Updated: Jun 24, 2026
Location and Projects
Address
612 CALIFORNIA TERRACE, Frederick, MD, 21701
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Thomas Bilson Architect
Thomas Bilson, 612 California Ter, Frederick, MD (Employee: Thomas C. Bilson) holds a Heating, Ventilation, Air Conditioning And Refrigeration license and 5 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 Thomas Bilson, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Thomas Bilson Services
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Thomas Bilson Contact Information
Phone Number: (410) 729-8587
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Address: 612 CALIFORNIA TERRACE, Frederick, MD 21701
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Installation of 2 zone ductless split heat pump in garage conversion
Valuation:
N/A
Permit #:
M23001130
Status:
complete
Fee:
$138
Permit Type:
N/A
Building Type:
N/A
(sfth)basement bathroom install 1 lav and 1 shower reuse existing toilet replace exciting electric water heater with new
Valuation:
N/A
Permit #:
P19005661
Status:
complete
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
Single family dwelling install plumbing fixtures: 1-shower 1-lav 1-water closet 2-kitchen sinks 1-washing machine conn 1-dishwasher 1-pot filler
Valuation:
N/A
Permit #:
P18002271
Status:
complete
Fee:
$116
Permit Type:
N/A
Building Type:
N/A
Sfd/1/2 bathroom in garage conversion - 1-toilet 2 lavs in garage conversion
Valuation:
N/A
Permit #:
P23004432
Status:
complete
Fee:
$89
Permit Type:
N/A
Building Type:
N/A
Replace existing 2nd story rear/porch no change in size
Valuation:
$450
Permit #:
C-20202439
Status:
complete
Fee:
N/A
Permit Type:
Residential porch...
Building Type:
N/A
Single family dwelling install gas line for cooktop
Valuation:
N/A
Permit #:
P18004627
Status:
complete
Fee:
$78
Permit Type:
N/A
Building Type:
N/A
Residential plumbing addition alteration permit
2013-03-19
Sfd/install plumbing fixtures in basement/1-lav/1-water closet/1-sewer ejector/1-bar sink/gas--2-fireplaces (standard low pressure)
Valuation:
N/A
Permit #:
P13001108
Status:
complete
Fee:
$127
Permit Type:
N/A
Building Type:
N/A
Addition heating and air conditioning install dual ductless heat pump unit with 2 9, 000 btu indoor units
Valuation:
N/A
Permit #:
M02158882
Status:
complete
Fee:
$95
Permit Type:
N/A
Building Type:
N/A
Residential plumbing addition alteration permit
2022-09-12
Gas line for fireplace
Valuation:
N/A
Permit #:
P22003739
Status:
complete
Fee:
$78
Permit Type:
N/A
Building Type:
N/A
Residential plumbing addition alteration permit
2017-05-22
Single family dwelling install plumbing fixtures: 1-shower 1-lav 1-water closet 1-wet bar
Valuation:
N/A
Permit #:
P17002318
Status:
complete
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
Alteration to an existing building install sewage ejector for new 3/4 bathroom laundry r oom and kitchen
Valuation:
N/A
Permit #:
P02220851
Status:
complete
Fee:
$85
Permit Type:
N/A
Building Type:
N/A
Repair of sidewalk and apron
Valuation:
N/A
Permit #:
C-20191227
Status:
filed
Fee:
$40
Permit Type:
Eng curb sidewalk...
Building Type:
N/A
Building a cherry hill construction/conference room install 11 phone 11 data & 2 speaker devices b09002861 contact 301-884-3126
Valuation:
N/A
Permit #:
E09004833
Status:
complete
Fee:
$72
Permit Type:
N/A
Building Type:
N/A
Plumbing for an alteration relocate waste and water in existing bathroom for new fixtures, washing machine, new floor drain
Valuation:
N/A
Permit #:
P02194453
Status:
canceled
Fee:
$80
Permit Type:
N/A
Building Type:
N/A
Residential plumbing addition alteration permit
2013-06-26
Single family dwelling install gas line to generator
Valuation:
N/A
Permit #:
P13002811
Status:
complete
Fee:
$78
Permit Type:
N/A
Building Type:
N/A
Residential plumbing addition alteration permit
2017-07-19
Single family dwelling install plumbing fixtures: 1-bathtub 2-lavs 1-water closet 1-sill cock 1-wet bar energy code prescriptive method
Valuation:
N/A
Permit #:
P17003264
Status:
complete
Fee:
$105
Permit Type:
N/A
Building Type:
N/A
Sfd/replace water service
Valuation:
N/A
Permit #:
P13001107
Status:
complete
Fee:
$105
Permit Type:
N/A
Building Type:
N/A
Alteration to an existing building install complete bathroom with sewage ejector and bar sink with pump in basement
Valuation:
N/A
Permit #:
P02157228
Status:
complete
Fee:
$80
Permit Type:
N/A
Building Type:
N/A
Range 40k btus f/p 45k grill 45k btus revised 5-20-04srp new gas hot water heater-- 65, 000 btus
Valuation:
N/A
Permit #:
P02124101
Status:
complete
Fee:
$105
Permit Type:
N/A
Building Type:
N/A
Residential plumbing addition alteration permit
2007-08-10
Single family dwelling install gas line for outdoor grill
Valuation:
N/A
Permit #:
P07003213
Status:
complete
Fee:
$78
Permit Type:
N/A
Building Type:
N/A
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125
BZ Score
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127
BZ Score
$42.5K
Avg Project
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Projects
128
BZ Score
$1
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Projects
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Verified License
BuildZoom confirmed this contractor's license
Thomas Bilson License info
Verified License
| License # | 52742 |
| Status | Active |
| State | Maryland |
| Type | Heating, Ventilation, Air Conditioning And Refrigeration |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Thomas Bilson 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 # | 9998 |
| Status | Active |
| State | Maryland |
| Type | Plumbers |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Thomas Bilson 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 # | 9998 |
| Status | Active |
| State | Maryland |
| Type | Architects |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Thomas Bilson 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 # | 52742 |
| Status | Active |
| State | Maryland |
| Type | Heating, Ventilation, Air Conditioning And Refrigeration |
| Class | Heating, Ventilation, Air Conditioning and Refrigeration |
- When BuildZoom last verified this license, it had an expiration date of June, 2018. Check the current license status of Thomas Bilson 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 # | 9449 |
| Status | Inactive |
| State | Maryland |
| Type | Heating, Ventilation, Air Conditioning And Refrigeration |
- According to the Maryland Department of Labor, Licensing & Regulation, 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 Bilson at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| City | Annapolis |
| Type | Plumbing 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 Bilson at the The City of Annapolis, MD.
This is a sample of licensing data; click here to access a complete history.
93
BuildZoom Score
36
Permits
- Building permit records show that Thomas Bilson has worked on 36 permitted projects.
Thomas Bilson Employees
TB
Thomas Bilson
Owner
TB
Thomas C. Bilson
Owner