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    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(
94
)
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

"Ro came to evaluate the glass work I needed for my cracked window glass . It was obvious by his evaluation that he has expertise in this area. He special ordered the glass I needed and promptly replaced the glass on the day we agreed on . He showed up promptly to his appointments and is reliable. He did an excellent job replacing the glass with ease and it is perfect and looks great. He works quickly , thoroughly and neatly. I am very pleased with his work and would highly recommend him. He was also able to replace a screen for my very large patio sliding door and it looks great. Don’t hesitate to hire Windows by Ro"
Mirror table repair
Mirror table repair
Mirror table repair
Mirror table repair
Mirror table repair

+1

Response time7 hrs
Response rate99%
5 neighbors recently requested a quote
Avatar for A Condo LLC
A Condo LLC
4.8(
124
)
Doors (Exterior) - Install or ReplaceDoors (Interior) - Install or Replace

Serving Mountainside, NJ and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"Mike is great! He’s easy to talk to, pays close attention to detail, and helps with suggestions. He’s done my backsplash, painted, put furniture together, and hung a barn door, just to name a few and I’ll continue hiring him!"
Bathroom remodeling
Built in bookshelf
Bathroom remodeling
Before
Bathroom remodeling

+57

Response time3 days
Response rate100%
1 neighbors recently requested a quote
Avatar for Star Windows Doors and Siding
Star Windows Doors and Siding
4.9(
230
)
New Windows - 3-5New Windows - 2

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%
4 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 L&V Window Cleaning
L&V Window Cleaning
5.0(
25
)
Door or Window Screens - Install or Repair

Serving Mountainside, NJ and surrounding areas

Approved

In business since 2022

Free estimates

Small jobs welcome

"Andrew washed all my windows, inside and outside, as well as the windows of three of my neighbors. We are all very pleased with his work. He was prompt, worked quickly and respectfully, and now my windows and screens are spotless!! We all recommend him highly."
Recent Cleanings
Cleaned by L&V
Recent Cleanings
The Finished Result!
Prior to Our Service

+2

Response time8 hrs
Response rate88%
1 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

4 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

"The entire experience was terrific. Everyone was very professional, experienced and friendly. The window quality is first rate. They made sure everything was cleaned up and in working order. I would highly recommend Home Genius. Thank you Matt, Alex and the entire crew."
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

Garage door screens can expand your living space, turning a garage into a home office, gym, or entertainment space. They provide comfortable ventilation, insect control, and privacy, allowing you to enjoy your space all year round. Consult a local garage door screen installer to add this feature to your space.

Typically every 10-15 years or whenever they show signs of wear and tear.

Yes, adding windows adds value to a brick house. Homeowners don’t shy away from more natural light and an opportunity to get fresh air. Adding a window is particularly beneficial if you live in an area with good weather for much of the year or if your home has a nice view. Keep in mind that many older brick homes have historic wood windows that add to the charm of the house. When you install a new window in a brick house, you’ll want to find one that matches the aesthetic of the existing windows.

While windows increase a home’s value, how much they increase it can vary. It depends on the age of the home and the type of windows. You can expect about 70% to 85% return on investment (ROI) when adding a window to your home.

It’s possible to make minor screen repairs yourself using a waterproof adhesive for small tears or a screen patch kit for larger tears and holes. However, it’s usually a better option to call in a professional window technician. It’s very easy to use too much waterproof glue, resulting in a messy appearance that might demand a full replacement anyway. A screen repair technician will not only be able to carry out clean repairs and patches that aren’t obvious, but they can also let you know if replacing your screen is a more cost-effective option.

Most standard windows can accommodate solar screens, but specialty shapes or non-standard frames may require custom solutions. It’s important to consult with a professional to ensure compatibility and proper fit for unique window designs. Arched, bay, and fabricated windows often need fabricated screens, which can increase costs and lead time.

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.