GS provides outstanding service. The workers are thorough, efficient, clean, and neat. When they are hired to clean windows, they clean inside and out and clean the screens. Mr. Sosa, the proprietor, is friendly, courteous, and eager to please. I live in a 64-unit condominium development. After I used the services of GS for the first time, I informed my neighbors of how pleased I was. Many of them have repeatedly used their service on my recommendation and were delighted with the results. I wholeheartedly recommend GS Professional Window Cleaning to anyone who requires the service at reasonable rates. read more

We havent cleaned our windows in months and had GSPWC come over for an estimate and a general look around the house. Guillermo came with his daughter and they both were very nice people. Very friendly and warm while very serious about their work at the same time. Windows came out spotless and if you have an issue with how one turned out (which I doubt you will) they'll happily fix it with no hassel. Strongly recommend, they were done with my house, that had around 16 windows in less than an hour! read more

I was very skeptical about this company especially when the owner said he would be able to wash our windows inside and out in two hours. WOW....was I surprised when this happened. All of our windows were cleaned inside and out in about two hours, without a mess. You never could imagine that they were even here. They are professional and friendly, and a job well done. They showed up on time and I highly recommend them. Anthony & Millie read more

Our windows have been dirty forever and did not even know it!! We contacted Gs to ask about removing the sections that got etched into our windows (from factory stickers) they offered great solutions and made our windows look better than new. Our complaint(s) was cleaned up perfectly, and then we realized all our windows were cleaned in a way we never knew to be possible!! If you want clean, then this is new team. read more

The guys from GS were superb! Very thoroug, professional and kind. I have sliding glass windows and they can be a bit tricky and some what challenging to clean . But they were very cautious and got every spot! My windows are crystal clear. I'm very happy with the result. I will continue to use them seasonally and totally recommend their work. A great experience! Thank you Yady! read more

I have worked with GS professionals window cleaning at my property The Forge LIC for 5 years now and they continue to impress us with the quality of work, cleanliness and promp service. I am starting a new job managing The Harrison and will definitely bring them aboard as our preferred vendor. Shout out to Sosa and his guys!! read more

We have used GS for several years now. They are always on time, professional, courteous & thorough. They completely power wash our house every October and do our windows inside & out. Everything remains spotless until we call them again. We don't know what we'd do without them! And the price is right! Maria & John Catalina read more

Excellent window cleaning service! The team was professional, punctual, and very thorough. My windows look spotless, and the difference is amazing. They were friendly, respectful of my home, and completed the job efficiently. I highly recommend their services and will definitely use them again. (6/19/26) read more

Professional, kind, hard working and responsible - just a few of the words to describe this company. My windows look amazing and they went above and beyond to help me with issues that weren't necessarily their responsibility. I can't wait until they come back again. Looking at NYC in a whole new way! read more

Great company and service! We had our windows cleaned in our apartment (11 windows) in Manhattan. They were very nice, accommodating, and personable. They did an amazing job cleaning our windows! I can't believe the difference, wish I would of taken a before picture. Highly recommend! read more

GS professional window cleaning is one of the best window cleaning companies I have ever worked with in the five boroughs of NYC! Very easy to work with and they get the job done in a timely professional matter. I recommend them to anyone who is looking for a window cleaning company. read more

first time using this window cleaning company and i got to be real with you this guys know how to do their job . what really impress me was how much care and attention they take to make sure it's extra clean and the job is well done . I will be calling them again for sure !! read more

GS Professional Window Cleaners are top notch. Prompt service, reasonable rates, and they do a fantastic job!! I have used them twice already and will definitely be calling them again when I need to get my house and deck power washed. They definitely will cater to your needs. read more

These guys are always reliable, do a great job and are friendly too. I totally trust them in my home (midtown Manhattan). They work quickly and the windows look perfect. I am always happy once they've been here. It's better to look out at the world through clear windows! read more

GS is the window cleaner of the tower where I live, where the windows only open 1.5 inches. Therefore they must be taken of the hinges. He always does a thorough job, leaving exterior and interior glasses impeccable, sun shining right through! Highly recommended! read more

This is the third time I have used GS Professional Window Cleaning to powerwash my house and deck. They are very neat and pay attention to detail. They are prompt, courteous and reliable and do a tremendous job. I highly recommend them. Sosa is top notch. read more

We have been using GS window Cleaning for years. They come to our apartment and hang out the windows and leave them spotless. They're always kind and serviceable. It makes being at home a million times more pleasant when we are looking out shiny windows! read more

GS just cleaned my windows ( I live on Upper West Side) and have done an amazing job. They were on time, professional and my apartment is now so much brighter. Very happy and can't recommend this service high enough. Thank you! read more

Guillermo is very professional with his work and always finishes at a fast paste. Leaves everything back to the place it was before starting his work. And verifies with the customers to make sure there satisfied with his work. read more