Once there were more than 400 bungalow colonies, said Al Bard, a longtime owner.

How many more longtime owners can absorb those kinds of losses?

He managed the business for Lea Lake, a longtime owner who died in 1988, and became a partner shortly before she died.

In other buildings, longtime owners are greeting their new neighbors with a mix of enthusiasm and unease.

For longtime owners of Martha Stewart, it was just the most recent roller coaster ride.

Mr. Smith has already been approached by several longtime owners in the neighborhood, offering to sell him their buildings.

Others are longtime owners who have given radical makeovers to familiar restaurants.

The people coping with foreclosure in these neighborhoods include longtime owners like Ms. Sparrow who have lost their income because of the recession or illness.

But while gentrification may push up rents and taxes, it also rewards longtime owners who take high prices for their homes.

Other longtime owners have expressed similar sentiments.