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    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

5 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

"I had a plain living room wall and wanted to install a electric fireplace with a stone wall accent. I had an idea of what i wanted but didn't have an exact plan etc.. A Condo LLC were professional and very easy to work with especially with some of the changes i made. The tile guy was very detailed and the project came out wonderful!"
Bathroom remodeling
Built in bookshelf
Bathroom remodeling
Before
Bathroom remodeling

+57

Response time3 days
Response rate100%
1 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 Mr. Handyman of S. Orange/Westfield/Scotch Plains & Metuchen
Mr. Handyman of S. Orange/Westfield/Scotch Plains & Metuchen
4.5(
516
)
Doors (Exterior) - Install or ReplaceDoors (Exterior) - Install or Replace - For BusinessDoors (Interior) - Install or Replace+12 more

Serving Mountainside, NJ and surrounding areas

Approved

In business since 2008

Warranties offered

Credit card accepted

"Kassi scheduled our work very promptly and another staff member followed up on the details. Everything went smoothly on the day, and took less time than I expected. John was friendly and efficient -- taking care of business in short order. Replacing the light fixtures by our front door was a little tricky re: the cedar siding, but he effortlessly adapted the installation to the situation. Perfect! The old wooden post mailbox was rotted and barely standing...he took it all away, dug a deep new hole and installed the steel post, using quick setting concrete, and fitted the new mailbox. He even scalped some sod to leave on top... When John was finished, you would have thought the mailbox had always been there. I plan on calling on Mr. Handyman, and John, in the future."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+350

Response time3 days
Response rate100%
2 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

"Cesar does great work. He is reliable, kind and responsive. He replaced my kitchen cabinet doors, he installed my new bathroom: including vanity, medicine cabinet, light fixture, tile flooring, and toilet. All came out perfect. He replaced old closet doors with new bi-fold doors, and he helped with many other details I needed. I will definitely be using him again, I am very happy with everything!"
 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"
4 neighbors recently requested a quote
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Showing 1-10 of 683
Doors FAQs, answered by experts

The vast majority of hinges are symmetrical, and either side of the hinge can go on the door or the frame. Occasionally, you'll find a hinge specifically made for right or left-handed doors with different attachment hardware or larger plates on one side. In most cases, the large side of the hinge goes on the frame.

It is possible to install hinges backward, so be careful when placing them. Position the hinge so that the hinge pin faces the direction the door will swing. For example, if you're standing on the side the door will open into, the pin should be visible. Be extra careful when installing exterior doors, as placing the hinges on the outside for an outward-facing door makes your home much easier to break into.

You put shims between the three-sided frame to which the door hinges are attached and the framing of the rough wall opening. Using shims like this will center your door in the wall opening and allows you to make small adjustments to get your door plumb and level for smooth operation. Your shims and the gap they fill will be covered when you install door trim, so don’t worry too much about the appearance.

The lifespan of your door depends on the door type, its wear and tear, and the weather conditions in your area. For instance, front doors last between 20 and 60 years, depending on the material. Garage doors, on the other hand, last between 15 and 30 years. Interior doors don’t get hit with the elements and can last between 20 and 50 years, if not more. 

An interior French door should last you anywhere between 30 and 50 years, while an exterior French door unit will last around 15 to 30 years on average. Exactly how long your French doors last depends on the quality of the materials you choose, with vinyl doors lasting far less time than fiberglass, metal, and clad-wood doors. Upgrading to shatterproof glass can also improve the lifespan of exterior French doors.

Brickmould isn’t just for doors. It’s used around windows similarly to how it's used around doors. The purpose is to create protection and ward off moisture and insects that could otherwise invade the gap between the frame and the home’s exterior. As with doors, brickmould creates a finished look on the windows and acts as a decorative element.

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.