Backyard tiny homes are finally legal in New York City. They could be a boon for homeowners who can afford construction.

Thousands of New York City homeowners are finally eligible to build a tiny home, or accessory dwelling unit, in their backyards.

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• New York City now allows some homeowners to build backyard tiny homes called ADUs.
• The new zoning law aims to create 25,000 homes by legalizing additional homes on eligible lots.
• But high construction costs and regulations may limit ADU adoption.

It's open season for some New York City homeowners interested in building a tiny home in their backyard.