Updated: Sep 28, 2025
Location and Projects
Address
2650 BETHANY LANE, Ellicott City, MD, 21042
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Diffendal Construction Company
Diffendal Construction Company, 2650 Bethany Ln, Ellicott City, MD (Owned by: David Charles Diffendal) holds a Heating, Ventilation, Air Conditioning And Refrigeration license and 4 other licenses according to the Maryland license board.
Their BuildZoom score of 93 ranks in the top 27% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Diffendal Construction Company, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Diffendal Construction Company Services
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Diffendal Construction Company Contact Information
Address: 2650 BETHANY LANE, Ellicott City, MD 21042
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Diffendal Construction Company Ellicott City
Quality
93
73rd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Diffendal Construction Company has a BuildZoom score of 93, which places them above 73% of 58,058 contractors in Maryland.
Activity
|
1 project
|
2023 |
|
1 project
|
2022 |
Our building permit records indicate that Diffendal Construction Company has worked on at least
2.0 projects over the past 3 years.
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.
Pricing
|
1 project
|
$20k-$50k |
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.
Building Permits by Diffendal Construction Company
This is a sample of this contractor's permits. Click here to access their complete permit history.
Interior renovations to master bathroom
Valuation:
$35,800
Permit #:
RR-22-0790
Status:
issued
Fee:
$85
Permit Type:
N/A
Building Type:
N/A
Addition on piers to enlarge bedroom renovate two bathrooms
Valuation:
$3,569
Permit #:
BP-19-2223
Status:
issued
Fee:
$267
Permit Type:
N/A
Building Type:
N/A
Carport attached to existing garage
Valuation:
N/A
Permit #:
BP-18-1625
Status:
issued
Fee:
$50
Permit Type:
N/A
Building Type:
N/A
Detached garage
Valuation:
$30,000
Permit #:
BP-18-0565
Status:
issued
Fee:
$182
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
BP181625
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Residential open or screened porch permit
2023-04-06
Sfd/construct 12’ by 15’ open covered porch no steps with ramp
Valuation:
N/A
Permit #:
B23001126
Status:
complete
Fee:
$61
Permit Type:
N/A
Building Type:
N/A
Convert 2 garage doors to 1 garage door
Valuation:
$2,500
Permit #:
BP-19-0382
Status:
issued
Fee:
$75
Permit Type:
N/A
Building Type:
N/A
Single family residence - new residential
2006-12-22
Nr-split foyer w/garage - finished basement/family room office & bathroom
Valuation:
$97,560
Permit #:
BP-06-3532B
Status:
issued
Fee:
$7,851
Permit Type:
N/A
Building Type:
N/A
Remove & reconstruct 3 porches
Valuation:
$20,000
Permit #:
BP-19-0520
Status:
issued
Fee:
$180
Permit Type:
N/A
Building Type:
N/A
Repair/replace collasped roof over garage area of existing building
Valuation:
$75,000
Permit #:
BP-10-0208
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
BP180565
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Enclose ex.breezeway; addition bathroom; create doorway in ex.garage
Valuation:
$3,569
Permit #:
BP-10-1368
Status:
issued
Fee:
$105
Permit Type:
N/A
Building Type:
N/A
Addition on crawl-new kitchen area master bedroom
Valuation:
$42,831
Permit #:
BP-12-1058
Status:
issued
Fee:
$340
Permit Type:
N/A
Building Type:
N/A
Attached garage w/screened porch above
Valuation:
$58,224
Permit #:
BP-12-1418
Status:
issued
Fee:
$352
Permit Type:
N/A
Building Type:
N/A
Removing 2 walls to enlarge office space - crawford insurance
Valuation:
$7,800
Permit #:
BP-10-0631
Status:
issued
Fee:
$255
Permit Type:
N/A
Building Type:
N/A
Interior renovations to enlarge bathroom (2nd floor)
Valuation:
$18,000
Permit #:
BP-12-0489
Status:
issued
Fee:
$75
Permit Type:
N/A
Building Type:
N/A
Residence. apartment. or dwelling unit
1000 Larrick Drive, MD
2014-06-04
No Description Available
Valuation:
N/A
Permit #:
BP140556
Status:
ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
1-story apartment addition w/attached garage - unfinished basement
Valuation:
$149,352
Permit #:
BP-14-0556
Status:
issued
Fee:
$1,450
Permit Type:
N/A
Building Type:
N/A
Addition on slab for office/conference rm- crawford yingling insurance
Valuation:
$28,470
Permit #:
BP-13-0427
Status:
issued
Fee:
$395
Permit Type:
N/A
Building Type:
N/A
Commercial addition
58-W Main Street - District 7-1, MD
2013-05-29
No Description Available
Valuation:
N/A
Permit #:
BP130427
Status:
ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Diffendal Construction Company Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Diffendal Construction Company License info
Verified License
| License # | 4387 |
| Status | Active |
| State | Maryland |
| Type | Heating, Ventilation, Air Conditioning And Refrigeration |
- BuildZoom verified this license was active as of September 2025.
Verify this license's status for Diffendal Construction Company at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 21701 |
| Status | Active |
| State | Maryland |
| Type | Plumbers |
- BuildZoom verified this license was active as of May 2025.
Verify this license's status for Diffendal Construction Company at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 39013 |
| Status | Active |
| State | Maryland |
| Type | Home Improvement |
- BuildZoom verified this license was active as of September 2025.
Verify this license's status for Diffendal Construction Company 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 # | 39012 |
| Status | Active |
| State | Pennsylvania |
| Type | Contractor Corp Part |
- When BuildZoom last verified this license, it had an expiration date of April, 2014. Check the current license status of Diffendal Construction Company with the Pennsylvania Office of the Attorney General
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 39012 |
| Status | Active |
| State | Maryland |
| Type | Contractor (Corppart) Home Improvement |
- When BuildZoom last verified this license, it had an expiration date of April, 2014. Check the current license status of Diffendal Construction Company with the Maryland Department of Labor, Licensing & Regulation
This is a sample of licensing data; click here to access a complete history.
93
BuildZoom Score
19
Permits
- Building permit records show that Diffendal Construction Company has worked on 19 permitted projects.
Diffendal Construction Company Employees
DD
David C. Diffendal
Owner
DD
David Charles Diffendal
Owner
DC
Diffendal Construction Company
Owner
TD
Thomas Lee Diffendal
Owner