For any non-cosmetic construction work, the Department of Buildings must grant the project governmental approval by issuing building permit. There are two different types of permits the DOB grants, new building and alteration permits, with three different levels of the latter. Which type of permit (Alteration Type 1, Type 2, or Type 3) depends on the level of work being done.
As part of former Mayor Bloomberg’s 2007 PlaNYC initiative to create a greener New York, the City has greatly stepped up its efforts to plant trees around the five boroughs. More Info