Updated: Apr 20, 2026
Location and Projects
Address
P O BOX 1016, Del Mar, CA, 92014
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JW Groswith Custom Building Construction
JW Groswith Custom Building, Del, Po Box 1016, Del Mar, CA (Owned by: Jack Wilson Groswith) holds a General Building license according to the California license board.
Their BuildZoom score of 92 ranks in the top 32% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring JW Groswith Custom Building, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
JW Groswith Custom Building Services
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JW Groswith Custom Building Contact Information
Phone Number: (858) 472-0740
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Address: P O BOX 1016, Del Mar, CA 92014
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Building Permits by JW Groswith Custom Building
This is a sample of this contractor's permits. Click here to access their complete permit history.
Remodel of an existing kitchen removal of existing doors and windows at first floor new doors and windows in new structural openings. new exterior hardscape
Valuation:
$300,000
Permit #:
BLDR-010294-2020
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Single family dwelling addition
Valuation:
$39,727
Permit #:
BLDR-010738-2020
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Engr permit w52467 issued 4/4/05. grading permit for single family residence. also to include pvt. stormdrain pipe, catch basin, stormdrain outlet, driveway, hadrscape and landscaping.originals to m&r for micro key punch,prints distro on 4/5/2005
Valuation:
$0
Permit #:
179810
Status:
Issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Cdp approved by hearing officer on 12/01/04. resolution number ho-4863
Valuation:
$0
Permit #:
124236
Status:
Issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Sdp approved by hearing officer on 12/01/04. resolution number ho-4863
Valuation:
$0
Permit #:
124237
Status:
Issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
La jolla-combo permit for pool & spa add'n to new house pts#64698. sf cdp#124236 & sdp#124237
Valuation:
$5,554
Permit #:
211986
Status:
complete
Fee:
$275
Permit Type:
Acc struct to 1 o...
Building Type:
N/A
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JW Groswith Custom Building Reviews
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Verified License
BuildZoom confirmed this contractor's license
JW Groswith Custom Building License info
Verified License
| License # | 925815 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for JW Groswith Custom Building at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
92
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
JW Groswith Custom Building Employees
JG
Jack Wilson Groswith
Owner