Frequently Asked Questions

Here are some of windows and doors replacement questions that frequently ask by our customers.

We sell and install all kinds of Windows and doors for both residential & commercial buildings.

You can call 631 228 8001 or text 516 888 0122; You can also email sales@masterwindows.com to make a schedule.

We offer many different options. For branding, we carry Marvin, Pella, Anderson, Siera Pacific, Crystal and Thermal Tru. For types, we have double hung, casement, sliding, awning, hopper, tilt and turn windows and exterior doors. For materials, we have vinyl, composite, aluminium, fibreglass, all wood and clad wood windows and doors.

Yes, Master Windows are insured and licensed for Suffolk County, Nassau County, New York City, New York, Connecticut and New Jersey.

Yes, we not only do residential work but also commercial work. We have a very professional installation team. They have more than 20 years of experience.

Yes, we will remove old windows, install new windows, and dispose of all the garbage. We will take care of everything from start to finish.

Yes, we offer energy-efficient windows and doors. The glasses will be double pane with low-e energy-saving glass and argon gas between the glasses.

Yes, we will clean up and vacuum before we leave.

Yes, we can customize the windows and doors. After checking your windows and doors, we will offer our design and suggestions, and help you find out the best option for you.

Most of our windows and doors products come with 20 years or more limited warranty.

Yes, of course. You can see some of our previous work by visit our Gallery.

We serve Long Island (Nassau County and Suffolk County), Queens, Brooklyn, Manhattan, Bronx, Staten Island and Westchester. If you have 10 windows or above, we can also serve New Jersey and Connecticut.

Yes—new energy-efficient windows can cut heating/cooling bills by 20–30%, increase resale value, and improve comfort.

Most like-for-like replacements don’t require a permit, but structural changes (expanding openings) may need DOB approval.

Typically between $7,500–$12,000, depending on material and style. (Last update August 2025)

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