Updated: May 19, 2026
Location and Projects
Address
3408 OATES DR, Mesquite, TX, 75150
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Welsh, Elizabeth Madeleine Locke HVAC/Mechanical Contractor
Welsh, Elizabeth Madeleine Locke, 3408 Oates Dr, Mesquite, TX (Employees: David Barcelo and Db Mechanical) holds a Mechanical Contractor license and 19 other licenses according to the Plano license board.
Their BuildZoom score of 92 ranks in the top 32% of 222,249 Texas licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Welsh, Elizabeth Madeleine Locke, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Welsh, Elizabeth Madeleine Locke Services
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Welsh, Elizabeth Madeleine Locke Contact Information
Phone Number: (972) 682-8930
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Address: 3408 OATES DR, Mesquite, TX 75150
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Welsh, Elizabeth Madeleine Locke Reviews
5 out of 5 stars, based on
1
review
-
By TuckerJune 25, 2014Awesome Service!!
Building Permits by Welsh, Elizabeth Madeleine Locke
This is a sample of this contractor's permits. Click here to access their complete permit history.
2500 sf vintage legacy lakes - 7 unit fire damage
Valuation:
$300,000
Permit #:
B20-01370
Status:
complete
Fee:
$1,383
Permit Type:
Malt
Building Type:
N/A
Tfo- total men's primary care
Valuation:
N/A
Permit #:
2109-0215
Status:
final
Fee:
N/A
Permit Type:
Interior remodel
Building Type:
N/A
One stop nutrition- interior finish out
Valuation:
$47,950
Permit #:
COMR18-00136
Status:
complete
Fee:
$1,436
Permit Type:
N/A
Building Type:
N/A
Remodel-new roof replace windows remove interior walls cover beam remove front arches only meps
Valuation:
N/A
Permit #:
M1906-0099
Status:
final
Fee:
N/A
Permit Type:
Single family dwe...
Building Type:
N/A
General rehab- new windows, flooring cabinets, doors, mep's
Valuation:
N/A
Permit #:
M1910-0009
Status:
final
Fee:
N/A
Permit Type:
Single family dwe...
Building Type:
N/A
350 sq ft salt patio cover & arbor
Valuation:
$92,700
Permit #:
B18-00209
Status:
complete
Fee:
$1,146
Permit Type:
Salt
Building Type:
N/A
Install new 4 ton rooftop unit and ductwork
Valuation:
N/A
Permit #:
18-01767
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Commercial remodel retrofit of office area
Valuation:
N/A
Permit #:
PM18-03039
Status:
final
Fee:
$30
Permit Type:
General
Building Type:
N/A
3 ton split gas with duct work
Valuation:
$3,800
Permit #:
1802082003
Status:
complete
Fee:
N/A
Permit Type:
(b) alteration
Building Type:
Single family dwe...
3 ton ele w/duct work change out
Valuation:
$3,700
Permit #:
1801162001
Status:
complete
Fee:
N/A
Permit Type:
(b) alteration
Building Type:
Single family dwe...
No Description Available
Valuation:
N/A
Permit #:
PM18-10424
Status:
final
Fee:
$107
Permit Type:
General
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
PM18-08788
Status:
final
Fee:
$47
Permit Type:
General
Building Type:
N/A
1st time finish out
Valuation:
N/A
Permit #:
M1802-0077
Status:
final
Fee:
N/A
Permit Type:
Office/warehouse
Building Type:
N/A
4001-install new hvac
Valuation:
$3,500
Permit #:
1705152003
Status:
complete
Fee:
N/A
Permit Type:
(b) alteration
Building Type:
Single family dwe...
No Description Available
Valuation:
N/A
Permit #:
18 149852 000 00 MP
Status:
issued
Fee:
N/A
Permit Type:
Work associated w...
Building Type:
N/A
No Description Available
Valuation:
$1,500
Permit #:
MC1217-0095
Status:
final
Fee:
N/A
Permit Type:
Add/alt/repair/re...
Building Type:
N/A
Finish out of existing retail space 3rd party plan review only winston services inc
Valuation:
N/A
Permit #:
PM16-06486
Status:
final
Fee:
$53
Permit Type:
General
Building Type:
N/A
3948 sq ft cifo carter blood care
Valuation:
$240,000
Permit #:
B16-0577
Status:
complete
Fee:
$2,020
Permit Type:
Cifo
Building Type:
N/A
Install 1 remote terminal unit & ductwork - other miscellaneous ductwork. ava salon suites & spa
Valuation:
N/A
Permit #:
16-04707
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Commercial building permits - remodel
4117 Billy Mitchell Dr, Addison, TX
2014-10-31
Ind
Valuation:
$286,000
Permit #:
P0120141238
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Welsh, Elizabeth Madeleine Locke License info
Verified License
| License # | 23596 |
| Status | Active |
| City | Plano |
| Type | Mechanical Contractor |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Welsh, Elizabeth Madeleine Locke at the City of Plano, Texas.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | R13-0175 |
| Status | Active |
| City | Frisco |
| Type | Building |
| Date Issued | 10-15-2025 |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Welsh, Elizabeth Madeleine Locke at the The City of Frisco, TX.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | MC2818885 |
| Status | Active |
| Town | Litttle Elm |
| Type | Mechanical Contractor |
- When BuildZoom last verified this license, it had an expiration date of April, 2020. Check the current license status of Welsh, Elizabeth Madeleine Locke with the Town of Little Elm
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | MC6119549 |
| Status | Active |
| City | Lancaster |
| Type | Mechanical Contractor |
- When BuildZoom last verified this license, it had an expiration date of June, 2021. Check the current license status of Welsh, Elizabeth Madeleine Locke with the City of Lancaster
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | HVAC0500723 |
| Status | Active |
| City | Midlothian |
| Type | Mechanical Contractor |
- When BuildZoom last verified this license, it had an expiration date of May, 2023. Check the current license status of Welsh, Elizabeth Madeleine Locke with the City of Midlothian
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 Welsh, Elizabeth Madeleine Locke with the City of Dallas
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | MECH0016233 |
| Status | Active |
| City | Grapevine |
| Type | Mechanical Contractor |
- When BuildZoom last verified this license, it had an expiration date of December, 2017. Check the current license status of Welsh, Elizabeth Madeleine Locke with the City of Grapevine
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | TACLA00050858E |
| Status | Active |
| State | Texas |
| Type | Ae Air Conditioning/Refrigeration Contractor |
- When BuildZoom last verified this license, it had an expiration date of July, 2016. Check the current license status of Welsh, Elizabeth Madeleine Locke with the Texas Department of Licensing and Regulation
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 11336 |
| Status | Active |
| State | Texas |
| Type | Interior Designer |
- When BuildZoom last verified this license, it had an expiration date of May, 2017. Check the current license status of Welsh, Elizabeth Madeleine Locke with the Texas Board of Architectural Examiners
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | MECH0016233 |
| Status | Inactive |
| City | Grapevine |
| Type | Mechanical Contractor |
- According to the City of Grapevine, 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 Welsh, Elizabeth Madeleine Locke at the City of Grapevine.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 11336 |
| Status | Inactive |
| City | Keller |
| Type | Contractor |
- According to the The City of Keller, 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 Welsh, Elizabeth Madeleine Locke at the The City of Keller, TX.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| City | Waco |
| Type | City Insurance |
- According to the City of Waco, 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 Welsh, Elizabeth Madeleine Locke at the City of Waco.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 50858 |
| Status | Inactive |
| City | Waco |
| Type | Mechanical |
- According to the City of Waco, 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 Welsh, Elizabeth Madeleine Locke at the City of Waco.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | MECH4174573 |
| Status | Inactive |
| City | Farmers Branch |
| Type | Mechanical 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 Welsh, Elizabeth Madeleine Locke at the City of Farmers Branch.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | MEC0760913 |
| Status | Inactive |
| County | Denton |
| Type | Heat / Air Mechanical |
- 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.
Check this license's status for Welsh, Elizabeth Madeleine Locke at the Denton County.
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 # | ME-002821-2017 |
| Status | Inactive |
| City | Mesquite |
| Type | Mechanical Contractor |
| Class | Mechanical Contractor |
- According to the City of Mesquite, 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 Welsh, Elizabeth Madeleine Locke at the City of Mesquite.
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 | Arlington |
- According to the City of Arlington, 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.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | W006426 |
| Status | Inactive |
| City | Fort Worth |
| Type | Mech Env Ac & Heating Reg (A License) |
- According to the City of Fort Worth Planning and Development, 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 Welsh, Elizabeth Madeleine Locke at the City of Fort Worth Planning and Development.
This is a sample of licensing data; click here to access a complete history.
92
BuildZoom Score
114
Permits
- Building permit records show that Welsh, Elizabeth Madeleine Locke has worked on 114 permitted projects.
Welsh, Elizabeth Madeleine Locke Employees
DB
David Barcelo
Owner
DM
Db Mechanical
Owner
WL
Welsh, Elizabeth Madeleine Locke
Owner
I reccomend this outfit to everyone. Punctual, Polite, Professional, Hard Working and Delivered a quality complete AC system at an affordable price in a time of need for my family of six. Thank You!