Updated: May 14, 2026
Location and Projects
Address
22741 SOUTH CANADA COURT, El Toro, CA, 92630
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Williamson & Son Construction
Williamson & Son Construction at 22741 SOUTH CANADA COURT, El Toro, CA 92630, held a General Contractor license (#511799) with the California contractors license board with an expiration date of 06-30-2021. We last verified the license was expired on 03-25-2026.
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.
Williamson & Son Construction Services
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Williamson & Son Construction Contact Information
Phone Number: (714) 296-6216
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Address: 22741 SOUTH CANADA COURT, El Toro, CA 92630
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Building Permits by Williamson & Son Construction
This is a sample of this contractor's permits. Click here to access their complete permit history.
Commercial mechanical permit - 1, 756 sq ft tenant improvement to change use from retail to outpatient primary care clinic with bld19-00264 (1) 4-ton air conditioning unit (4) exhaust fans per approved plans
Valuation:
N/A
Permit #:
MEC19-00087
Status:
complete
Fee:
$419
Permit Type:
N/A
Building Type:
N/A
Reference mec19-00087: no longer removing and replacing air conditioning using existing w new duct work as per approved plans
Valuation:
N/A
Permit #:
MIS-2019-0658
Status:
issued
Fee:
$160
Permit Type:
N/A
Building Type:
N/A
Commercial electrical permit - 1, 756 sq ft tenant improvement to change use from retail to outpatient primary care clinic with bld19-00264 (45) outlets (15) switches (33) fixtures (1) 200 amp service main (1) 150 amp subpanel (1) 5-hp motor per approved plans
Valuation:
N/A
Permit #:
ELE19-00354
Status:
complete
Fee:
$435
Permit Type:
N/A
Building Type:
N/A
Commercial building permit - 1, 765 sq ft tenant improvement to change use from retail to medical outpatient primary care clinic. to include waiting room reception exam rooms storage rooms and staff room. mechanical electrical and plumbing on separate submittals per approved plans
Valuation:
N/A
Permit #:
BLD19-00624
Status:
complete
Fee:
$3,788
Permit Type:
N/A
Building Type:
N/A
T/i- convert 380sf (e) retail space to medical clinic for province medical group. interior work only non-structural. includes electrical plumbing mechanical
Valuation:
$38,000
Permit #:
19-3875
Status:
final
Fee:
$2,960
Permit Type:
N/A
Building Type:
N/A
Interior demolition of ceilings non-bearing walls new non-bearing walls customer counters suspences ceiling lighting & bathroom (no new floor area) - revision to approved plans - revise building landing @ door and accessible counter - approved by zaheer - no charge - 10/30/01
Valuation:
$35,000
Permit #:
BLD2001-00628
Status:
Final
Fee:
N/A
Permit Type:
General
Building Type:
N/A
Prefabricated modular trailer for fedex aircraft maintenance. new modular unit rqrd due to relocation by jwa from existing location on airport propert
Valuation:
$145,393
Permit #:
NR090128
Status:
Closed-Complete
Fee:
$4,021
Permit Type:
N/A
Building Type:
N/A
1872 s.f. tenant improvement. * misc partition walls * misc electrical outlets * electrical for new counter receptacles
Valuation:
N/A
Permit #:
B0401004
Status:
FINALED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Construct additional door to storage area and full height fencing within storage area
Valuation:
$10,000
Permit #:
B0705302
Status:
final
Fee:
$826
Permit Type:
N/A
Building Type:
N/A
Tenant improvement. 2500 s.f. n/b walls clg & ltg
Valuation:
$112,500
Permit #:
B0278-07
Status:
ISSUED
Fee:
$2,405
Permit Type:
Additions and alt...
Building Type:
N/A
Office tenant improvement electrical fixtures/outlets/switches building approved by lam nguyen
Valuation:
$5,967
Permit #:
00318406-EBP
Status:
final
Fee:
$71
Permit Type:
N/A
Building Type:
N/A
Tenant improvement. 936 s.f. addition shwers refurb exist restrooms new fixtures ltg
Valuation:
$15,000
Permit #:
B0418-08
Status:
ISSUED
Fee:
$763
Permit Type:
Additions and alt...
Building Type:
N/A
Office tenant improvement mechanical outlets/grilles building approved by lam nguyen
Valuation:
$5,967
Permit #:
00318407-MBP
Status:
final
Fee:
$71
Permit Type:
N/A
Building Type:
N/A
Installation of a truck dock facility mechanical pumps and cables control power and 4 light standards and electrical
Valuation:
N/A
Permit #:
B200403751
Status:
final
Fee:
$1,499
Permit Type:
Miscellaneous
Building Type:
N/A
Electrical for t.i. at federal express lobby
Valuation:
$0
Permit #:
E0601956
Status:
Final
Fee:
$135
Permit Type:
N/A
Building Type:
N/A
Electrical to provide power for the trailer.
Valuation:
$0
Permit #:
EL090352
Status:
Closed-Complete
Fee:
$315
Permit Type:
N/A
Building Type:
N/A
Construct additional door to storage area and full height fencing within storage area
Valuation:
$10,000
Permit #:
B0705302
Status:
final
Fee:
$826
Permit Type:
N/A
Building Type:
N/A
Tenant improvement new walls ltg clg new furniture
Valuation:
$0
Permit #:
B0304-08
Status:
ISSUED
Fee:
$61
Permit Type:
Additions and alt...
Building Type:
N/A
Plumbing for water and sewer connection.
Valuation:
$0
Permit #:
PB090120
Status:
Closed-Complete
Fee:
$565
Permit Type:
N/A
Building Type:
N/A
Minor alter. to exist. occup. - remove wall
Valuation:
$108
Permit #:
NR990151
Status:
Closed-Complete
Fee:
$51
Permit Type:
N/A
Building Type:
N/A
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Williamson & Son Construction Reviews
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Williamson & Son Construction License info
Inactive License
| License # | 511799 |
| 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 Williamson & Son 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 # | 820314 |
| 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 Williamson & Son 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
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- *No active license on file. If you are Williamson & Son Construction, click “This is My Business” to update your information.
Bonded
| Bonded Agent | Wesco Insurance Company |
| Bond Value | $15,000 |
25
Permits
- Building permit records show that Williamson & Son Construction has worked on 25 permitted projects.
Williamson & Son Construction Employees
KW
Kathy Ann Williamson
Officer
RW
Rick Alan Williamson
Rmo / Ceo / Pres