Updated: Apr 21, 2026
Location and Projects
Address
1393 Ogg Dr, Westminster, MD, 21157
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Lawrence Garth Knoch Jr Plumber
Lawrence Garth Knoch Jr, 1393 Ogg Dr, Westminster, MD holds a Plumbers license and 3 other licenses according to the Maryland license board.
Their BuildZoom score of 104 ranks in the top 9% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Lawrence Garth Knoch Jr, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Building Permits by Lawrence Garth Knoch Jr
This is a sample of this contractor's permits. Click here to access their complete permit history.
Commercial plumbing addition alteration permit
2020-08-26
Unit 2 ahh nails & spa install under slab water and sewer to building install plumbing fixtures: 1 - lav 1 - water closet 1 - washing machine conn 2- hand sinks 4 - pedicure chairs 1 - electric water heater 1 - backflow preventer 8 1/2 watts asse 1013 (for pedicure chairs domestic water) *3/24/2021 amendment delete 8 backflow preventers 1/2 watts asse 1013 addition on: 2 backflow prev... see more
Valuation:
N/A
Permit #:
P20003204
Status:
complete
Fee:
$364
Permit Type:
N/A
Building Type:
N/A
Laurel park blvd & seattle slew lane - install 1.5 wilkins 975 xlu rpz (irrigation domestic water) connect water to existing copper piping and install curb valve to backflow
Valuation:
N/A
Permit #:
P20002692
Status:
complete
Fee:
$215
Permit Type:
N/A
Building Type:
N/A
Finish basement rec room storage area and full bathroom
Valuation:
N/A
Permit #:
PLR-21-0609
Status:
approved
Fee:
$60
Permit Type:
N/A
Building Type:
Alterations
Single family dwelling install backflow preventer 3/4 wilkins 375rp for lawn irrigation
Valuation:
N/A
Permit #:
P20003198
Status:
complete
Fee:
$78
Permit Type:
N/A
Building Type:
N/A
Single family dwelling install backflow preventer 3/4 wilkins 375rp for lawn irrigation
Valuation:
N/A
Permit #:
P20003197
Status:
complete
Fee:
$78
Permit Type:
N/A
Building Type:
N/A
Alteration to an existing building install backflow preventer for irrigation to field
Valuation:
N/A
Permit #:
P02287106
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Alteration to an existing building install backflow preventer for lawn irrigation
Valuation:
N/A
Permit #:
P02285014
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Paid by lawrence knoch 3 compartment sink 1 floor sink (no building construction)
Valuation:
N/A
Permit #:
PO-20-0057
Status:
approved
Fee:
$100
Permit Type:
N/A
Building Type:
N/A
Commercial plumbing addition alteration permit
2020-08-28
Suite g barenburg optical install plumbing fixtures: 3 - lav 1 - kitchen sink
Valuation:
N/A
Permit #:
P20003237
Status:
complete
Fee:
$122
Permit Type:
N/A
Building Type:
N/A
Repair water lines install 3/4 backflow preventer for lawn irrigatio n
Valuation:
N/A
Permit #:
P02285780
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Back flow device back flow test
Valuation:
N/A
Permit #:
PLU21-0580
Status:
final
Fee:
$95
Permit Type:
Existing building...
Building Type:
N/A
17 - (nr) - remodeling/additional work/tenant space
2021-02-05
[none] - 9900 stoneybrook dr
Valuation:
N/A
Permit #:
PFG-1284702-2019
Status:
final
Fee:
$306
Permit Type:
N/A
Building Type:
N/A
Cross connection - replace testable w/non-testable
Valuation:
N/A
Permit #:
SFP-1297735-2020
Status:
final
Fee:
$103
Permit Type:
N/A
Building Type:
N/A
Interior renovations
Valuation:
N/A
Permit #:
PLC-21-0987
Status:
approved
Fee:
$120
Permit Type:
N/A
Building Type:
N/A
Cross connection - replace testable bfp
Valuation:
N/A
Permit #:
SFP-1297620-2020
Status:
final
Fee:
$103
Permit Type:
N/A
Building Type:
N/A
Remove 3/4 non-testable 1024 double check bfp; install 3/4 rpz 1013 backflow for existing lawn irrigation
Valuation:
N/A
Permit #:
P02276806
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
New single family dwelling install 3/4 rp backflow for lawn irrigation - wilkins 375
Valuation:
N/A
Permit #:
P18003230
Status:
complete
Fee:
$78
Permit Type:
N/A
Building Type:
N/A
Single family dwelling install backflow preventer for irrigation system - wilkins 720
Valuation:
N/A
Permit #:
P18001609
Status:
complete
Fee:
$78
Permit Type:
N/A
Building Type:
N/A
Paid by lawrence g knoch
Valuation:
N/A
Permit #:
PLC-20-0522
Status:
approved
Fee:
$120
Permit Type:
N/A
Building Type:
N/A
[none] - 7609 glenbrook rd
Valuation:
N/A
Permit #:
PFG-1298070-2020
Status:
final
Fee:
$484
Permit Type:
N/A
Building Type:
N/A
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Lawrence Garth Knoch Jr License info
Verified License
| License # | 6526 |
| Status | Active |
| State | Maryland |
| Type | Plumbers |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Lawrence Garth Knoch Jr at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | MD6526 |
| Status | Active |
| State | Maryland |
| Type | Master Plumbergas Fitter Plumbers |
- When BuildZoom last verified this license, it had an expiration date of July, 2014. Check the current license status of Lawrence Garth Knoch Jr with the Maryland Department of Labor, Licensing & Regulation
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 83750 |
| Status | Active |
| State | Maryland |
- When BuildZoom last verified this license, it had an expiration date of March, 2015. Check the current license status of Lawrence Garth Knoch Jr with the Maryland Department of Labor, Licensing & Regulation
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CON-4677 |
| Status | Inactive |
| City | Annapolis |
| Type | Plumber |
- According to the The City of Annapolis, MD, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Lawrence Garth Knoch Jr at the The City of Annapolis, MD.
This is a sample of licensing data; click here to access a complete history.
104
BuildZoom Score
Insured
| Insurer | State Auto P&C Ins Co |
553
Permits
- Building permit records show that Lawrence Garth Knoch Jr has worked on 553 permitted projects.