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  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon335
    Verified door services reviews

Top-Rated Door pros in Mountainside - Updated Nov 2026

Avatar for Monk's Home Improvements Inc.
Monk's Home Improvements Inc.
4.7(
600
)
Doors (Exterior) - Install or Replace

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

2 neighbors recently requested a quote
Recommended by92%of homeowners
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

"We have had them come out and do a couple of things at our home. Most recently they installed a ceiling fan/light combination in a bedroom. In the past they have shaved some doors (after flooring remodel), fix a shower door, and did some light painting. They are very reliable, punctual, and did a nice job with all of the tasks they performed. We will continue to have them back in the future. They are great!"
Bathroom remodeling
Built in bookshelf
Bathroom remodeling
Before
Bathroom remodeling

+57

Response time3 days
Response rate100%
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 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%
3 neighbors recently requested a quote
Avatar for AMS Home Improvements, LLC
AMS Home Improvements, LLC
4.8(
100
)
Doors (Exterior) - Install or ReplaceDoors (Interior) - Install or Replace

Serving Mountainside, NJ and surrounding areas

Approved

In business since 1996

Free estimates

Warranties offered

"Very pleased with the new deck and patio door installation. Armando and AMS team did all the work on time and to our specifications. I am bumping AMS up to five starts for Armando's responsiveness and attention to detail. Nights or weekends, Armando always made time for us and was always responsive to our questions and concerns. A+++"
AMS
AMS Home Improvements
AMS Home Improvements
AMS Home Improvements
AMS Home Improvements

+38

Response time1 day
2 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for CSZ Construction
CSZ Construction
4.6(
69
)
Doors (Exterior) - Install or ReplaceDoors (Exterior) - Install or Replace - For BusinessDoors (Interior) - Install or Replace+11 more

Serving Mountainside, NJ and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"We have hired Cesar and his team for several jobs now, and wouldn't consider anyone else. From first contact to the completed project, we were impressed. After having some bad experiences with contractors it was such a relief to find a team of professionals. Not only do they complete the project, but they went above and beyond. For instance, while shoring up our main staircase, Cesar fixed a door that never closed right, now almost a year later it still closes! The projects we hired him for were to replace loose tiles in our tub/shower and fix the faucets as well. Just yesterday they finished removing tile and carpet from our kitchen, hallway and bathroom. They also installed a combination of vinyl plank flooring, tile and a bathroom vanity. The job took only 2 days. Overall Cesar and his team worked quickly and efficiently, in a timely manner and they cleaned up afterward. I highly recommend this operation."
 ALL COLUMNS FINISH
OLD DECK
Livinroom
 PAINTING
PREPARING FOOTINGS

+168

Recommended by93%of homeowners
Avatar for NJ Window Experts LLC
NJ Window Experts LLC
4.9(
10
)
Sliding Door - Install

Serving Mountainside, NJ and surrounding areas

Approved

Free estimates

Warranties offered

Small jobs welcome

"I had a few things that I wanted done it all started with one bedroom window, five new window shutters and a front door shutter. The house being 41 years old needed a face lift. I also had them repair the front doorstep / sill. Family company that has a great crew and was able to complete everything in one day, I couldn't have been happier with the results and my wife is very happy to have all these repairs done. I highly recommend them and will use them in the future for other repairs"
5 neighbors recently requested a quote
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Doors FAQs, answered by experts

The L marking on a door closer stands for latch speed and the S marking stands for swing speed. These two letters inform what part of the door closer you may be adjusting. The latch speed being the short final swing the door makes before closing and the swing speed being the long swing of the door when closing.

A door frame is typically 2 to 2.5 inches wider than the door. This additional space accommodates the door jamb and hinges and allows for necessary installation adjustments. For example, if the door is 30 inches wide, the rough opening should be 32 to 32.5 inches wide to ensure a proper fit and smooth operation.

Soft-close hinges are worth it if the benefits are a top priority. The biggest benefit of soft-close hinges is that they reduce stress on the cabinet frames, and extending the longevity of these pricey furnishings is a worthwhile investment. Plus, fixing noisy kitchen cabinets helps protect kids with careless fingers, reduces marks on the frames, and creates a quieter living space.

Yes, professionals can install eco-friendly exterior doors made from sustainable materials such as bamboo or reclaimed wood. Additionally, doors with energy-efficient insulation, low-VOC finishes, and high-performance glazing contribute to a more sustainable home environment, reducing energy consumption and minimizing ecological impact.

Sometimes, these two terms are used interchangeably, but they are separate parts of a door, and each serves a different function. The sill helps ensure the doorframe is secure, and the threshold helps protect the sill and direct water away from the door to prevent leaks.

The Mountainside, NJ homeowners’ guide to door services

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