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Top-Rated Sliding door installers in Williamsport - Updated Nov 2026

John's Small Jobs Services
3.4(
54
)
Sliding Door - Install

Serving Williamsport, PA and surrounding areas

Approved

In business since 2017

Free estimates

Customers say: Quick response

"Very pleasant and easy to work with. It took some time to get started because of other projects, but work went quickly once started. The company sent the wrong color composite material and we didn't catch the error before it was installed. John and his crew fixed the mistake at his cost and without hesitation! The porch was finished and exactly what we wanted in no time. I will definitely look to John for any future work needed because of the craftsmanship and customer service."
Response time1 day
Response rate90%
158 neighbors recently requested a quote
Avatar for AJ Window and Door Solutions, Inc.
AJ Window and Door Solutions, Inc.
4.5(
235
)
Sliding Door - Install

Serving Williamsport, PA and surrounding areas

In business since 2009

Free estimates

Credit card accepted

"Working with Tom and James, Brian, Nick, and Tom was a pleasure! Tom came to my house, masked (due to COVID19) and sold me the window.His price was very reasonable and within the realms of other quotations I had received. The time frame he set for the installation was within days of the actual work being done. His workmen were fast, (window was installed in 2 hrs!) extremely courteous, and Clean!!!! I am VERY pleased with my new window! I would Highly recommend this company."
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+46

Recommended by91%of homeowners
Avatar for Castle "The Window People"
Castle "The Window People"
3.5(
172
)
Sliding Door - Install

Serving Williamsport, PA and surrounding areas

In business since 1977

Free estimates

Emergency services offered

"The windows were manufactured earlier than we expected and we were promptly contacted about installation. Although we were told the installation was scheduled for two days, the four man crew that arrived was able to finish in a single day! Each window was installed with the same consistency in quality and efficiency. Furthermore, the crew did an excellent job protecting our floors and furnishings in every room. When it comes to evaluating the installation crew, we couldn't be happier. Regarding price, we probably paid more than we should, but that's on us. We advise getting several other quotes first and then get Castle's quote. This will definitely help in your negotiating. The windows have definitely helped to eliminate draftiness in our home and helped to maintain a consistent temperature."
Before
After
Recommended by70%of homeowners
Avatar for Keystone Door Solutions, LLC
Keystone Door Solutions, LLC
5.0(
2
)
Sliding Door - Install

Serving Williamsport, PA and surrounding areas

In business since 2003

Free estimates

Warranties offered

"Called took the time to come within an hour. Replaced entire garage door opener.Very pleasant and efficient. Great personality! Would recommend Rob to anyone. Cost very reasonable. Thanks Rob"
Our Work!
Our Work!
Our Work!
Our Work!
Our Work!

+4

Response time10 hrs
Response rate100%
Castle "The Window People"
3.5(
51
)
Sliding Door - Install

Serving Williamsport, PA and surrounding areas

Free estimates

Credit card accepted

"Quality of the windows are excellent. The windows are beautifully capped. Installers were great. Job took two days (one to replace, the second to cap). Windows took about 5 weeks (from sales visit to original install date). Good to know: - Initial installation appointment was rescheduled the morning of due to rain. - Installers remove window treatments but do not put them back up. - Good to have drop-cloths around since installers did not seem to have enough of them and don't take their shoes off during replacement (since they're constantly in and out)."
Recommended by78%of homeowners
Showing 1-10 of 19

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