Home Additions and Extensions Company on long island NY

Gappsi is Long Island’s premiere general contractors on Long Island NY. With over 25 years experience in new home construction, we specialize in all aspects and phases of general contracting, including home additions and extensions.

Licensed and insured, we offer only the highest quality construction and home building on Long Island. We are an owner operated construction company on Long Island NY, servicing the entire New York and Long Island areas. Dormers and extensions are very practical because they provide good value and many affordable options.


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