept. 1, will allow the store to expand from 3,000 square feet to about 7,500.

“At our current space we’ve stayed focused on more of a traditional home furnishing theme,” said founder Win Campbell. “We won’t abandon that, but this will give us a chance to bridge out to a little more of an urban theme that is quite popular.”

Campbell said the store, which sells furniture and home accessories, has been able to compete with regional furniture superstores by focusing on hard-to-find items, and by being in a unique shopping district.

“I really can’t say enough good things about Massachusetts Street being strong and viable for this type of business,” Campbell said. “Certainly the economic times could be better for a move, but when an opportunity comes along to grow, you take the opportunity.”