If New York appears a little greener this summer, it is no mirage.

New parks are coming to life across the city, many courtesy of new apartment complexes, which, in addition to the usual extras, are offering swaths of switch grass and swamp oaks, waterfalls and fountains, benches and boulder-lined paths.

And although these nods to nature are created by developers and are on the grounds of condo and rental buildings, you won’t need to have a pricey apartment there to enjoy them. In a change from the residents-only courtyards of the past, these open spaces are truly open and, despite their private roots, can be used freely by the public.

“It’s a different kind of amenity,” said Lisa Switkin, a senior principal at James Corner Field Operations, the landscape design firm behind several new parks, including Domino Park, which is opening this month in Williamsburg, Brooklyn, at a former sugar factory.

“It’s not like they’re your parks,” Ms. Switkin said, as they are not the exclusive preserve of owners and renters. “But, wow, you do still have parks right outside your door.”