Data & Special projects

Accessory apartments in private homes on LI.

LI rules on apartments in private homes Long Island has 112 towns, cities and villages with regulations about apartments in private homes. Here are details compiled by The Long Island Index. Read more

Long Island's top public companies.

Long Island's top public companies Long Island's major publicly traded companies collectively made nearly $32.7 billion in sales in 2016, an increase of 3.3 percent over what the same companies made in 2015. Read more

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