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  • Verified reviews icon626
    Verified window and door contracting services reviews

Top-Rated Window and door contractors in Mountainside - Updated Nov 2026

Avatar for Glass by Ro
Glass by Ro
5.0(
92
)
Window Glass - Install or ReplaceDoor or Window Screens - Install or Repair

Serving Mountainside, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Emergency services offered

"Rolando is your guy. Good price, great work, excellent communication. Gave me estimated and a timeline and installed me a beautiful glass shower enclosure and replaced a window downstairs as well as screens and a screen door. Honest, quick and professional."
Mirror table repair
Mirror table repair
Mirror table repair
Mirror table repair
Mirror table repair

+1

Response time7 hrs
Response rate99%
8 neighbors recently requested a quote
Avatar for Star Windows Doors and Siding
Star Windows Doors and Siding
4.9(
230
)
New Windows - 2New Windows - 3-5

Serving Mountainside, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 1999

Emergency services offered

Credit card accepted

"Star window and door were excellent. Came exactly on time for the estimate and returned two day later again exactly on time to complete the job. It was refreshing to deal with a contractor who respected time. He did an excellent job fixing my siding. I would highly recommend this company."
My jobs
My jobs
My jobs
My jobs
My jobs

+16

Response time6 hrs
Response rate92%
2 neighbors recently requested a quote
Avatar for Indigo Construction Co.
Indigo Construction Co.
5.0(
24
)
Doors (Exterior) - Install or ReplaceDoors (Exterior) - Install or Replace - For BusinessDoors (Interior) - Install or Replace+6 more

Serving Mountainside, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Emergency services offered

"We couldn’t have replaced this door with a better expert. Ryan took measurements and photos, then recommended several doors in various price ranges. We didn’t realize how many options come with storm doors. Ryan gave us some really good recommendations and helped us make a great choice. He installed the door in a half day while we were out. Came back to a gorgeous door/screen storm door combo- something we weren’t even sure could have been done to begin with. Important to know:Throughout the entire process, Ryan was responsive and easy to reach. That’s vital in a world where ghosting is the norm (unfortunately). Ryan is the expert you need for your remodeling needs. Highly recommend!"
Doors Project
Remodeling - Kitchen & Bathroom Project
Buena Vista
N. Mich
Remodeling - General Project

+64

Response time1 day
Response rate100%
4 neighbors recently requested a quote
Avatar for Essex Replacement Door & Window, Inc.
Essex Replacement Door & Window, Inc.
4.5(
40
)
Doors (Exterior) - Install or ReplaceDoors (Exterior) - Install or Replace - For BusinessSliding Door - Install+3 more

Serving Mountainside, NJ and surrounding areas

Approved

In business since 1982

Free estimates

Credit card accepted

"These guys are super stars. They also did all my windows. We had the awful pressure sales experience from Renewal By Anderson and these guys did an amazing job in one day and much better priced than Renewal and a pleasure to deal with Dennis the owner. We actually just had more work done by them (another door) and Marco and Santos and the rest of the team were exceptional as always. Couldn’t recommend these guys enough."
Response time2 days
Recommended by88%of homeowners
Avatar for Monk's Home Improvements Inc.
Monk's Home Improvements Inc.
4.7(
600
)
Doors (Exterior) - Install or ReplaceNew Windows - 3-5New Windows - 6 +

Serving Mountainside, NJ and surrounding areas

Approved (Corporate)

In business since 2007

Free estimates

Credit card accepted

Along with the Monk's Kitchen & Bath Design Studio, we are a full-service home improvement provider. Monk's will help you plan, design, and purchase everything you need for a remodel. Then our expert craftsmen will install everything and our painters will come and complete the job.

Recessed Shelving
Reach-In Closets
My jobs
My jobs
My jobs

+19

14 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Home Genius Exteriors
Home Genius Exteriors
4.9(
134
)
New Windows - 3-5New Windows - 6 +New Windows - 2

Serving Mountainside, NJ and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"I had an amazing and efficient experience with Home genius exteriors. My siding, windows , doors & Gutters are all brand new. My project Manager Ivan was amazing and very communicative on all cylinders."
Attic Insulation
Attic Insulation
Attic Insulation
Attic Insulation
Attic Insulation

+53

Response time2 hrs
Response rate99%
37 neighbors recently requested a quote
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Window Door Contractors FAQs, answered by experts

Rescreening your porch can take a few hours to a whole day, depending on the size of the enclosure and the amount of screen that needs replacing. If you decide to have a professional handle the rescreening, be sure to get a timeline and a cost estimate so you know how long you’ll be without the screened-in space.

Professionals ensure repairs not only fix current problems but also prevent future issues, improving efficiency and aesthetics.

If your door has interchangeable inserts, you’ll likely want to swap the glass out for a screen during the summer months. The process to do so will vary by door, but you’ll follow these general steps: First, use a flathead screwdriver to pop out the retainer strips—the plastic strips running down both long (and sometimes all four) sides of the door. Then gently pull them out by hand. Carefully remove the glass insert from the door and replace it with the screen. Finally, push the plastic retainer strips back into place, working from top to bottom.

Yes, a variety of screen materials cut out glare from the sun. Solar screen material can block up to 90% of the glare and heat from the sun, saving on cooling costs. It also offers privacy yet unlimited outward visibility. The cost depends on the size of the screen roll, but solar screens cost between $25 and $90 per roll.

Many kinds of window screens, such as solar screens, are designed to reduce the amount of harmful ultraviolet rays that pass through them and enter your home. The materials typically have UV-blocking properties. However, they may not completely eliminate all UV rays from passing through your home. Different window screens are designed for different purposes, and not all are designed to block or reduce UV rays. Do your research to make sure you’re getting the type of window screen to suit your needs.

The Mountainside, NJ homeowners’ guide to window and door contracting services

From average costs to expert advice, get all the answers you need to get your job done.