Updated: Apr 06, 2026
Location and Projects
Address
319 W WALNUT AVE, Monrovia, CA, 91016
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Mark Christopher Ong Construction
Mark Christopher Ong at 319 W WALNUT AVE, Monrovia, CA 91016, held a General Contractor license (#849728) with the California contractors license board with an expiration date of 11-30-2028. We last verified the license was inactive on 04-05-2026.
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.
Mark Christopher Ong Services
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Mark Christopher Ong Contact Information
Phone Number: (213) 924-4949
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Address: 319 W WALNUT AVE, Monrovia, CA 91016
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Kitchen and bathroom remodel combined with electrical and plumbing for residential buildings (no structural changes). replace drywall (no new walls added) for single family dwellings and duplex only
Valuation:
$15,000
Permit #:
18016-30000-08809
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental to permit 18016-30000-07594 to addition to the (e) s.f.d
Valuation:
$56,307
Permit #:
18016-30001-07594
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental to 18016-30000-07594 revise floor plan; revision change laundry room to powder room and powder room to laundry room. comply with department order effective date 02/01/2018. permit will expire 30 days from issuance date
Valuation:
$501
Permit #:
18016-10003-07594
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Kitchen/bathroom (2) remodel for residential buildings (no structural changes). replace drywall (no new walls added) for single family dwelling
Valuation:
$30,000
Permit #:
18016-20000-24242
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental permit to #18016-30000-07594 for (1) door change-out (same size & type) for residential buildings. re-stucco (no new walls added) for single family dwellings and duplexes only
Valuation:
$2,000
Permit #:
18016-30006-07594
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental to permit #: 18016-30000-07594 revise detail #10 on sheet s-2 to field condition. change header at exterior door of new addition from 4 x 6 to 4 x 12
Valuation:
$501
Permit #:
18016-10004-07594
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental permit to 17014-30000-03585 to include small 1-story addition at rear of dwelling and update structural inventory to include rfa addition
Valuation:
$3,000
Permit #:
17014-10001-03585
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental to permit #: 18016-30000-07594 to remove porch in front (112 sf) comply with department order effective date 02/01/2018. permit will expire 30 days from issuance date
Valuation:
$1,500
Permit #:
18016-10005-07594
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Change work description to read upgrade 200 amp service relace switches and outlets
Valuation:
N/A
Permit #:
18041-20001-30697
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental to permit 17014-30000-03585 for minor revision to floor plan
Valuation:
$10,000
Permit #:
17014-10002-03585
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Panel upgrad install new plugs and lights
Valuation:
N/A
Permit #:
18041-30000-11160
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Install 2 lights and 4 plugs
Valuation:
N/A
Permit #:
18041-30000-32399
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Interior remodel of existing house (sfd) remodel of kitchen & bathrooms; reconfigure floor plan for one additional bedroom; removal of three interior walls & installation of new beams in kitchen & bedroom; voluntar foundation upgrade by underpinning portion of (e) foundation
Valuation:
N/A
Permit #:
12016-10000-22003
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Single family dwelling addition of 453 sq. ft. trash to be self haul and athens 888 336 6100. 11/25/2013 revision to change electrical fixture counts and addition hvac. 11/26/13 new slab for 17ft x 27.5ft 01/21/14 retaining wall of 32in x 26ft-6in and relocation of air conditioning. 04/17/2014 revision for screen mechanical on roof
Valuation:
$52,355
Permit #:
B13-0743
Status:
final
Fee:
$3,279
Permit Type:
N/A
Building Type:
N/A
Replace drywall units #2 & 3 (no new walls added). window (23) change-out units #1-5 (same size and type) for residential buildings. dual glazing labeled and certified by national fenestration rating council (nfrc) is required for doors and windows replaced in all residential buildings three stories or less per section 152(b) of title 24. no structural changes. valuation to be verifie... see more
Valuation:
N/A
Permit #:
12016-20000-06131
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Supplemental permit to collect fees for (1 ) additional inspection. this permit does not authorize any additional work or extend the expiration date of the original permit
Valuation:
N/A
Permit #:
12042-10001-19737
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Changed to new contractor building permit fees paid under bl1111220036 for an addition
Valuation:
$73,000
Permit #:
1208080031
Status:
N/A
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Kitchen/bathroom (3 ) remodel for residential buildings (no structural changes)
Valuation:
$30,000
Permit #:
18016-20000-19901
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Change out (6) windows. kitchen and bathroom remodel seal windows walls. change out fixtures relocate washer *carbon monoxide alarms/smoke alarms are required for this project per 2010 crc section r314/r315
Valuation:
$7,800
Permit #:
B13-0744
Status:
final
Fee:
$1,006
Permit Type:
N/A
Building Type:
N/A
Voluntary seismic upgrade to existing apartment including new shear panels hold-downs and anchor bolts
Valuation:
$2,000
Permit #:
13016-10000-03670
Status:
issued
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
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Mark Christopher Ong License info
Inactive License
| License # | 849728 |
| 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 Mark Christopher Ong at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
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Bonded
| Bonded Agent | Suretec Indemnity Company |
| Bond Value | $15,000 |
33
Permits
- Building permit records show that Mark Christopher Ong has worked on 33 permitted projects.
Mark Christopher Ong Employees
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Mark Christopher Ong
Owner