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Find Addition to existing structure builders in Warren

Angi Approved
In business since 2014
Free estimates
Warranties offered
"After meeting with multiple contractors to renovate our historic house, we chose WA construct.Their team of professionals took complete care of the entire project from start to the end and we were very happy with the high quality of their work. We highly recommend them for your next home construction project."
Angi Approved
In business since 2024
Free estimates
Customers say: Quick response
"They have provided very high quality work & very transparent with cost. They are very competitive and client friendly."

Angi Approved
In business since 2009
Free estimates
Warranties offered
"Sovereign Homes brought our vision to life! We added a primary suite to our home, replacing an existing crawl space attic. Rey helped us step-by-step throughout the project. We appreciated his clear communication and efforts with the town and the contractors. We love the luxurious addition to our home!"

Angi Approved
In business since 2018
Free estimates
Customers say: Quick response
"I gave this man $3000 which was 33% of the job upfront. Was supposed to give him 33% at the halfway part And 34% upon completion. But when I went to my bathroom and realized you left drugs in my bathroom and I have small children. Not like that 3000 black and small cleaners caught easy and heâ s lucky he hasnâ t been charged with nothing. Only reason that happened is because I wouldnâ t pursue charges. He obviously is a drug addict and has a problem so maybe he should get help Possibly isnâ t the option maybe rehab is. If you paid for supplies, you got ripped off wait 10 years and it will all fall apart charges for certain stuff but buys different stuff so he can use the extra money to pick himself up drugs without nobody noticing, I am so terribly in grief over this. $3000 he ran off with how is Matt doing in business and not in a jail cell"

Angi Approved
Super Service Award Winner
In business since 2007
Free estimates
Warranties offered
"Roberto and his team helped us select, paint, and install a large custom french door for our home office. Roberto understood our vision, made the process simple, and handled the project efficiently. Roberto was quick to respond, and showed up exactly when he said he would to make sure his team was on time and understood what we wanted. We are so happy with the way the door came out, and highly recommend Roberto and his team at Monk's."

Angi Approved
Super Service Award Winner
In business since 1999
Free estimates
Warranties offered
"Galaxy construction did a awesome job on replacing my porch. Ed listened to what I wanted done, and did it. Every one that worked on the porch were very nice and did a great job."

Angi Approved
In business since 2010
Free estimates
Customers say: Quality work
"Everything the building concepts did for me from beginning to end was exactly what they said was going to happen before signing the contract. I am more than pleased, and I will highly recommend them."

Angi Approved
In business since 2011
Free estimates
Warranties offered
"Amazing work on my second floor addition. Professionals , fast, and great quality work and clean finishes! Everything came out as discussed and the process was very smooth and clean. Reliable company and I recommend them for any home project! Best of luck!"

Angi Approved
In business since 2000
Free estimates
Warranties offered
"Great, a little slow on timing but overall great work"
The Warren, 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.

Planning a home addition? Discover what to expect during the process, including design choices, permits, construction timelines, and key factors that impact your project’s success.

Looking to vault a ceiling? Here’s how much it costs, what factors affect cost, and what to expect.

Discover how much porcelain countertops cost to install based on factors such as their size, materials, add-ons, and local labor rates.

Budget for bedroom remodel costs based on factors such as bedroom size, remodel type, features, materials, labor, and more.

Use this guide to budget for kitchen island costs, including island style and shape, customizations, countertop options, professional labor, and more.

Budget for sunroom addition costs based on factors such as room type, site prep, professional labor, features, permits, prefab vs. custom designs, and more.
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