Updated: Apr 21, 2026
Location and Projects
Address
Westminster, MD, 21158
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David Keith Kolper Plumber
David Keith Kolper, Westminster, MD holds a Plumbers license according to the Maryland license board.
Their BuildZoom score of 98 ranks in the top 16% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring David Keith Kolper, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
David Keith Kolper Services
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David Keith Kolper Contact Information
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David Keith Kolper Westminster
Quality
98
84th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
David Keith Kolper has a BuildZoom score of 98, which places them above 84% of 58,058 contractors in Maryland.
Activity
|
15 projects
|
2025 |
Our building permit records indicate that David Keith Kolper has worked on at least
15.0 projects over the past year.
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
|
14 projects
|
Plumbing projects |
Analyzing permits over the last 4 years shows that David Keith Kolper mostly works on
plumbing project
projects.
Pricing
|
3 projects
|
< $5k |
|
1 project
|
$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.
This is a sample of this contractor's permits. Click here to access their complete permit history.
This is a loan grant carpentry: kitchen left interior window wall & ceiling: 1 disconnect faucet water supply & waste lines to sink 2 disconnect remove & salvage garbage disposal to reinstall 3 remove & dispose existing countertop w/faucet & sink wall and base cabinets only on left wall 4 remove & dispose (15’l x 8’h) of existing water damaged drywall insulation & rotted wall studs @ ... see more
Valuation:
$65,000
Permit #:
BRCM-25-009977
Status:
complete
Fee:
$393
Permit Type:
Interior alterati...
Building Type:
N/A
Replace water service install pressure reducing valve plumbing only
Valuation:
N/A
Permit #:
BRCM-25-008797
Status:
complete
Fee:
$52
Permit Type:
Interior trades only
Building Type:
N/A
Replace water piping throughout house. replace water supply. this project is through the city loan grant program
Valuation:
$3,000
Permit #:
BRCM-25-016907
Status:
triage
Fee:
N/A
Permit Type:
Exterior and inte...
Building Type:
N/A
This is through the city loan/gran program. replace water supply and replace water pipes throughout house
Valuation:
$4,000
Permit #:
BRCM-25-015413
Status:
triage
Fee:
N/A
Permit Type:
Exterior and inte...
Building Type:
N/A
Gas test furnace 90 stove 40 replacing 2 fixtures
Valuation:
N/A
Permit #:
BRCM-25-007472
Status:
complete
Fee:
$115
Permit Type:
Interior trades only
Building Type:
N/A
Install 2 sump pumps. install discharge pipe from rain leaders to end of property
Valuation:
$3,000
Permit #:
BRCM-25-016903
Status:
complete
Fee:
$104
Permit Type:
Exterior and inte...
Building Type:
N/A
Install (1) # water service pipe ( 1-2 family. res.) as per code
Valuation:
N/A
Permit #:
COM2024-88182
Status:
triage
Fee:
N/A
Permit Type:
Other
Building Type:
N/A
Install drain tile and sump pump
Valuation:
N/A
Permit #:
BRCM-25-016901
Status:
complete
Fee:
$52
Permit Type:
Interior trades only
Building Type:
N/A
(kitchen cabinet refacing - reconnect kitchen sink)
Valuation:
N/A
Permit #:
P9802694
Status:
VOID
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
P9802327
Status:
VOID
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install (2) # water service pipe new interior as per code
Valuation:
N/A
Permit #:
COM2024-94128
Status:
expired
Fee:
$78
Permit Type:
N/A
Building Type:
N/A
Painting: 1st floor walls & ceiling @ living kitchen & 3rd bathroom (total sq/ft: 184 sq/ft.) 1 cover & tape 3rd floor bathroom floor vanity cabinet hvac register plumbing fixtures and remove electrical plates 2 prep & repair all minor dents cuts nail holes peeling paint on drywall surfaces and re-caulk all trim with missing caulk 3 apply (1) coat of satin paint to all 3rd floor. bath... see more
Valuation:
N/A
Permit #:
COM2024-94616
Status:
expired
Fee:
$410
Permit Type:
N/A
Building Type:
N/A
Install (6) # plumbing fixtures (6) # plumbing fixtures as per code
Valuation:
N/A
Permit #:
COM2024-95516
Status:
expired
Fee:
$88
Permit Type:
N/A
Building Type:
N/A
Reinstate original permit.(original permit:com2024-69338:install (5) # plumbing fixtures as per code.) original permit description:(com2024-69338) install (5) # plumbing fixtures as per code
Valuation:
N/A
Permit #:
COM2024-96357
Status:
expired
Fee:
$52
Permit Type:
N/A
Building Type:
N/A
Reinstate original permit.(original permit:com2024-66880:install (5) # plumbing fixtures as per code.) original permit description:(com2024-66880) install (5) # plumbing fixtures as per code
Valuation:
N/A
Permit #:
COM2024-96352
Status:
expired
Fee:
$52
Permit Type:
N/A
Building Type:
N/A
Install (1) # drain tile (1) # plumbing fixtures as per code
Valuation:
N/A
Permit #:
COM2024-97034
Status:
expired
Fee:
$57
Permit Type:
N/A
Building Type:
N/A
Replace gas boiler
Valuation:
$3,000
Permit #:
BRCM-25-023504
Status:
complete
Fee:
$52
Permit Type:
Trade work only
Building Type:
N/A
Install drain tile and install sump pump
Valuation:
N/A
Permit #:
BRCM-25-019659
Status:
complete
Fee:
$52
Permit Type:
Interior trades only
Building Type:
N/A
This is through the city loan/grant program. replace water supply and water piping throughout house
Valuation:
N/A
Permit #:
BRCM-25-014395
Status:
triage
Fee:
N/A
Permit Type:
Interior trades only
Building Type:
N/A
Similar Contractors See more
120
BZ Score
-
Avg Project
-
Projects
120
BZ Score
$1.5K
Avg Project
-
Projects
120
BZ Score
$1.5K
Avg Project
-
Projects
David Keith Kolper Reviews
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Verified License
BuildZoom confirmed this contractor's license
David Keith Kolper License info
Verified License
| License # | 9290 |
| Status | Active |
| State | Maryland |
| Type | Plumbers |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for David Keith Kolper at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
98
BuildZoom Score
17
Permits
- Building permit records show that David Keith Kolper has worked on 17 permitted projects.
David Keith Kolper Employees
DK
David Keith Kolper
Owner