Updated: Apr 15, 2026
Location and Projects
Address
PO Box 750, Penngrove, CA, 94951
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W Isaak Construction Inc Dba California Builders
W Isaak Construction Inc Dba California Builders, Penngrove, Po Box 750, Penngrove, CA (Employees: Evelyn M Isaak and William Georg Isaak) holds a General Building license and 1 other license according to the California license board.
Their BuildZoom score of 104 ranks in the top 9% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring W Isaak Construction Inc Dba California Builders, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
W Isaak Construction Inc Dba California Builders Services
Start a project today:
Custom Home Build
New Home Construction
Other Residential New Const...
Multi-Room Remodel
Kitchen Remodel
Bathroom Remodel
Basement Remodel
Other Residential Remodel
Pole Barn
ADU
Small Multi-Family New Cons...
Small Multi-Family Remodel ...
Whole Home Remodel
Modular Home Construction
Pool House
Other Secondary Structure N...
Addition
Vertical Addition
Horizontal Addition
Vertical and Horizontal Add...
Attic Remodel
Single Room Remodel
Cosmetic Remodel
W Isaak Construction Inc Dba California Builders Contact Information
Phone Number: (707) 782-9002
Address: PO Box 750, Penngrove, CA 94951
W Isaak Construction Inc Dba California Builders Penngrove
Quality
104
91st percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
W Isaak Construction Inc Dba California Builders has a BuildZoom score of 104, which places them above 91% of 336,931 contractors in California.
Activity
|
2 projects
|
2025 |
|
2 projects
|
2024 |
|
1 project
|
2023 |
Our building permit records indicate that W Isaak Construction Inc Dba California Builders has worked on at least
5.0 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
|
3 projects
|
Home Additions |
Analyzing permits over the last 4 years shows that W Isaak Construction Inc Dba California Builders mostly works on
home addition
projects.
Pricing
|
1 project
|
< $5k |
|
2 projects
|
$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.
Building Permits by W Isaak Construction Inc Dba California Builders
This is a sample of this contractor's permits. Click here to access their complete permit history.
Fire damage repair: damage to living room ceiling smoke damage throughout demolition drywall some ceiling insulation 2 or 3 joists rough framing --minor reframing several ceiling joists rough electrical rough mechanical possibly if ducting needs replace rough plumbing no roof repair no drywall and plaster repair paint
Valuation:
$85,000
Permit #:
B25-2604
Status:
issued
Fee:
$1,592
Permit Type:
N/A
Building Type:
N/A
Acorn chiropractic club tenant improvement to include removing interior walls to create an open space concept addition accessible restrooms addition new ada parking and attached landing. 1, 168 sf of space to be remodeled. wheelchair lift to be permitted under a separate permit. otc dr approved per m sheikhali. 4-9-22 revision: the accessible ramp access aisle and accessible parking h... see more
Valuation:
$110,900
Permit #:
B21-5603
Status:
final
Fee:
$7,909
Permit Type:
N/A
Building Type:
N/A
Bathroom improvement shed improvement - see plans for scope of work. revised scope - 7/26/22 - addition electrical heat & insulation to existing shed
Valuation:
$86,000
Permit #:
BLDG-21-2219
Status:
complete
Fee:
$5,292
Permit Type:
N/A
Building Type:
N/A
Replace kitchen cabinets. outlets updated to code gfci. reuse existing plumbing fixtures and appliances
Valuation:
$12,000
Permit #:
B19-4120
Status:
final
Fee:
$233
Permit Type:
N/A
Building Type:
N/A
Single family dwelling new standby generator installation gas
Valuation:
N/A
Permit #:
BLD25-3407
Status:
final
Fee:
$465
Permit Type:
N/A
Building Type:
N/A
Convert 364 sf attached garage into jadu note: per sb13 - unit can be deemed to meet requirements of in-effect at the time of construction. inspect for newly-added appliances and new work for health & life-safety minimums note: a deed restriction must be recorded prior to final inspection or occupancy
Valuation:
$3,755
Permit #:
B23-3388
Status:
final
Fee:
$2,221
Permit Type:
N/A
Building Type:
N/A
(hsp) for single family dwelling - rebuild (e) decks by replacing deck boards railings and attachment/anchoring to the single family dwelling
Valuation:
N/A
Permit #:
BLD20-4010
Status:
final
Fee:
$812
Permit Type:
N/A
Building Type:
N/A
Remodel 2396 sf single family dwelling convert 275 sf attic to bedroom & 1/2 bathroom revised to eliminate 3rd floor loft
Valuation:
N/A
Permit #:
BLD17-4693
Status:
final
Fee:
$7,029
Permit Type:
N/A
Building Type:
N/A
Remodel single family dwelling
Valuation:
N/A
Permit #:
BLD19-0565
Status:
final
Fee:
$1,409
Permit Type:
N/A
Building Type:
N/A
Replace 3 decks (708 sf total) dry rot repair to siding as needed - not to exceed 40 lf - single family dwelling 4/6/15 addition dry rot repair chimney chase/additional dry rot repair to west and north elevations a little more reair work added 4/6/15 jcherne
Valuation:
N/A
Permit #:
BLD15-0926
Status:
final
Fee:
$928
Permit Type:
N/A
Building Type:
N/A
Remove and replace sidewalk and driveway approach per city standards. sidewalk closure shall be in accordance with attached detail ta-28. preconstruction meeting required prior to work in city r/w. contact bob oller 543.4610 for meeting
Valuation:
$0
Permit #:
EP13-0200
Status:
ISSUED
Fee:
$452
Permit Type:
N/A
Building Type:
N/A
Bathroom renovation- remove all fixtures to remove all tile (floor and shower walls) remove tub and cap off plumbing. replace all drywall with densboard. remove and replace damaged members in walls and floor as required. (possibly remove and replace gas water heater in adjacent space) note: call for inspection after demolition
Valuation:
N/A
Permit #:
B10-3008
Status:
final
Fee:
$264
Permit Type:
N/A
Building Type:
N/A
Complete bld16-2719 - foundation repair/replacement retaining wall partial floor joist replacement - single family dwelling @ 45%
Valuation:
N/A
Permit #:
BLD19-4958
Status:
final
Fee:
$746
Permit Type:
N/A
Building Type:
N/A
Repair and replace exterior stucco and foundation all same for same (historic district). ok to issue permit per steve sparacio. subject to field inspection for plans
Valuation:
N/A
Permit #:
B13-5046
Status:
final
Fee:
$359
Permit Type:
N/A
Building Type:
N/A
Kitchen cabinet replacements - new countertops sink faucet confirm/correct wiring to current code - no plans required
Valuation:
N/A
Permit #:
B15-1619
Status:
final
Fee:
$198
Permit Type:
N/A
Building Type:
N/A
Kitchen remodel and bathroom sink replacement with other misc repairs including new wiring throughout in duplex units 803 wheeler st and 390 hendley st
Valuation:
N/A
Permit #:
B14-2937
Status:
final
Fee:
$507
Permit Type:
N/A
Building Type:
N/A
Bathroom remodel
Valuation:
N/A
Permit #:
BLD19-3696
Status:
final
Fee:
$1,247
Permit Type:
N/A
Building Type:
N/A
Demolish and replace wood retaining wall with masonry block wall in rear yard
Valuation:
N/A
Permit #:
B15-1817
Status:
final
Fee:
$157
Permit Type:
N/A
Building Type:
N/A
Remodel kitchen & bathroom - no altered walls
Valuation:
N/A
Permit #:
BLD15-2662
Status:
final
Fee:
$389
Permit Type:
N/A
Building Type:
N/A
Repair/replace building sewer on property only. sl & x required beyond pl. backwater valve may be needed. call pwa inspection prior to start: 510-238-3651
Valuation:
N/A
Permit #:
SL1000541
Status:
final
Fee:
$407
Permit Type:
N/A
Building Type:
N/A
W Isaak Construction Inc Dba California Builders Reviews
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Verified License
BuildZoom confirmed this contractor's license
W Isaak Construction Inc Dba California Builders License info
Verified License
| License # | 753653 |
| 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 W Isaak Construction Inc Dba California Builders at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 718285 |
| 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.
Check this license's status for W Isaak Construction Inc Dba California Builders at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
104
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Everest National Insurance Company |
29
Permits
- Building permit records show that W Isaak Construction Inc Dba California Builders has worked on 29 permitted projects.
W Isaak Construction Inc Dba California Builders Employees
EI
Evelyn M Isaak
Officer
WI
William Georg Isaak
Rmo / Ceo / Pres