Serving Mountainside, NJ

General Contractor in Mountainside, NJ

Home additions, renovations, and decks in Mountainside without the stress, delays, or surprise costs. You get a licensed local crew that knows these wooded, hilly lots, transparent pricing, and work that finishes on time.

5-Star Rated
Licensed
Insured
Bonded
Fast Response
Free Estimates
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"After getting multiple quotes, I choose Ultimate Contractors Corp. to replace my patio. They came in and designed the area, helped me with color choices, and most important, they finished ON TIME! The construction crew was professional, clean and courteous."

Joselyne Rivera
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A local team that knows Mountainside

Mountainside does not build like anywhere else, a small Union County borough tucked up against the Watchung Reservation. We know it well after years on its wooded, hilly lots, from the streets along the Reservation to the homes off New Providence Road, so we plan each job around the lot and the house it actually lives in.

  • Built for wooded, hilly lots

    Larger single-family homes here sit on sloped, tree-lined lots, so we plan additions, decks, and patios around grade changes, mature trees, and tight access.

  • Permits and inspections handled

    We pull the borough permits, work out the foundation, drainage, and footing details up front, and coordinate inspections so you are not chasing paperwork.

  • Homes and businesses

    Whole-home renovations and additions for families who plan to stay, plus the storefronts and offices along the Route 22 corridor.

Why Mountainside homeowners choose us

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Local to Mountainside

Our licensed crew covers every Mountainside neighborhood, on site fast when you need us.

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Licensed, Insured & Bonded

A licensed New Jersey general contractor you can trust on site.

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Transparent Pricing

Clear quotes up front, with no surprise charges later.

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On-Time Completion

We plan carefully and finish when we say we will.

Mountainside neighborhoods and nearby towns we serve

Mountainside is part of our Union County footprint, and we cover the whole borough plus the towns all around it.

Across Mountainside

The wooded streets along the Watchung Reservation, New Providence Road, and the neighborhoods that fan back from Route 22.

Springfield

Additions and renovations just up Route 22 to the north. See Springfield.

Union

Home and commercial work across the township next door. See Union.

Union County

The wider county Mountainside belongs to, and every town we cover. See Union County.

Not sure if we cover your block? Call (908) 344-2984 and we will confirm coverage for your address.

What our clients say

A 5.0-star rating from 40+ verified Google reviews across the additions, renovations, and outdoor work many Mountainside lots call for.

"Phenomenal job from concept to creation and implementation. Solid and reliable work finishing on time, on target and on budget. Jeff helped me designed my kitchen. I was on the fence originally because my cabinets were not old. But once completed, I'm glad I replaced it. Definitely increased the value of the property."
Hai
"Excellent service from start to finish. The team was professional, punctual, and paid close attention to every detail. They answered all my questions, kept me updated throughout the project, and delivered high-quality work. It's hard to find contractors you can truly trust, and this company exceeded my expectations. I highly recommend them for anyone looking for reliable and professional contracting services."
SHOP SHERMAINE LLC
"Jeff and the UCC team have been absolutely great. They are very respectful, responsive and they have very fair prices. To start, the UCC team helped remodel my basement. I had a lot of questions about the style, design, color etc and Jeff had nothing but patience with me. He helped answer every question I had and provided great recommendations. In addition to doing my basement, the team helped hang up tv's in my living room and basement. They also helped replace both my front and back doors and install storm doors. Overall, Jeff and the UCC team are extremely professional, helpful, fair and do a phenomenal job. I strongly recommend them to anyone looking for great contractors."
Bodunrin Oluwo
"I cannot recommend them enought. I am a busy person with a family and I had a severe unexpected plumbing issue with my bathroom. I am not a handyman by any means. I started calling companies and they either stopped replying or wanted my to charge me crazy amounts. I was frustrated. I friend recommended me to this place and I am very thankful. They helped me right away and explained me all I needed to know about the price I was been charge. Specifically that guy tommy. He is a man of a few words. However, was really nice and professional. REALLY RECOMMEND THIS PLACE"
Holger Damian Velez Garcia
"After having a sudden water leak and having the whole house fall apart, I found the UCC team and Jeff was very professional from the very beginning. He was very attentive to everything that needs to be done and most importantly he understood my urgency and started working right away. Words can't even explain how grateful I am for the amazing work Yico and Patricio did. I am so happy with the UCC team and their work."
Ismot Tuba
"Jefferson and his crew did a fantastic job on my warehouse in Newark NJ. They are very reasonable and very clean. Highly recommend him and his guys for any type of repair work."
Rd Jets
"Professionally done work and the customer service is just as good as the work done. Jefferson and his crew are experts in their craft and more importantly he will explain to you everything that will be done in the project, and will work with you every step of the way. He accepted a home renovation project of mine and I was impressed by the work done, even with the weather challenges he and his crew had to overcome. Overall 11/10 rating in quality of work, customer service, pricing, everything. Highly recommend to anyone."
Raymond Garcia
"I had a good experience working with Jeff, Tomy and the UCC team for my bathroom remodeling project. From start to finish, their attention to detail were great. They took the time to understand what I wanted and provided valuable insights to enhance the functionality of the space while sticking to our initial budget. Even thought the project took longer than expected they were able to deliver the project with great quality. We are very happy with the results. I appreciate their customer service and their help. I would highly recommend them."
Krina Patel

We serve all of Mountainside

We cover every Mountainside neighborhood and the surrounding area, and we serve clients within about a 45 to 60 minute drive. Give us a call and we will set up a free, no-pressure estimate at your home or business.

Ultimate Contractors Corporation
185 Johnson Ave
Newark, NJ 07108
(908) 344-2984
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Mountainside questions, answered

Do you serve Mountainside, NJ?
Yes, Ultimate Contractors Corporation serves Mountainside, NJ. We cover the whole town, from the wooded streets along the Watchung Reservation to the neighborhoods off Route 22 and New Providence Road, and we can be on site fast when you need us.
Are you a licensed general contractor in Mountainside?
Yes, we are a licensed, insured, and bonded general contractor holding NJ Home Improvement Contractor license #13VH12312800. We handle home additions, renovations, decks, and outdoor projects across Mountainside and the rest of Union County.
Do you build additions and decks on the hilly, wooded lots in Mountainside?
Yes. A lot of Mountainside homes sit on sloped, tree-lined lots, and we are used to planning additions, decks, and patios around grade changes, mature trees, and tight access. We work out the foundation, drainage, and footing details up front so the project stays on schedule.
Do you handle whole-home renovations on larger Mountainside houses?
Yes, we handle whole-home renovations in Mountainside. The borough has many larger single-family homes that owners want to open up, update, or expand, and we manage the kitchen, bath, layout, and structural work under our licensed crew so you deal with one team start to finish.
How fast can you give me an estimate in Mountainside?
We can usually schedule a Mountainside walkthrough quickly and follow up the same business day. Call (908) 344-2984 or request a quote online and we will set up a time to look at your project.
Is the estimate free, and do you offer financing?
Yes, estimates are free, and financing is available so you can start sooner. We will walk your Mountainside project, talk through your goals and budget, and put clear, transparent pricing in writing before any work begins.
Do you pull permits and handle inspections for Mountainside projects?
Yes. For additions, decks, and structural renovations in Mountainside we pull the required permits and coordinate the inspections as part of the job, so the work is done to code and you are not left chasing paperwork with the borough.
How long does a typical Mountainside addition or renovation take?
It depends on the scope, but a bathroom or kitchen often takes a few weeks while a full addition on a wooded lot can take longer once foundation and framing are involved. We give you a realistic schedule in writing up front and work to hold it, with a clean site each day.
25+
Years of Experience
250+
Projects Completed
40+
5 Star Reviews
12
NJ Counties Served

Ready to start your Mountainside project?

Get a free, no-pressure estimate from us. We're a family-owned, licensed New Jersey general contractor - insured, bonded, rated 5.0 stars, with financing available through Wisetack.