Updated: Jun 28, 2026
Location and Projects
Address
Prince Frederick, MD, 20678
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James Donald Horstkamp Solar Contractor
James Donald Horstkamp, Prince Frederick, MD holds a Electricians license and 1 other license according to the Maryland license board.
Their BuildZoom score of 110 ranks in the top 4% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring James Donald Horstkamp, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
James Donald Horstkamp Contact Information
Phone Number: (301) 927-4900
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James Donald Horstkamp Prince Frederick
Quality
110
96th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
James Donald Horstkamp has a BuildZoom score of 110, which places them above 96% of 58,058 contractors in Maryland.
Activity
|
47 projects
|
2025 |
|
24 projects
|
2024 |
|
21 projects
|
2023 |
Our building permit records indicate that James Donald Horstkamp has worked on at least
92.0 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.
Experience
|
78 projects
|
Solar installations |
Analyzing permits over the last 4 years shows that James Donald Horstkamp mostly works on
solar installation
projects.
Pricing
|
1 project
|
< $5k |
|
19 projects
|
$20k-$50k |
|
8 projects
|
$50k-$100k |
|
3 projects
|
$100k-$250k |
The typical size of their permits is approximately $46,072. This graph shows the distribution of these job values.
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 James Donald Horstkamp
This is a sample of this contractor's permits. Click here to access their complete permit history.
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Valuation:
N/A
Permit #:
E-2419518
Status:
complete
Fee:
$80
Permit Type:
Ipelectric
Building Type:
N/A
Installation of (16) roof mounted solar panels (16) optimizers (1) se 10k inverter and (2) ev chargers.<div><p>
Valuation:
N/A
Permit #:
E-2428953
Status:
complete
Fee:
$780
Permit Type:
Ipelectric
Building Type:
N/A
<span style="background-color: rgb(229 229 229);">installation of (48) 370w roof mounted solar panels (48) microinverters and (1) level 2 ev charger.</span>
Valuation:
N/A
Permit #:
E-2419937
Status:
complete
Fee:
$200
Permit Type:
Ipelectric
Building Type:
N/A
Installation of (17) roof mounted solar panels and (17) micro inverters.<div>
Valuation:
N/A
Permit #:
E-2430554
Status:
complete
Fee:
$160
Permit Type:
Ipelectric
Building Type:
N/A
Installation of (28) roof mounted solar panels and (28) microinverters.<div>
Valuation:
N/A
Permit #:
E-2429330
Status:
complete
Fee:
$160
Permit Type:
Ipelectric
Building Type:
N/A
<span>installation of (61) roof mounted 370w solar panels and (61) microinverters.</span><div><span>
Valuation:
N/A
Permit #:
E-2420615
Status:
complete
Fee:
$120
Permit Type:
Ipelectric
Building Type:
N/A
Installation of (40) ground mounted solar panels and (40) micro inverters.<div>
Valuation:
$58,480
Permit #:
2432566
Status:
applied
Fee:
$78
Permit Type:
Ipbldg
Building Type:
N/A
Installation of (39) roof mounted solar panels and (39) microinverters.<div>
Valuation:
$45,118
Permit #:
2432299
Status:
plancheck
Fee:
$85
Permit Type:
Ipbldg
Building Type:
N/A
Install photovoltaic roof mount system: 6.3 kw dc 4.35 kw air conditioning size(15) 420w modules + (15) 290w microinverters<div>
Valuation:
N/A
Permit #:
E-2427595
Status:
complete
Fee:
$160
Permit Type:
Ipelectric
Building Type:
N/A
<span style="background-color: rgb(229 229 229);">installing (38) roof mounted solar panels </span>
Valuation:
N/A
Permit #:
E-2419041
Status:
complete
Fee:
$80
Permit Type:
Ipelectric
Building Type:
N/A
Photovoltaic roof mount system - 35 modules-roof mounted - 14.000 kw dc + 01 franklin wh apower x 13.6 kwh battery<div>
Valuation:
N/A
Permit #:
E-2426810
Status:
complete
Fee:
$360
Permit Type:
Ipelectric
Building Type:
N/A
Install residence. roof mount photovoltaic install
Valuation:
N/A
Permit #:
E-2424541
Status:
complete
Fee:
$900
Permit Type:
Ipelectric
Building Type:
N/A
Electrical to install (42) roof mounted solar panels and (42) microinverters 15.54 kw lester b. ridenour and marina k. ridenour remaining lands
Valuation:
N/A
Permit #:
2023-03947
Status:
complete
Fee:
$205
Permit Type:
N/A
Building Type:
N/A
<span style="background-color: rgb(229 229 229);">install 84 roof mounted solar panels</span>
Valuation:
N/A
Permit #:
E-2419519
Status:
complete
Fee:
$120
Permit Type:
Ipelectric
Building Type:
N/A
Installation of (312) roof mounted solar panels (156) optimizer and (2) inverters.<div>
Valuation:
N/A
Permit #:
E-2431807
Status:
plancheck
Fee:
$300
Permit Type:
Ipelectric
Building Type:
N/A
Install residential roof mounted solar photovoltaic system (25) 420w panels and (25) 290w microinverters<div>
Valuation:
N/A
Permit #:
E-2427264
Status:
complete
Fee:
$160
Permit Type:
Ipelectric
Building Type:
N/A
Install residential roof mount solar photovoltaic system 15 395w solar panels and 30 290w microinverters<div>
Valuation:
N/A
Permit #:
E-2426373
Status:
complete
Fee:
$100
Permit Type:
Ipelectric
Building Type:
N/A
Install residential roof mounted solar photovoltaic system; (32) 400w panels and (32) 290w microinverters<div>
Valuation:
N/A
Permit #:
E-2425769
Status:
complete
Fee:
$80
Permit Type:
Ipelectric
Building Type:
N/A
Install residential roof mounted solar photovoltaic system; (23) 400w panels and (23) 290w microinverters<div>
Valuation:
N/A
Permit #:
E-2425357
Status:
complete
Fee:
$80
Permit Type:
Ipelectric
Building Type:
N/A
Installation of (18) roof mounted solar panels and (18) micro inverters.<div>
Valuation:
N/A
Permit #:
E-2432593
Status:
plancheck
Fee:
N/A
Permit Type:
Ipelectric
Building Type:
N/A
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James Donald Horstkamp License info
Verified License
| License # | 16181 |
| Status | Active |
| State | Maryland |
| Type | Electricians |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for James Donald Horstkamp at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | E0272 |
| Status | Inactive |
| City | Annapolis |
| Type | Electrical Cont |
- According to the The City of Annapolis, MD, 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 James Donald Horstkamp at the The City of Annapolis, MD.
This is a sample of licensing data; click here to access a complete history.
110
BuildZoom Score
Insured
| Insurer | Acord |
112
Permits
- Building permit records show that James Donald Horstkamp has worked on 112 permitted projects.