ADU Contractor in Newark, NJ
Add a second home on your own lot for parents, adult kids, or rental income. We design and build your accessory dwelling unit as our licensed team, with permits, zoning research, and the full build handled start to finish.
"I had a great experience working with this company. They were punctual, kept clear and consistent communication, and delivered high-quality results. The entire team was professional and efficient. Truly an exceptional team - I would definitely hire them again."
Request your free ADU quote
Tell us about the accessory dwelling unit you want to add and we'll get back to you the same business day with clear next steps.
A second home on the lot you already own
An ADU is a smaller, self-contained home on the same lot as your main house, with its own kitchen, bathroom, and entrance, designed and built the right way by one licensed Newark team. Most owners worry about the same three things. Here is how we take each one off your plate.
- We protect your home
We keep the main house and yard clean and protected while we build your unit, every single day on site.
- On time, as promised
A realistic schedule in writing before we start, updates at every stage, and we hold to it.
- No hidden costs
The full price up front with no surprise fees, plus financing to help you start sooner.
Types of ADUs we build
Our licensed team designs and builds every type of accessory dwelling unit, from a backyard cottage to an income unit carved out of space you already own.
Detached ADUs
A free-standing backyard cottage with its own foundation, utilities, and entrance, the most private option where your lot and zoning allow it.
Garage Conversions
Turn an attached or detached garage into a finished, livable ADU. Reusing the existing structure is one of the most cost-effective ways to add a unit.
Basement & Attic ADUs
Carve a complete unit out of an unfinished basement or attic, with proper egress, ceiling height, insulation, and a full kitchen and bath.
In-Law Suites
A connected or attached in-law suite with a private entrance, perfect for keeping family close while giving everyone their own space.
NJ & Newark ADU zoning and permits
Zoning is the part most people get stuck on, so here is the honest version, and how we take it off your plate.
Zoning is set by your town
New Jersey has no single statewide rule that automatically lets you build an accessory dwelling unit. Whether you can, how big it can be, where it sits, and any extra parking come down to your municipality's zoning ordinance and the district your lot is in.
Allowed, by variance, or restricted
Some North Jersey towns clearly allow ADUs and in-law suites, some allow them only with a variance, and some restrict them, and those rules change from town to town and over time.
We confirm the rules first
Before you commit to a design, we look into your municipality's current zoning and permit requirements up front and tell you plainly what is and is not allowed for your property.
Permits and inspections handled
Once we know what your town allows, we pull the right permits and schedule the inspections so the finished unit is legal and built to code.
We would rather give you a straight answer early than sell you a plan your town will not approve. Call us at (908) 344-2984 to talk through what is realistic for your property.
Quick answers about ADUs
What's included
Zoning and feasibility research, design help, permits and inspections, foundation or structural work, framing, a full kitchen and bathroom, plus electrical, plumbing, HVAC, insulation, drywall, and finishes, a complete self-contained unit under our licensed team.
Best for
Multi-generational families, aging parents, adult children, a private home office or studio, or property owners who want a legal rental unit and added property value.
Typical timeline
A garage, basement, or attic conversion is usually faster than a new detached ADU built from the ground up. We give you a realistic schedule up front and hold to it.
Our design-build process
Free estimate & feasibility
We visit your property, talk through how you want to use the ADU, and research the local zoning so you know what is realistic before you spend a dollar.
Design & permits
We lock the layout, finishes, and timeline, give you clear pricing in writing, then pull the permits and schedule the inspections for you.
Build
Our licensed crew handles structure, kitchen, bath, and finishes, keeps the site clean, and keeps you updated at every stage.
Final walkthrough
We finish on time, pass inspection, and walk the finished unit with you before we call it done.
Why choose us as your ADU contractor
Licensed, Insured & Bonded
A licensed New Jersey general contractor you can trust on site.
Transparent Pricing
Clear quotes up front, with no surprise charges later.
Clear Communication
You always know what is happening and what comes next.
On-Time Completion
We plan carefully and finish when we say we will.
What our clients say
A 5.0-star rating from 40+ verified Google reviews from New Jersey property owners who trusted us with their projects.
"Had a really great experience with Ultimate Contractors Corporation on a new construction project. Everything went super smooth from start to finish, and the quality of the work came out even better than I expected. Jeff and the team are awesome to work with. They know what they're doing, stay on top of everything, and actually care about doing a good job. Communication was easy, they showed up when they said they would, and handled everything the right way. It's hard to find a solid, trustworthy crew, but these guys are the real deal. Definitely recommend them if you want the job done right."
"I hired Jeff and his team to build an addition on my house after considering several companies, and found his to be the most reasonably priced and well-prepared for the project. From start to finish, the team worked tirelessly, listened to all concerns, and made every requested accommodation. Jeff remained accessible and was very communicative any time an issue or question came up. The addition came out terrific, and I would highly recommend Ultimate Contractors Corporation to anyone needing work done on their home."
"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"
"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."
"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."
"I had a great experience working with this company. They were punctual, kept clear and consistent communication, and delivered high-quality results. The entire team was professional and efficient. Truly an exceptional team - I would definitely hire them again."
"UCC have done various projects for my church in 2025. UCC is a reliable and dependable company. Detailed work and walks you through each step. Provides great suggestions when needed. I would definitely recommend UCC as a general contractor to handle all of your household/commercial needs."
"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."
ADU questions, answered
What is an ADU?
Can I build an ADU in Newark, NJ?
How much does an ADU cost in NJ?
Do you handle ADU permits and zoning?
What types of ADUs do you build?
Are you licensed and insured to build ADUs in NJ?
How long does it take to build an ADU?
What areas do you build ADUs in around Newark?
Related services
Planning a bigger project? See all our residential services.
Ready to add an ADU?
Get a free, no-pressure estimate for your accessory dwelling unit from a licensed Newark ADU contractor. Licensed, insured, and bonded, rated 5.0 stars, with financing available through Wisetack.