Location and Projects
Granahan Construction
Granahan Construction, 3929 Stanford Dr, Oceanside, CA (Employee: John Daniel Granahan) holds a Contractor license and 1 other license according to the Oceanside license board.
Their BuildZoom score of 102 ranks in the top 11% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Granahan Construction, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Granahan Construction Services
Granahan Construction Contact Information
Granahan Construction Reviews
5 out of 5 stars, based on
6
reviews
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By FpualaJuly 8, 2013
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By SallyJune 9, 2013
We are very excited that the work for our home is finished. Also John and his crew are a blessing to work with. Everyone went above and beyond to make sure we were happy with the work and even contacted us a week after they were finished as a courtesy.
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By MitchJune 6, 2013
I am very pleased with the work completed by Granahan Construction. The process was completed quickly and the entire team was professional, and polite and a pleasure to have in our home.
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By JoeJune 5, 2013
John did exactly what he said he was going to do and within the time frame he gave us. The work was done professionally and he is very conscientious about his work. He even did some touch up painting that was not paid for in the bid because he wanted us to be happy with the end result! We did experience a very significant reduction in noise from the condo above us.
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By StevenMay 28, 2013
Our home has 2 newer apartments attached but we designed the upstairs apartment with wood floors. When our tenant could not take the echoing noise from above, we contacted Granahan Construction. He provided us with studio quality soundproofing,while the price intially seemed high, It saved us from loosing our tenant and the mortgage.
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By Marc R.May 22, 2013
John was wonderful to work with. He was able to squeeze our project into his schedule the same week I signed the contract. We hired John after having difficulty sleeping due to the foot noise in the unit above us, also the weekend party noise we were looking to eliminate. After the initial inspection
Of the master bedroom we knew he was very knowledgeable about the service he provides and the products he uses. John went above and beyond our expectations in the work performed.
Building Permits by Granahan Construction
This is a sample of this contractor's permits. Click here to access their complete permit history.
Granahan Construction License info
Verified License
| License # | 586710 |
| Status | Active |
| City | Oceanside |
| Type | Contractor |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of November 2025.
Verify this license's status for Granahan Construction at the City of Oceanside, CA.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 586710 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of November 2025.
Verify this license's status for Granahan Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
102
BuildZoom Score
Bonded
| Bonded Agent | Hudson Insurance Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
Professional and friendly, did an excellent job with the soundproofing.