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GM1 CONSTRUCTION LLC

Deck or Porch Repair, Commercial Deck or Porch Repair Service,

About us

With over 12 years of experience as a construction, GM1 is who you need to take care of your home. We handle everything from the initial consultation to making sure your property looks perfect every single time. We will always treat your property as we would treat our own, and you will be surprised how simple and easy our team will make the whole process seem. Give our team a call today. We're looking forward to working with you!

Amenities

Free Estimates

Yes

Warranties

Yes

Reviews
5.028 Reviews
Number of StarsImage of DistributionNumber of Ratings
5
100%
4
0%
3
0%
2
0%
1
0%

Filter reviews by service

Showing 1-25 of 28 reviews
Cathy K.
Jan 2026
5.0
Google Review
Jason was excellent. Honest, hard worker and went overboard with the job. Truly appreciate his work and will use again.

Anthony S.
Jan 2026
5.0
Google Review
GM1 is one of the best in workmanship and professionalism, and Jason is a very nice person and a pleasure to deal with. Gm1 responds to calls and texts quickly, their pricing is very fair and they stand by their word. I highly recommend them. Email me if you have questions

Sam E.
Jan 2026
5.0
Google Review
Highly recommend GM1 as they recently did a number of repairs to my roof. Jason was incredibly responsive and thorough. He explained every part of the process and shared before and after photos and videos. The work was done effectively and efficiently and was well priced. Five stars for sure!

Sim V.
Jan 2026
5.0
Google Review
They responded same day in an emergency roof repair. Jason is very honest, knowledgeable and is fair with pricing.

Bill S.
Jan 2026
5.0
Google Review
I had an excellent experience with GM1 Construction. I called the same day our chimney cap was torn off by a bad rain and wind storm the night before, and Jason came out promptly and took care of the problem right away. Jason was professional, straightforward, and clearly knew what he was doing. He reinstalled the chimney cap securely, did quality work, and charged a fair price. There was no upselling or games, just solid work when it was needed most. I would absolutely recommend Jason and GM1 Construction to anyone looking for reliable, responsive, and honest workmanship.

Nilam S.
Dec 2025
5.0
Yes, I recommend this pro
$250
Jason and his associate arrived on time and completed the work for the agreed price of $250. He did a thorough job removing the old, loose mortar from the firebox walls and applying fresh mortar, and he also added insulation at the top of the firebox as promised. Overall, Jason was punctual, professional, and pleasant to work with.

Micah P.
Nov 2025
5.0
$1,600
Everything Johna said he was going to do, he executed perfectly. Got back to us quick and go the job done quick too.

Wallace M.
Aug 2025
5.0
$6,300
I really did my research. I was truly determined to hire professionals who would get the job done right the first time. GM Construction did everything from replacing the roof on my shed to reinforcing a 20 yr old fence. I really appreciate it. Have they worked within my budget and did an efficient job without adding on costs. The extras, the things they really didn’t have to do were appreciated. They built me a new Chimney and determined that a Liner was needed. Reasonable prices really matter. Completion of work in a reasonable timeframe really matters. Friendly and efficient, communication really matters. Skill really matters. GM 1 Construction has it all.

Deborah S.
Jul 2025
5.0
Jason and his crew sealed my 3-season room roof and they also did some repairs to my chimney. I couldn’t be happier with the results. Jason and his crew were professional, punctual and incredibly skilled. I highly recommend GM1 to anyone in need of roofing in need of roofing or chimney services. I can rest easy tonight knowing that my roof will no longer leak. Thank you for a job well done!

Thomas S.
Mar 2025
5.0
$2,400
They showed up on time and did a great job.

Christine F.
Mar 2025
5.0
$1,200
Jason did an excellent job tepairing my Chimney Cap and also did repairs on the Chimney crown. His work was outstanding and I would definitely hire him again if needed. Very professional in on time and cleaned up everything before he left.

Rodney T.
Mar 2025
5.0
GM1 Construction did an excellent job of repairing my driveway retaining wall. I am very satisfied with the job and would hire them again.

Thad R.
Jan 2025
5.0
Yes, I recommend this pro
I am very pleased with their work! And grateful! GM1 saved me, my wife, dog and cat from another cold night in our home. A blocked chimney had shut down our furnace. GM1 responded immediately; began right away; cleared the chimney; replaced the lining; and did it all neatly, carefully and for a reasonable price. Great!

Ted K.
Jan 2025
5.0
Very prompt. Clearly quoted the job and did the work immediately. Highly recommend

Cheryl S.
Nov 2024
5.0
Yes, I recommend this pro
Very professional. Did a great job.

Amanda R.
Nov 2024
5.0
Showed up on time and cleaned the fireplace and made sure everything was working properly up on completion. Highly recommend this company.

Joe N.
Oct 2024
5.0
Yes, I recommend this pro
He did excellent work, projects where completed promptly. I highly recommend him, for masonry , cleaned and stained cedar siding and decks. He is very pleasant to work with. We would definitely hire him for our future needs.

Jean H.
Sep 2024
5.0
Yes, I recommend this pro
$250
Jason came within a couple days with a helper. Cleaned out chimney and replaced cement surrounding top of chimney. Very polite, cleaned up after themselves and accepted all forms of payment . I would highly recommend their services.

Lou C.
Jul 2024
5.0
Yes, I recommend this pro
The pricing on my masonry job was very reasonable, Johnâ s communication was excellent.was always on time for the work and did a good job on cleanup. I would recommend GM1 highly and would use him again.

Jim R.
Jul 2024
5.0
Yes, I recommend this pro
Easy to work with... price was fair... workmanship & communication excellent.

Judith F.
Jun 2024
5.0
Deck or Porch Repair
Yes, I recommend this pro
GM1 is the best came and got the job done totally satisfied.

Debbie P.
May 2024
5.0
Yes, I recommend this pro
$1,600
GM1 Construction is a wonderful company, Gentja did everything I asked him to do. He is pleasant to work with and knowledgeable about decks. He was neat and on time when he said he would be here.

John M.
May 2024
5.0
Yes, I recommend this pro
$250
I needed a power wash for my back patio to flesh out pictures for my house which was being listed. The technician arrived that day with a quote and was willing to work immediately.

German R.
May 2024
5.0
Yes, I recommend this pro
$2,600
They took care about the entire project and I didnâ t have to worry about anything!

Ena G.
May 2024
5.0
Yes, I recommend this pro
This company did a great good. Had no issue at all and I am so satisfied with the work. I highly recommend!
Showing 1-25 of 28

Licensing

Licensed*

Trade License Number

13VH11936500

Trade License Locale

NJ

Trade License Expiration

03/31/2027

State Contractor License Requirements

All statements concerning insurance, licenses, and bonds are informational only, and are self-reported. Since insurance, licenses and bonds can expire and can be cancelled, homeowners should always check such information for themselves. To find more licensing information for your state, visit our Find Licensing Requirements page.

*Contact business to see additional licenses.

FAQ

GM1 CONSTRUCTION LLC is currently rated 5.0 overall out of 5.

Monday: 9:00 AM - 6:00 PM Tuesday: 9:00 AM - 6:00 PM Wednesday: 9:00 AM - 6:00 PM Thursday: 9:00 AM - 6:00 PM Friday: 9:00 AM - 6:00 PM Saturday: 9:00 AM - 6:00 PM Sunday: Closed

Yes, GM1 CONSTRUCTION LLC offers free project estimates.

No, GM1 CONSTRUCTION LLC does not offer eco-friendly accreditations.

No, GM1 CONSTRUCTION LLC does not offer emergency services.

Yes, GM1 CONSTRUCTION LLC offers warranties.