Updated: May 09, 2026
Location and Projects
Address
18480 RIVERSIDE DR, Sonoma, CA, 95476
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O'sullivan Construction
O'sullivan Construction at 18480 RIVERSIDE DR, Sonoma, CA 95476, held a General Contractor license (#1098721) with the California contractors license board with an expiration date of 11-30-2024. We last verified the license was expired on 04-15-2026.
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.
O'sullivan Construction Services
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O'sullivan Construction Contact Information
Phone Number: (707) 317-8596
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Address: 18480 RIVERSIDE DR, Sonoma, CA 95476
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O'sullivan Construction Sonoma
Quality
Alert*
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
*No active license on file. If you are O'sullivan Construction, click “This is My Business” to update your information.
Activity
|
1 project
|
2025 |
|
16 projects
|
2024 |
|
3 projects
|
2023 |
Our building permit records indicate that O'sullivan Construction has worked on at least
20.0 projects over the past 3 years.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Experience
|
4 projects
|
Home Additions |
Analyzing permits over the last 4 years shows that O'sullivan Construction mostly works on
home addition
projects.
Pricing
|
5 projects
|
< $5k |
|
9 projects
|
$5k-$20k |
|
1 project
|
$20k-$50k |
|
2 projects
|
$50k-$100k |
The typical size of their permits is approximately $8,500. This graph shows the distribution of these job values.
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
Building Permits by O'sullivan Construction
This is a sample of this contractor's permits. Click here to access their complete permit history.
To comply with nov 202424456 perform sequenced demolish of (e) retaining wall excavation and pouring of new landscape retaining wall in rear yard of subject property. install guardrail on (e) wooden retaining wall
Valuation:
$60,000
Permit #:
202408148687
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
To comply with nov 202425072 perform sequenced demolish of existing retaining wall. excavation and pouring of new landscape retaining wall in rear yard of subject property. replace in-kind 9e) fence above retaining wall
Valuation:
$40,000
Permit #:
202408148684
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Perform permiation grouting along property line between 3255 sacramento and 3247 sacramento st adjactent to 3150 california st. repair cracks in wall w (n) concrete
Valuation:
$10,000
Permit #:
202405081675
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Perform permiation grouting along property line between 3255 sacramento and 3247 sacramento st adjactent to 3150 california st. repair cracks in wall w (n) concrete
Valuation:
$10,000
Permit #:
202405081673
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Perform sequenced excavation and pouring of new retaining wall in breezeway to allow installation of new lightwells at 1930 12th ave
Valuation:
$50,000
Permit #:
202408017770
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Portion of existing wall to be removed between living room & kitchen 2nd fl. install new beams living room/kitchen area
Valuation:
$5,000
Permit #:
202408027886
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Remove and replace 100 sq. feet uncovered deck located on side of home - like for like - per plans
Valuation:
$8,000
Permit #:
B2022-0427
Status:
final
Fee:
$854
Permit Type:
Residential
Building Type:
N/A
Remove existing deck and railing and replace with same. remove old joist beam decking railings
Valuation:
$12,000
Permit #:
B2023-1127
Status:
final
Fee:
$598
Permit Type:
Residential
Building Type:
N/A
Remove existing deck and replace as same. deck approximately 45 sq. ft. deck is not covered
Valuation:
$8,500
Permit #:
B2024-0350
Status:
final
Fee:
$981
Permit Type:
Residential
Building Type:
N/A
Rev 202205053587- construction of approximately 10 of (n) foundation due to differing site conditions
Valuation:
$2,034
Permit #:
202406285502
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
New motor for (e) sliding gate at (e) parking lot vehicle entrance. addition pedestrian egress gate
Valuation:
$7,800
Permit #:
202309156675
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
86 - prkng garage...
To obtain final inspection for work approved under pa# 2020-1118-9206 2020-1117-9046 2020-1019-6812 all work is complete
Valuation:
$1
Permit #:
202407307585
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Remove existing 100 sq ft side deck and replace with same - not covered - per plans
Valuation:
$10,000
Permit #:
B2023-1413
Status:
final
Fee:
$712
Permit Type:
Residential
Building Type:
N/A
Upper unit 2907: kitchen and bathroom remodel
Valuation:
$50,000
Permit #:
202409170996
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
To obtain final inspection for pa# 202003035959: 202003035959. all work is complete
Valuation:
$60,000
Permit #:
202404059452
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
To obtain final inspection for work approved under pa# 2020-1019-6802 2020-0927-5187 2018-0807-6707
Valuation:
$1
Permit #:
202407307588
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Repair 72 sq ft of dry rot at rear of building per site plan
Valuation:
$2,600
Permit #:
B2023-2421
Status:
final
Fee:
$306
Permit Type:
Residential
Building Type:
N/A
Remove and replace deck as same due to rot deck is approximately 110 sq ft uncovered
Valuation:
$10,000
Permit #:
B2024-1005
Status:
issued
Fee:
$750
Permit Type:
Residential
Building Type:
N/A
Remove existing deck replace as same
Valuation:
$8,500
Permit #:
B2024-0301
Status:
final
Fee:
$980
Permit Type:
Residential
Building Type:
N/A
Replace 3 windows - wui
Valuation:
$6,208
Permit #:
B2022-3045
Status:
final
Fee:
$233
Permit Type:
Residence window ...
Building Type:
N/A
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Avg Project
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Projects
License # 1154844
Sonoma, CA
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Projects
O'sullivan Construction Reviews
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Recent Buildzoom Projects
O'sullivan Construction License info
Inactive License
| License # | 1098721 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Corporation |
- 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 O'sullivan Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 706265 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Corporation |
- 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 O'sullivan Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 393039 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Corporation |
- 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 O'sullivan Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
ALERT*
BuildZoom Score
- How the BuildZoom Score works
- *No active license on file. If you are O'sullivan Construction, click “This is My Business” to update your information.
Bonded
| Bonded Agent | This License Filed A Contractor's Bond With |
| Bond Value | $15,000 |
25
Permits
- Building permit records show that O'sullivan Construction has worked on 25 permitted projects.
O'sullivan Construction Employees
DO
Daniel Joseph O'sullivan
Officer
NO
Nathaniel Jordan Galicia O'sullivan
Officer
NO
Neil Joseph O'sullivan
Rmo / Ceo / Pres
TO
Timothy Michael O'sullivan
Sole Owner