Updated: Jun 18, 2026
Location and Projects
Address
9492 BUFFALO CT, Kelseyville, CA, 95451
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John P Brosnan Construction
Serving the Kelseyville, California area for over two decades, John P Brosnan focuses on residential construction projects. With 21 years of industry experience, Brosnan is known for managing permitting and construction processes for home improvement and renovation work in Lake County. The company’s project portfolio reflects a range of residential property types, including single-family homes, and demonstrates practical knowledge of local building standards and regulations. Homeowners in Kelseyville and neighboring communities rely on Brosnan for guidance through all phases of construction, from initial planning to project completion. As an established contractor with more than two decades of operation, John P Brosnan is a resource for clients seeking residential construction expertise in the Kelseyville area.
John P Brosnan Services
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John P Brosnan Contact Information
Phone Number: (650) 307-4664
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Address: 9492 BUFFALO CT, Kelseyville, CA 95451
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John P Brosnan Kelseyville
Quality
98
84th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
John P Brosnan has a BuildZoom score of 98, which places them above 84% of 336,931 contractors in California.
Activity
|
1 project
|
2025 |
|
2 projects
|
2024 |
|
1 project
|
2023 |
Our building permit records indicate that John P Brosnan has worked on at least
4.0 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.
Pricing
|
1 project
|
< $5k |
|
1 project
|
$5k-$20k |
|
1 project
|
$50k-$100k |
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.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Single family dwelling 1st floor addition for (n) bedroom at rear (190sf). convert (e) bedroom into (n) bathroom and walk in closet. install (n) 150sf deck. total remodel of 190sf. revision #1: revised drawing to change proposed (n) bathroom layout. (issued 4/15/19)
Valuation:
$80,000
Permit #:
BD-2017-263771
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Update kitchen like for like (in-kind)
Valuation:
$15,000
Permit #:
B23-0739
Status:
final
Fee:
$802
Permit Type:
Alterations
Building Type:
N/A
Dryrot repair per markoff pest control report #22527 item #1 at front of building. repair in kind
Valuation:
$1,000
Permit #:
202207057743
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Kitchen update; no walls moving see notes
Valuation:
$13,000
Permit #:
B18-1448
Status:
final
Fee:
$599
Permit Type:
Alterations
Building Type:
N/A
Dry rot repair at rear of building on first floor approximately 10 x 25 area
Valuation:
$6,000
Permit #:
201712015310
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Like for like 1 garden window 125a subpanel
Valuation:
$16,500
Permit #:
BRES2019-143
Status:
final
Fee:
$1,301
Permit Type:
Kitchen remodel_434
Building Type:
N/A
Single family dwelling - rear additions including master bedroom bathroom walk in closet storage room gym 472 sf. remodel interior (88 sq ft) including sliding door at dining living room bay window stucco repair at frames. upgrade electrical panel to 200 amps. new deck 306 sf. pa15-043
Valuation:
$83,000
Permit #:
BD-2015-254329
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
To addition one new bedroom 1 full bathroom and one new laundry/office area at the ground floor
Valuation:
$60,000
Permit #:
202207289519
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Whole house rewire
Valuation:
$2,500
Permit #:
REV18-0368
Status:
triage
Fee:
$81
Permit Type:
Alterations
Building Type:
N/A
Dry rot repair in the rear; siding
Valuation:
$10,000
Permit #:
201701308250
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Residential: full review - additions adu accessory structures pools remodel demolish generators and
2020-05-19
Remodel closet and living room to create office 100 sq ft fire to review and check sprinkler requirements in new office
Valuation:
$8,158
Permit #:
BLD19-03900
Status:
complete
Fee:
$287
Permit Type:
Alteration
Building Type:
N/A
(l4l) bathroom remodel
Valuation:
$7,000
Permit #:
BLD2022-00227
Status:
final
Fee:
$755
Permit Type:
Bathroom remodel
Building Type:
N/A
Interior bathroom kitchen remodel
Valuation:
$100,000
Permit #:
B16-0236
Status:
issued
Fee:
$5,938
Permit Type:
Remodel
Building Type:
N/A
A d d i t i o n o f o n e b e d r o o m r e m o d e l
Valuation:
$70,000
Permit #:
B17-0011
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Repair to 2 water service in row area
Valuation:
N/A
Permit #:
19-0864
Status:
expired
Fee:
$500
Permit Type:
Private
Building Type:
N/A
Dryrot repair to west side of building - entry decks
Valuation:
$3,500
Permit #:
B06-0705
Status:
issued
Fee:
$92
Permit Type:
Alterations
Building Type:
N/A
Replace/repair handrail on rear stair access
Valuation:
$960
Permit #:
B05-0641
Status:
final
Fee:
$37
Permit Type:
Alterations
Building Type:
N/A
Replace wood stairs w/prefab stairs
Valuation:
$5,000
Permit #:
B09-0300
Status:
final
Fee:
$120
Permit Type:
Alterations
Building Type:
N/A
Addition and remodel (50 sq. ft.)
Valuation:
$55,000
Permit #:
B11-0257
Status:
final
Fee:
$4,167
Permit Type:
Remodel
Building Type:
N/A
2025/2026 fiscal year r-2 inspection (6 units)
Valuation:
N/A
Permit #:
F25-1852
Status:
applied
Fee:
$157
Permit Type:
Apartment
Building Type:
N/A
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John P Brosnan License info
Verified License
| License # | 497244 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for John P Brosnan at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 904234 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for John P Brosnan at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 421276 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for John P Brosnan at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 298678 |
| 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 John P Brosnan at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
98
BuildZoom Score
Bonded
| Bonded Agent | Hudson Insurance Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
18
Permits
- Building permit records show that John P Brosnan has worked on 18 permitted projects.
John P Brosnan Employees
JB
John Joseph Brosnan
Sole Owner
JB
John Patrick Brosnan
Sole Owner
PB
Patrick Brosnan
Sole Owner
PB
Patrick Brosnan
Sole Owner
TB
Timothy Patrick Brosnan
Sole Owner