Location and Projects
the J Hammer Construction
We are a General B construction company dedicated to building lasting relationships with our clients through trust, transparency, and reliability. Our team takes pride in delivering honest, high-quality workmanship on every project, no matter the size or scope. We believe clear communication and integrity are the foundation of successful construction experiences. From start to finish, we are committed to exceeding expectations and bringing our clients’ visions to life.
From BuildZoom: the J Hammer, 5460 White Oak Ave, Los Angeles, CA (Employees: Guy Portal, Guy Portal, and Robert Winters Brown) holds a General Building license according to the California license board.
Their BuildZoom score of 105 ranks in the top 8% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring the J Hammer, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
the J Hammer Services
the J Hammer Contact Information
the J Hammer Reviews
5 out of 5 stars, based on
10
reviews
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By Linda W.February 23, 2021Remodel a Kitchen$42,000
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By Paul J.February 21, 2021Bathroom remodel$12,000
I went with The J Hammer on a small project my master bathroom remodel and they did an excellent work, took it very seriously, listened to my requests and kept the costs within my budget. I really like how my bathroom turned out, beautiful modern design and high quality materials. One of the best contractors I worked with and will hire them again!
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By Morgan R.February 20, 2021Remodel a Bathroom$15,000
I already worked with JHammer and I knew they are reliable company so I contacted them to see their offer on my bathroom remodel. They gave me very competitive price and were also available in very short time so there were no reasons to not hire them. The project started on scheduled date, went smooth and was finished on time. The project manager was very professional, communicative and helpful. He informed me about working progress all the time. The bathroom turned out great, very beautiful and functional. Excellent contractor!!
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By Joe H.February 19, 2021Install A/C System$9,000
I went with The J Hammer on my basement remodel. My basement was old and it needed a complete remodeling. The project started soon after we signed a contract. The project manager and his crew did a brilliant work, respected my requests and kept costs within my budget. my new basement is fully functional now. Strongly recommend this company!
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By Richard S.February 16, 2021Bathroom remodel$38,000
I went with The J Hammer on remodeling my two bathrooms. I wanted totally different design for each bathroom and the project manager completely understood what I requested. The project went without any issues because J Hammer team was very professional, disciplined and efficient. My bathrooms turned out exactly as I wanted to look like and I am very thankful to The J Hammer!
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By Tony B.February 13, 2021Room Addition$75,000
The project they did is a room addition. The J Hammer team was highly professional, fast, and thorough. They made this complicated project pretty simple and easy although it wasn't at all. They did everything as they promised at the start and they kept the costs within my budget. I am super satisfied with the results and I would recommend using The J Hammer on any small or large demo project.
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By Dave F.February 9, 2021ADU Garage Conversion$75,000
I hired them for a difficult and complicated project, ADU Garage Conversion, big project and big responsibility so I was very careful while I was looking for a reliable contractor. The J Hammer Construction gave me several options, most detailed answers and best quality-price ratio. The project started on time, went smooth and finished within scheduled time. I am very satisfied with the outcome and will highly recommend J Hammer to people I know.
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By Carolina R.February 3, 2021Remodel a Bathroom$15,000
Very trustworthy contractor! I hired JHammer Construction to renovate my master bathroom. I wanted something special and this contractor completely understood what I wanted. The project went smoothly, was finished ahead of schedule and within my budget. They used a high quality materials and my master bathroom is hilarious! I can't ask for more!
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By Kent S.February 2, 2021Remodel a Basement$26,000
I received a 5 quotes on my basement remodel and the best offer came from The J Hammer Construction so I went with them. The project started on time, they were professional, clean and efficient. There were no issues and they did a great job. My new basement looks fantastic and it's much more functional now. I will strongly recommend The J Hammer Construction.
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By Jack W.January 30, 2021Room addition$80,000
I hired JHammer construction on a room addition. It was a big project but also a great decision. They did an excellent job, everything as I requested, kept costs within my budget and finished within their promised time. The outcome is excellent, I am completely satisfied and will highly recommend The JHammer Construction to all people I know!
This is a sample of this contractor's permits. Click here to access their complete permit history.
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the J Hammer License info
Verified License
| License # | 1045849 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Corporation |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for the J Hammer at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
105
BuildZoom Score
Bonded
| Bonded Agent | State National Insurance Company Inc |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
7
Permits
- Building permit records show that the J Hammer has worked on 7 permitted projects.
I was looking for a reliable contractor on my kitchen remodel. After I interviewed many of them I decided to go with The J Hammer. They gave me best price-quality ratio. The J Hammer team shoved up on time. They were great from start to finish of the project. They informed me about working progress all the time and they finished project on time. My new kitchen is fantastic! I will recommend this contractor to friends and neighbors!