Updated: Apr 20, 2026
Location and Projects
Address
P O BOX 251, Guerneville, CA, 95446
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Dennis O'leary Construction
Dennis O'leary at P O BOX 251, Guerneville, CA 95446, held a General Contractor license (#502177) with the California contractors license board with an expiration date of 12-31-2028. We last verified the license was inactive on 04-19-2026.
Their BuildZoom score is 0 because we haven’t been able to verify an active license. As a result, they’re not ranked in the top 50% of 336,931 California contractors.
If you’re thinking about hiring them, we recommend double-checking their license status with your local licensing authority. Alternatively, use our project planner to be easily matched to qualified, licensed professionals in your area.
Dennis O'leary Services
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Dennis O'leary Contact Information
Phone Number: (707) 632-5504
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Address: P O BOX 251, Guerneville, CA 95446
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Remove rear facade siding windows and doors (all in rear). replace in kind
Valuation:
$50,000
Permit #:
202203018918
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
Add'l cabins grading grading permit use permit use permit amendment (original up: pln1999-00639) & rmd permit to addition 4 cabins & a commons area associated with the djerassi resident artists program facility & a grading permit for 1244 cu/yds of associated grading for the buildings & access
Valuation:
$0
Permit #:
PLN2009-00296
Status:
Approved
Fee:
$10,917
Permit Type:
N/A
Building Type:
N/A
Extend from existing 150 amp service underground to barn new 100 amp panel. convert barn to mushroom processing facility addition storage areas install propane tank (fees by valuation) see plan check 01126
Valuation:
$0
Permit #:
BLD90-2059
Status:
Cancelled
Fee:
$559
Permit Type:
N/A
Building Type:
N/A
Mushroom farm mushroom farm mushroom farm: convert barn to processing rooms addition soil non-dependent greenhouses convert garage to office residential parking moves to barn
Valuation:
$0
Permit #:
ENV90-0014HIST
Status:
Closed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Mushroom farm mushroom farm mushroom farm: convert barn to processing rooms addition soil non-dependent greenhouses convert garage to office residential parking moves to barn
Valuation:
$0
Permit #:
ARC90-0002HIST
Status:
Approved
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Remove sink range refrig range plug cap plumbing for future. demolish partitions electrical etc. (no change in occupancy)
Valuation:
$0
Permit #:
BLD90-1052
Status:
Closed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Illegal 2nd unit building in mezzinine - occupancy changed from dry storage to r-3/b-2
Valuation:
$0
Permit #:
SWN90-1058
Status:
Closed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Convert existing attached garage to office/storage (will include 2 sinks) see p/c 01126
Valuation:
$0
Permit #:
BLD90-2058
Status:
Cancelled
Fee:
$1,029
Permit Type:
N/A
Building Type:
N/A
Construct dry storage warehouse plumbing to surface of floor only. no occupancy
Valuation:
$0
Permit #:
BLD90-1050
Status:
Closed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace the water heater; install a propane heater in the single family dwelling
Valuation:
$900
Permit #:
MIS2000-06195
Status:
Expired Non-Responsive
Fee:
$112
Permit Type:
N/A
Building Type:
N/A
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Dennis O'leary License info
Inactive License
| License # | 502177 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Dennis O'leary at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
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- *No active license on file. If you are Dennis O'leary, click “This is My Business” to update your information.
Bonded
| Bonded Agent | Surety Company Of The Pacific |
| Bond Value | $5,000 |
Dennis O'leary Employees
DO
Dennis Thomas O'leary
Sole Owner