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Top-Rated Addition to existing structure builders in Union - Updated Nov 2026

Avatar for AVSTEP LLC
AVSTEP LLC
5.0(
13
)
Addition to Existing Structure - Build

Serving Union, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Warranties offered

"Anush and his team were absolutely amazing, and our porch turned out better than we expected thanks to his ideas/recommendations. The attention to detail/pride they take in their work truly stand out and far exceeded our experiences with contractors in the past. One of my favorite parts is how much I genuinely love coming home now. It completely changed the look and feel of the front of our house, and every time I pull into the driveway it makes me happy to see it. I will absolutely be recommending AVSTEP to anyone planning renovations or building a home. We already have several more projects planned for our house in the coming months, and without question we’ll be using Anush and his team again. It’s such a great feeling to know we now have a contractor we genuinely trust and can confidently call whenever we need work done. Even our neighbors have been commenting on how beautiful the front of our house looks and what an incredible job they did. Below are the before and after pictures"
Roofing Project
Remodeling - General Project
before
Before
Remodeling - Kitchen & Bathroom Project

+27

Response time1 day
Response rate100%
3 neighbors recently requested a quote
Avatar for CSZ Construction
CSZ Construction
4.6(
69
)
Addition to Existing Structure - Build

Serving Union, NJ and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"My parents and I live in a old brick apartment building in Hoboken that is from the 1880s. The bathroom in our apartment had not been updated since the 1940s. We needed help ASAP. We checked out Cesar s page and wanted to hire him immediately. The reviews speak for themselves. When he came into our apartment to give us a quote we knew that this was contractor we needed to get the job done. Cesar is affordable, friendly, and very accommodating to any issues or concerns you have before starting the project. Two massive issues with our project were that my dad has spinal & walking issues, so we needed the floors clear of all tools and materials at the end of the each day so that father could walk efficiently through the apartment. The other big issue was that we only have 1 bathroom, so Cesar agreed to work with us on pulling the toilet off and on as every day finished so that we did not have to leave our building to use the toilet. Him and his crew are the best and take pride in their work so that owner is happy with the final result. We brought the bathroom down to the bare bones and rebuilt it back up. I worked with him every step of the way to make sure that he needed all materials to get the job done in the time we needed. This project was an intense remodel with some of the hardest demo and substrate materials that an old bathroom can have. He didn t think anything of it. He has veteran experience in the field and this remodel only took 3 weeks. We are very impressed with Cesar s craftsmanship and professionalism and we will be hiring him again for any future interior projects."
 ALL COLUMNS FINISH
OLD DECK
Livinroom
 PAINTING
PREPARING FOOTINGS

+168

Recommended by93%of homeowners
Avatar for Indigo Construction Co.
Indigo Construction Co.
5.0(
24
)
Addition to Existing Structure - Build

Serving Union, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Emergency services offered

"Our experience with Indigo Construction was very pleasing. They recently completed major repairs in our home, and we couldn’t be happier with the experience. The owner, Ryan, was incredibly professional, honest, and easy to work with from start to finish. His communication was excellent, and the quality of craftsmanship was outstanding. Ryan and his team paid close attention to the details and left everything spotless when the job was done. We highly recommend Indigo Construction and will absolutely be using them for all our future projects!"
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 Wise Choice Construction LLC
Wise Choice Construction LLC
4.8(
46
)
Addition to Existing Structure - Build

Serving Union, NJ and surrounding areas

Approved

In business since 2017

Free estimates

Credit card accepted

"I can?t recommend this team enough! They completely transformed my kitchen, and the entire experience exceeded my expectations from start to finish. Our kitchen remodel was about $30,000, and they completed everything in just 3 weeks without sacrificing quality. They were punctual, professional, and kept me informed throughout the entire process. The workmanship is outstanding, the cabinets, countertops, backsplash, lighting, flooring, and every finishing detail came together beautifully. What impressed me the most was their attention to detail and commitment to getting everything right. They kept the work area clean, stayed on schedule, and were always available to answer questions or make adjustments when needed. It?s rare to find a contractor who delivers exactly what they promise, but they did just that."
Deck remodel
Deck remodel
Deck remodel
Deck remodel
Deck remodel

+2

8 neighbors recently requested a quote
Recommended by56%of homeowners
Avatar for Gomez Vision Construction, LLC
Gomez Vision Construction, LLC
4.4(
81
)
Addition to Existing Structure - Build

Serving Union, NJ and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

"Gomez Vision was a great company to work with for our home addition/renovation. The owner was easy to work with, showed up on time, and made the process much smoother - The quality of their work is very good too. He runs a small team and they work very efficiently."
COMPLETE HOME REMODELING
job#387 house renovation
job#391
master bath
hard wood refinishing

+326

Response time3 hrs
11 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for EMILCO Construction, LLC
EMILCO Construction, LLC
4.9(
16
)
Addition to Existing Structure - Build

Serving Union, NJ and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"I am very impressed to deal with Emil . The work went very professional and fantastic eventhough not completely done 100% but I am sure will come beautiful more than we expected. Very seldom now to find someone honest and professional gives advice to save some money and less money for him. Emil is available seven days a week to answer any question or concern. All crew's working from bottom of their heart like this is their own house with using technology tools to do the Job. I can't thank them enough for what they doing so far .they came yesterday very cold weather to do the work, even my neighbors told me that your construction crew's working every single day. I am highly recommended for anyone who is looking to get professional work with reasonable price and enjoy peace of mind because you are in honest hands professional people worry about their reputation and credibility. I will share some pictures of the work done so far Even though not completely finished. Also I was very impressed to hear a comments from tge rough inspectors personal who came to do the inspection stated that we are like to walk in clean job and people know what are doing good. Infact the inspector asked for phone number to recommended for other people. I will share more pictures after the work completely done ✔"
Remodeling - Kitchen & Bathroom Project
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+21

Response time2 days
1 neighbors recently requested a quote
Recommended by100%of homeowners
Ernest & Sons General Contractors
4.1(
23
)
Addition to Existing Structure - Build

Serving Union, NJ and surrounding areas

Approved

In business since 1997

Customers say: Quality work

"It went very well. They are very good. Their timing is great. There have been a couple times when my son was parked in the driveway and we had to reschedule but it was no problem. Every time they come out they make sure everything is done. They are very fast. The service is super!"
Additional Photos
Additional Photos
Additional Photos
7 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Powers Performance Construction LLC
Powers Performance Construction LLC
4.3(
27
)
Addition to Existing Structure - Build

Serving Union, NJ and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"They did an excellent job in our bathroom. Reasonable, professional and quality of work was amazing. I highly recommend this company. I would hire them again. Kept us informed along the way to ensure we got exactly what we wanted. Started job in time and finished in time. Amazing company and very pleasant to work with."
Decks and Porches Project
Remodeling - General Project
General Remodeling Project
Finished Carpentry and Woodworking Project
Gazebo

+53

Response time2 days
Response rate100%
4 neighbors recently requested a quote
Avatar for LIMA CONTRACTING
LIMA CONTRACTING
4.0(
17
)
Addition to Existing Structure - Build

Serving Union, NJ and surrounding areas

Approved

In business since 2000

Free estimates

Warranties offered

"Lionel arrived on time and did an estimate for our project.  I was confident that he knew his stuff and could deliver on the job.  He was very punctual in providing us a verbal estimate then followed it up with a written estimate, which was very appreciated.  In the end, we wound up using someone who was lower priced because we had a lot of items on our wish list and we accepted more risk to our project with the hope that we would be able to get more done in this phase of our remodel.
I would definitely recommend bringing in this company to do an estimate.  For future work I would definitely want to bring them in.
"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+8

Response time2 days
Recommended by100%of homeowners
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FAQs for addition to existing structure building service projects in Union, NJ

You can typically raise your roof by four to eight feet, depending on your home's structure and roof design. The exact amount depends on factors like roof slope and framing support. Raising the roof creates additional interior space, enhances natural light, and increases your home's value. Consult a professional to determine the feasible height increase for your home.

Yes, you need a building permit to raise your roof. Obtaining a building permit ensures your project complies with local building codes and safety regulations. A professional contractor can assist with the permit and inspection process and ensure all legal and safety requirements are met. Your contractor will be familiar with building codes in your area, which can differ between cities or states.

While it's possible to raise a flat roof, it requires extensive structural modifications. Flat roofs lack the attic space and support structures of pitched roofs, so raising them involves significant engineering to ensure safety and durability. This process can be complex and costly, so professional assessment is essential before undertaking a project of this magnitude.

The Union, NJ homeowners’ guide to addition to existing structure building services

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