Updated: Jun 03, 2026
Location and Projects
Address
Laytonsville, MD, 20882
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Thomas J. Ondulich Construction
Serving Laytonsville, Maryland, Thomas J. Ondulich has over two decades of experience in the construction industry. Operating since 2001, the company works with homeowners and property managers on a range of residential projects in the greater Montgomery County area. Project types have included home additions, remodels, and renovation work aimed at enhancing living spaces and property value. With 23 years in business, Thomas J. Ondulich draws on established construction practices to deliver results on projects such as kitchen updates, bathroom remodels, and general home improvements. The company is familiar with permit requirements in Maryland and has managed a variety of project scopes and building types. Clients in Laytonsville and neighboring communities seek Thomas J. Ondulich for practical expertise in residential renovations and construction.
Thomas J. Ondulich Services
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Thomas J. Ondulich Contact Information
Phone Number: (240) 731-1469
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Thomas J. Ondulich Laytonsville
Quality
104
91st percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Thomas J. Ondulich has a BuildZoom score of 104, which places them above 91% of 58,058 contractors in Maryland.
Activity
|
4 projects
|
2025 |
|
9 projects
|
2024 |
|
9 projects
|
2023 |
Our building permit records indicate that Thomas J. Ondulich has worked on at least
22.0 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
|
13 projects
|
Home Additions |
Analyzing permits over the last 4 years shows that Thomas J. Ondulich mostly works on
home addition
projects.
Pricing
|
8 projects
|
< $5k |
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.
Heavy up service from 200 to 350amps install 2 generator transfer switches for future generator. relocate service to detached garage and feed garage from 150amp transfer switch and house from 200amp transfer switch. transfer switches will be used as primary disconnect switches and to serve future generator
Valuation:
N/A
Permit #:
461733
Status:
complete
Fee:
$105
Permit Type:
Elecperm
Building Type:
N/A
Building c to include interior renovations to existing floor plan; no room changes alteration to exisiting dwelling to become pastor dwelling **revision 9/30/2019 (blh) addition 200 amp heavy up this permit replaces permit #188922
Valuation:
$3,500
Permit #:
191088
Status:
complete
Fee:
$308
Permit Type:
Elecperm
Building Type:
N/A
Addition gfci outlet for egress window
Valuation:
N/A
Permit #:
E25001468
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Install tesla charger
Valuation:
$500
Permit #:
493295
Status:
filed
Fee:
N/A
Permit Type:
Elecperm
Building Type:
N/A
Wire for basement finish kitchen remodel hall bathroom remodel<div>permit replaced by 396828</div>
Valuation:
$8,000
Permit #:
386432
Status:
complete
Fee:
$283
Permit Type:
Elecperm
Building Type:
N/A
Replace some existing non grounded wiring; 240 v 60a hvac circut; 240v 30a hvac (outdoor) circut; new bathroom on second floor. alteration to include section of existing open play room to be new bathroom revision 11/12/19 lp - addition circuit to garage min lights & receptacles
Valuation:
$4,250
Permit #:
201523
Status:
complete
Fee:
$214
Permit Type:
Elecperm
Building Type:
N/A
Residential electrical addition alteration permit
2023-02-06
Single family dwelling - install (1) egress window b22004345
Valuation:
N/A
Permit #:
E23000647
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Addition gfci outlets for egress windows b23000439
Valuation:
N/A
Permit #:
E23001847
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Electrical outlets for renovations/2 subpanels/200 amp service to 400 amp service
Valuation:
N/A
Permit #:
ELR-22-0665
Status:
approved
Fee:
$255
Permit Type:
N/A
Building Type:
N/A
<div>add recessed lights , switches outlets ceiling fans and smoke detectors
Valuation:
$2,000
Permit #:
422887
Status:
complete
Fee:
$201
Permit Type:
Elecperm
Building Type:
N/A
Single family dwelling install (2) gfci outlets for each egress window b24000807
Valuation:
N/A
Permit #:
E24001827
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Electrical to install a gfci outlet for 28 in. x 45 in. egress window
Valuation:
N/A
Permit #:
2022-03441
Status:
complete
Fee:
$95
Permit Type:
N/A
Building Type:
N/A
Install 23 recessed lights 25 switches and outlets combo smoke detector
Valuation:
$1,500
Permit #:
401425
Status:
complete
Fee:
$192
Permit Type:
Elecperm
Building Type:
N/A
Residential electrical addition alteration permit
2022-02-08
Single family dwelling install egress window gfci outlet 2407311469
Valuation:
N/A
Permit #:
E22000595
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Residential electrical addition alteration permit
2022-05-05
Addition (1) gfci outlet for egress window 2407311469
Valuation:
N/A
Permit #:
E22002414
Status:
issued
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Request for permit to; addition (1) gfci outlet for egress window sump pump
Valuation:
$250
Permit #:
ELEC-32100-2023
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Residential electrical addition alteration permit
2025-09-21
Install gfci outlet for egress window
Valuation:
N/A
Permit #:
E25005532
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Residential electrical addition alteration permit
2025-07-21
Addition one outlet for egress window
Valuation:
N/A
Permit #:
E25004008
Status:
complete
Fee:
$55
Permit Type:
N/A
Building Type:
N/A
Wire for patio to include lights ceiling fans and lv lights
Valuation:
$2,500
Permit #:
484169
Status:
complete
Fee:
$225
Permit Type:
Elecperm
Building Type:
N/A
Addition gfci outlet for egress window
Valuation:
N/A
Permit #:
ELR-22-1215
Status:
approved
Fee:
$60
Permit Type:
N/A
Building Type:
N/A
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Thomas J. Ondulich Reviews
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Verified License
BuildZoom confirmed this contractor's license
Thomas J. Ondulich License info
Verified License
| License # | 10041 |
| Status | Active |
| State | Maryland |
| Type | Electricians |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Thomas J. Ondulich 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 # | CON-3991 |
| 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 Thomas J. Ondulich 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 | Ohio Security |
74
Permits
- Building permit records show that Thomas J. Ondulich has worked on 74 permitted projects.
Thomas J. Ondulich Employees
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Thomas J. Ondulich
Owner