Updated: May 26, 2026
Location and Projects
Address
17120 N DALLAS PKWY #235 DALLAS, TX 75248, Addison, TX, 75001
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Blackall Mechanical
Blackall Mechanical, 17120 N Dallas Pkwy, Addison, TX (Owned by: Seel William) holds a license and 29 other licenses according to the Denton license board.
Their BuildZoom score of 93 ranks in the top 27% of 222,249 Texas licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Blackall Mechanical, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Blackall Mechanical Contact Information
Phone Number: (512) 339-3090
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Address: 17120 N DALLAS PKWY #235 DALLAS, TX 75248, Addison, TX 75001
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Interior remodel - tfo
Valuation:
$365,681
Permit #:
1907-0466
Status:
issued
Fee:
$2,053
Permit Type:
N/A
Building Type:
N/A
Application name: radiant healthcare services radiant healthcare services
assigned to staff: charles bloomberg
description: valuation $65,000 - offices - interior finish out
Valuation:
$65,000
Permit #:
COMR09-0028
Status:
complete
Fee:
$1,185
Permit Type:
N/A
Building Type:
N/A
Application name: radiant healthcare services radiant healthcare services assigned to staff: charles bloomberg description: valuation $65, 000 - offices - interior finish out
Valuation:
$65,000
Permit #:
COMR09-0028
Status:
complete
Fee:
$1,185
Permit Type:
N/A
Building Type:
N/A
Hvac like for like remote terminal unit unit replacement working without a permit
Valuation:
$75,000
Permit #:
MECH-21-0951
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Blackall mechanical offices electrical contractor needs to reg
Valuation:
$40,000
Permit #:
CBLD2017-06-0045
Status:
final
Fee:
N/A
Permit Type:
Remodel
Building Type:
N/A
Extended stay hotel - install rpz soda machine in kit
Valuation:
$500
Permit #:
BLD18-14658
Status:
final
Fee:
$45
Permit Type:
Backflow
Building Type:
N/A
Blackall mechanical inc
Valuation:
N/A
Permit #:
CO-000086-2017
Status:
issued
Fee:
$150
Permit Type:
N/A
Building Type:
N/A
Plumbing permit - repair - install backflow preventer to water line of existing commercial facility. - commercial
Valuation:
N/A
Permit #:
2018-083782 PP
Status:
final
Fee:
$55
Permit Type:
Commercial
Building Type:
N/A
New 2 story 3000 sf conditioned area wood framed live/work building and sitework
Valuation:
$250,000
Permit #:
BLDC18-12-011745
Status:
complete
Fee:
$2,525
Permit Type:
N/A
Building Type:
N/A
Adventure sports facility - landing point
Valuation:
$1,500,000
Permit #:
BLD2018-2276
Status:
issued
Fee:
$46,103
Permit Type:
N/A
Building Type:
N/A
Blackall mechanical offices electrical contractor needs to reg
Valuation:
$40,000
Permit #:
CBLD2017-06-0045
Status:
final
Fee:
$869
Permit Type:
N/A
Building Type:
N/A
Plumbing permit - repair - repair gas leak. require inspection to reconnect for existing commercial property. - commercial
Valuation:
N/A
Permit #:
2015-115379 PP
Status:
final
Fee:
$47
Permit Type:
Commercial
Building Type:
N/A
Mechanical permit - remodel - change of use and interior remodel to create personal services. duct work and 1 system - commercial
Valuation:
N/A
Permit #:
2014-097343 MP
Status:
final
Fee:
$791
Permit Type:
Commercial
Building Type:
N/A
Plumbing permit - repair - emergency repair gas leak to existing commercial building. - commercial
Valuation:
N/A
Permit #:
2016-120738 PP
Status:
final
Fee:
$260
Permit Type:
Commercial
Building Type:
N/A
Plumbing permit - remodel - remove and replace a water storage tank to existing commercial only. - commercial
Valuation:
N/A
Permit #:
2015-040104 PP
Status:
final
Fee:
$196
Permit Type:
Commercial
Building Type:
N/A
Mechanical permit - remodel - change out air handler and condenser in the it room to existing hotel. - commercial
Valuation:
N/A
Permit #:
2015-014912 MP
Status:
final
Fee:
$135
Permit Type:
Commercial
Building Type:
N/A
Mvba law firm - replace 2 rtu's
Valuation:
$21,000
Permit #:
MCHC1605-0003
Status:
issued
Fee:
$149
Permit Type:
Replace
Building Type:
N/A
Outlet mall building 8 - replace rooftop units
Valuation:
$24,100
Permit #:
MCHC1603-0004
Status:
issued
Fee:
$165
Permit Type:
Replace
Building Type:
N/A
Extended stay - gas leak unsure where
Valuation:
$650
Permit #:
PLC1602-0002
Status:
issued
Fee:
$35
Permit Type:
Repair
Building Type:
N/A
Mechanical permit - remodel - finish out for personal improvement services duct work only - commercial
Valuation:
N/A
Permit #:
2014-097346 MP
Status:
final
Fee:
$838
Permit Type:
Commercial
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Blackall Mechanical License info
Verified License
| License # | TACLA20715C |
| Status | Active |
| County | Denton |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Blackall Mechanical at the Denton County.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | LA020715C |
| Status | Active |
| County | Denton |
| Type | Hvac |
- When BuildZoom last verified this license, it had an expiration date of November, 2019. Check the current license status of Blackall Mechanical with the Denton County
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 2019 101426 000 00 BR |
| Status | Active |
| City | Arlington |
| Type | Hvac Mechanical Contractor |
- When BuildZoom last verified this license, it had an expiration date of November, 2019. Check the current license status of Blackall Mechanical with the City of Arlington, TX
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | PM17624 |
| Status | Active |
| City | San Antonio |
| Type | Pm Plumber |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Blackall Mechanical at the City of San Antonio, TX Licensed Contractors.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| Status | Active |
| City | Dallas |
| Type | Mechanical (Me) |
- When BuildZoom last verified this license, it had an expiration date of December, 2017. Check the current license status of Blackall Mechanical with the City of Dallas
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | TACLA00012604E |
| Status | Active |
| State | Florida |
| Type | Plumbing |
- BuildZoom has not verified this license since January, 2010.
Verify this license's status for Blackall Mechanical at the Florida Department of Business & Professional Regulation.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | TACLA00020715C |
| Status | Active |
| State | Texas |
| Type | HVAC Air Conditioning/Refrigeration Contractor |
- When BuildZoom last verified this license, it had an expiration date of May, 2016. Check the current license status of Blackall Mechanical with the Texas Department of Licensing and Regulation
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| County | Denton |
- According to the Denton County, 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.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| County | Denton |
- According to the Denton County, 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.
This is a sample of licensing data; click here to access a complete history.
Unverified License
| License # | AEC-6425 |
| Status | Unable To Verify |
| Town | Flower Mound |
| Type | Contractors |
- BuildZoom was not able to verify this license with the licensing board
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | AEC-6967 |
| Status | Inactive |
| Town | Flower Mound |
| Type | Lic Cont (Bi) |
- According to the Flower Mound Department of Building Inspections, 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 Blackall Mechanical at the Flower Mound Department of Building Inspections.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | PM17624 |
| Status | Inactive |
| City | San Antonio |
- According to the City of San Antonio, TX Licensed Contractors, 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 Blackall Mechanical at the City of San Antonio, TX Licensed Contractors.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | TACLA00012604E |
| Status | Inactive |
| State | Texas |
| Type | Air Conditioning/Refrigeration Contractor |
- According to the Texas Department of Licensing and 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 Blackall Mechanical at the Texas Department of Licensing and Regulation.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| City | Dallas |
| Type | Plumbing (Pl) |
- According to the City of Dallas, 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.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | R18-0871 |
| Status | Inactive |
| City | Frisco |
| Type | Building |
- According to the The City of Frisco, TX, 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 Blackall Mechanical at the The City of Frisco, TX.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| City | Dallas |
| Type | Mechanical (Me) |
- According to the City of Dallas, 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.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| City | Dallas |
| Type | Mechanical (Me) |
- According to the City of Dallas, 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.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| City | Dallas |
| Type | Mechanical (Me) |
- According to the City of Dallas, 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.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | PLBG3017681 |
| Status | Inactive |
| City | Farmers Branch |
| Type | Plumbing Contractor |
- According to the City of Farmers Branch, 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 Blackall Mechanical at the City of Farmers Branch.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | PLBG3823091 |
| Status | Inactive |
| City | Farmers Branch |
| Type | Plumbing Contractor |
- According to the City of Farmers Branch, 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 Blackall Mechanical at the City of Farmers Branch.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | PLBG6344784 |
| Status | Inactive |
| City | Farmers Branch |
| Type | Plumbing Contractor |
- According to the City of Farmers Branch, 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 Blackall Mechanical at the City of Farmers Branch.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 6670 |
| Status | Inactive |
| City | Round Rock |
| Type | Contractor |
- According to the The City of Round Rock, TX , 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 Blackall Mechanical at the The City of Round Rock, TX .
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 4914 |
| Status | Inactive |
| City | Round Rock |
| Type | Contractor |
- According to the The City of Round Rock, TX , 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 Blackall Mechanical at the The City of Round Rock, TX .
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | R09-0528 |
| Status | Inactive |
| City | Frisco |
| Type | Building |
- According to the The City of Frisco, TX, 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 Blackall Mechanical at the The City of Frisco, TX.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | R04-0640 |
| Status | Inactive |
| City | Frisco |
| Type | Building |
- According to the The City of Frisco, TX, 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 Blackall Mechanical at the The City of Frisco, TX.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | A00-10001399 |
| Status | Inactive |
| City | Colleyville |
| Type | Mechanical |
- According to the The City of Colleyville, TX, 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 Blackall Mechanical at the The City of Colleyville, TX.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 16843 |
| Status | Inactive |
| City | Plano |
| Type | Mechanical Contractor |
- According to the City of Plano, Texas, 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 Blackall Mechanical at the City of Plano, Texas.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 16842 |
| Status | Inactive |
| City | Plano |
| Type | Plumbing Contractor |
- According to the City of Plano, Texas, 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 Blackall Mechanical at the City of Plano, Texas.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | P-1024021 |
| Status | Inactive |
| City | Irving |
- According to the City of Irving Inspection Department, 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 Blackall Mechanical at the City of Irving Inspection Department.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | M-1020853 |
| Status | Inactive |
| City | Irving |
- According to the City of Irving Inspection Department, 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 Blackall Mechanical at the City of Irving Inspection Department.
This is a sample of licensing data; click here to access a complete history.
93
BuildZoom Score
Insured
| Insurer | Cert Of Ins |
176
Permits
- Building permit records show that Blackall Mechanical has worked on 176 permitted projects.
Blackall Mechanical Employees
BM
Blackall Mechanical
Owner
BI
Blackall Mechanical Inc
Owner
BP
Blackall, John P
Owner
JM
John Blackall/Frankie Moeller
Owner
MA
Marvin Allison
NN
None None
None
SW
Seel William
Owner
WS
William E Seel
None
WS
William E. Seel
Owner
WS
William Seel
Owner
WJ
William Seel Jr
Applicant
WH
William Seel Jr License Holder
Owner