Welcome to Allied Additions LLC!
When you need a high quality Extension
Contact Us:

allied additions


For a Free Estimate, Contact Us:

We handle permits, plans & design, and execute permits quickly!


Allied Additions LLC is your first choice for home extensions in Long Island, NY because we can offer the best possible value for improving your home. The specials we offer deeply undercut any of the offers our competitors can make. This places Allied Additions LLC comfortably as the leading provider of residential improvement services in our region.


We can build home extensions on any side of your existing property, offering you the extra space you need. Whether you would like to build a summer home extension or an additional family room, you can rest easy knowing that our team will build the extension of your dreams at a price that you can afford. We build sunrooms and a variety of other home extensions for residential property owners, ideal especially for those looking for ways to avoid selling house.


We know that many construction firms will try to upsell their services by providing low estimates and then asking for more money as work goes on. Our friendly and talented inspectors, however, offer highly accurate estimates informed by our unique combination of experience and knowledge, as well as our scrupulous business practices. There is no need to worry about being overcharged when you're working with the most reputable home extension contractor in the business!


When you choose to work with us, you can rest assured that the estimate you get from our inspector is reliable and accurate. We have built enough sunrooms and special home extensions to know exactly what each project implies, and we make sure our clients are well-aware of those implications. Give us a call today and schedule a visit from one of our inspectors!

Contact Us:

Contact Information

Allied Additions LLC
Baldwin, NY 11510

Hours of Operation

Mon - Fri: 9:00am - 5:00pm
Weekends: By Appointment Only

Licensed & Insured

Nassau County
Lic# H18H7320000