Updated: Jun 06, 2026
Location and Projects
Address
7529 S Storm Mtn, Littleton, CO, 80127
Use our bidding system to
request a quote
L&M Underground Construction
L&M Underground, Inc, 7529 S Storm Mtn, Littleton, CO (Owned by: Clemente Estrada) holds a Single Trade license and 46 other licenses according to the Castle Rock license board.
Their BuildZoom score of 106 ranks in the top 7% of 55,949 Colorado licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring L&M Underground, Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
L&M Underground, Inc Services
Start a project today:
L&M Underground, Inc Contact Information
Phone Number: (303) 933-1970
Address: 7529 S Storm Mtn, Littleton, CO 80127
L&M Underground, Inc Littleton
Quality
106
93rd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
L&M Underground, Inc has a BuildZoom score of 106, which places them above 93% of 55,949 contractors in Colorado.
Activity
|
3 projects
|
2025 |
|
3 projects
|
2024 |
|
10 projects
|
2023 |
Our building permit records indicate that L&M Underground, Inc has worked on at least
16.0 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.
Pricing
|
4 projects
|
$5k-$20k |
|
1 project
|
$50k-$100k |
|
1 project
|
$500k-$1mil |
The typical size of their permits is approximately $18,000. 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.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Replace all hvac. total affected area of work is 1 560 sq. ft
Valuation:
$700,000
Permit #:
25-0173
Status:
final
Fee:
$12,934
Permit Type:
N/A
Building Type:
N/A
Interior office space building out with mezzanine in the north west corner of existing warehouse. no change in use or change in occupancy
Valuation:
$18,000
Permit #:
2023-ELEC-0000133
Status:
final
Fee:
$263
Permit Type:
N/A
Building Type:
Commercial
Remodel addition of new home upgrade with new modern electrical service 200 amp
Valuation:
$16,000
Permit #:
2023-ELEC-0001792
Status:
final
Fee:
$147
Permit Type:
N/A
Building Type:
Single family res...
Replacement of 6 hood with new 8 type 1 hood hood and ansul system for sprouts. work to include installation/alteration of electrical and plumbing/gas to accommodate new hood and oven. job contact - scott pollard - 303-918-2266
Valuation:
$49,995
Permit #:
B1915212
Status:
complete
Fee:
$2,191
Permit Type:
N/A
Building Type:
N/A
7900 w quincy ave - tenant improvement - costco new refrigeration equipment enclosure
Valuation:
$350,000
Permit #:
2018-ELEC-0006621
Status:
final
Fee:
$2,170
Permit Type:
N/A
Building Type:
Commercial
Install new kitchen equipment for deli sprouts 8601 w. cross drive addition electrical gas pipe and plumbing for new combi-oven appliance @ sprouts farmers market deli area
Valuation:
$2,700
Permit #:
2019-ELEC-0014479
Status:
final
Fee:
$43
Permit Type:
N/A
Building Type:
N/A
Residential electrical - subpanel or service change up to 200 amps
2021-06-29
Electrical wiring of detached garage including lights receptacles and underground power from phone
Valuation:
$5,000
Permit #:
BDP21-2119
Status:
issued
Fee:
$102
Permit Type:
New
Building Type:
N/A
Sprouts addition of beer case and relocated bread case
Valuation:
$80,000
Permit #:
COMM19-00124
Status:
expired
Fee:
$3,853
Permit Type:
Tenant finish
Building Type:
N/A
Wiring of existing garage lights/gfci receptacles. existing 200 amp service to home
Valuation:
$3,000
Permit #:
2021-ELEC-0014239
Status:
issued
Fee:
$43
Permit Type:
N/A
Building Type:
Garage
Leak detection for the cooler that is being replaced and rebuilt
Valuation:
$20,000
Permit #:
2023-FIRE-0006621
Status:
issued
Fee:
$269
Permit Type:
N/A
Building Type:
N/A
Sprouts new meat freezer beer cooler and produce bin
Valuation:
$30,000
Permit #:
21-0476
Status:
final
Fee:
$1,541
Permit Type:
Landlord improvement
Building Type:
N/A
Dobkin basement finish previously finished w added construct
Valuation:
N/A
Permit #:
RES23-0517
Status:
final
Fee:
$469
Permit Type:
Basement finish
Building Type:
N/A
Replace outdated electrical panel
Valuation:
$20,000
Permit #:
2021-LOG-0005744
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Directional bore under reservoir road and install electrical conduit that will tie into new solar panels
Valuation:
N/A
Permit #:
ROW2019-00907
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace outdated electrical panel
Valuation:
$10,000
Permit #:
2021-ELEC-0005676
Status:
final
Fee:
$199
Permit Type:
N/A
Building Type:
Commercial
Bore to cross street with new electric
Valuation:
$5,400
Permit #:
ROW23-01438
Status:
expired
Fee:
$906
Permit Type:
Electric
Building Type:
N/A
Sprouts walk in cooler replace new and relocated sinks
Valuation:
$150,000
Permit #:
COMM18-00188
Status:
final
Fee:
$6,246
Permit Type:
Tenant finish
Building Type:
N/A
New electric service upgrade. new wiring for tortilla machine
Valuation:
$13,000
Permit #:
BP-20-00001
Status:
final
Fee:
$223
Permit Type:
N/A
Building Type:
N/A
Bore and install 14 irrigation sleeve crossing westmoor dr
Valuation:
N/A
Permit #:
ROW22-0589
Status:
final
Fee:
$50
Permit Type:
Right of way
Building Type:
N/A
Fiber sleeves under road
Valuation:
N/A
Permit #:
ROW23-00517
Status:
final
Fee:
$686
Permit Type:
N/A
Building Type:
N/A
L&M Underground, Inc Reviews
BuildZoom hasn't received any reviews for L&M Underground, Inc. Click here to be alerted when reviews are posted about them.
Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
L&M Underground, Inc License info
Verified License
| License # | CR25-0025 |
| Status | Active |
| Town | Castle Rock |
| Type | Single Trade |
| Date Issued | 02-12-2026 |
| Business Type | Corporation |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for L&M Underground, Inc at the Castle Rock Town, Colorado.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 25-000163 |
| Status | Active |
| City | Lafayette |
| Type | Special Contractor |
| Business Type | Corporation |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for L&M Underground, Inc at the City of Lafayette.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | AEC1872 |
| Status | Active |
| Town | Parker |
| Type | Contractor |
| Business Type | Corporation |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for L&M Underground, Inc at the The Town of Parker, Colorado.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | CL-005460-2024 |
| Status | Active |
| City | Centennial |
| Type | Utility |
| Class | Utility |
| Date Issued | 11-13-2025 |
| Business Type | Corporation |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for L&M Underground, Inc at the Centennial Community Development Contractor Licensing.
This is a sample of licensing data; click here to access a complete history.
Verified License
| Status | Active |
| City | Denver |
| Type | Electrical |
| Business Type | Corporation |
- BuildZoom verified this license was active as of May 2026.
This is a sample of licensing data; click here to access a complete history.
Verified License
| Status | Active |
| City | Aurora |
| Type | Right Of Way Contractor |
| Business Type | Corporation |
- BuildZoom verified this license was active as of June 2026.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 6610 |
| Status | Active |
| State | Colorado |
| Type | Electrical Contractor |
| Business Type | Corporation |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for L&M Underground, Inc at the Colorado Division of Professions and Occupations.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | AEC1471 |
| Status | Active |
| Town | Parker |
| Type | Contractor |
| Business Type | Corporation |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for L&M Underground, Inc at the The Town of Parker, Colorado.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | LIC-0008221-ROW |
| Status | Active |
| City | Boulder |
| Type | Right Of Way |
| Class | Right-of-Way |
| Date Issued | 11-18-2025 |
| Business Type | Corporation |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for L&M Underground, Inc at the Boulder Licensing Board.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| Status | Active |
| State | Florida |
| Type | Construction Business Information |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of December, 2025. Check the current license status of L&M Underground, Inc with the Florida Department of Business & Professional Regulation
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 080831001 |
| Status | Active |
| City | Westminster |
| Type | Public Way Contractor |
| Business Type | Corporation |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for L&M Underground, Inc at the City of Westminster, Colorado.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 161192 |
| Status | Active |
| State | Arizona |
| Type | General Commercial |
| Business Type | Corporation |
- BuildZoom verified this license was active as of October 2025.
Verify this license's status for L&M Underground, Inc at the Arizona Registrar of Contractors.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 060531003 |
| Status | Active |
| City | Westminster |
| Type | Electrical Contractor |
| Business Type | Corporation |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for L&M Underground, Inc at the City of Westminster, Colorado.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | LCC2015056966 |
| Status | Active |
| City | Thornton |
| Type | Class D Excavation/Grading Expires 2026 10 15 |
| Business Type | Corporation |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for L&M Underground, Inc at the Thornton City Development Contractor License.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| Status | Active |
| City | Denver |
| Type | Row Excavator |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of August, 2025. Check the current license status of L&M Underground, Inc with the City and County of Denver Community Planning and Development
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | SPC2240518 |
| Status | Active |
| City | Lafayette |
| Type | Special Contractor |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of March, 2022. Check the current license status of L&M Underground, Inc with the City of Lafayette
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| Status | Active |
| City | Denver |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of May, 2020. Check the current license status of L&M Underground, Inc with the City and County of Denver Community Planning and Development
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| Status | Active |
| City | Denver |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of October, 2020. Check the current license status of L&M Underground, Inc with the City and County of Denver Community Planning and Development
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | LIC-0008221 |
| Status | Active |
| City | Boulder |
| Type | Right Of Way |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of December, 2018. Check the current license status of L&M Underground, Inc with the Boulder Licensing Board
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 1471 |
| Status | Active |
| City | Arvada |
| Type | Row Contractor, General Utility |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of September, 2015. Check the current license status of L&M Underground, Inc with the The City of Arvada, Colorado
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 48538 |
| Status | Active |
| State | Nebraska |
| Type | Contractor |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of September, 2017. Check the current license status of L&M Underground, Inc with the Nebraska Department of Labor
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 27372 |
| Status | Active |
| City | Thornton |
| Type | Excavation/Utility |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of September, 2015. Check the current license status of L&M Underground, Inc with the Thornton City Development Contractor License
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | EC.0006610 |
| Status | Active |
| State | Colorado |
| Type | Electrical Contractor |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of November, 2017. Check the current license status of L&M Underground, Inc with the Colorado Division of Professions and Occupations
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 0008221 |
| Status | Active |
| City | Boulder |
| Type | Right-Of-Way |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of September, 2015. Check the current license status of L&M Underground, Inc with the Boulder Licensing Board
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 25542 |
| Status | Active |
| City | Thornton |
| Type | Excavation/Utility |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of September, 2015. Check the current license status of L&M Underground, Inc with the Thornton City Development Contractor License
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 28758 |
| Status | Active |
| County | Douglas County |
| Type | Master Electrical |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of November, 2017. Check the current license status of L&M Underground, Inc with the Douglas County Building Division
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | ME-1045 |
| Status | Active |
| Type | Sub Contractor |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of November, 2017.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 1483 |
| Status | Active |
| Town | Parker |
| Type | Contractor, Electrical |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of November, 2017. Check the current license status of L&M Underground, Inc with the The Town of Parker, Colorado
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | CEN-13-02922 |
| Status | Active |
| City | Centennial |
| Type | Utility Contractor |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of September, 2015. Check the current license status of L&M Underground, Inc with the Centennial Community Development Contractor Licensing
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 21989 |
| Status | Active |
| City | Thornton |
| Type | Electrical |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of November, 2017. Check the current license status of L&M Underground, Inc with the Thornton City Development Contractor License
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 44819 |
| Status | Active |
| State | North Dakota |
| Type | Corporation |
| Class | Class A - Unlimited contract amount |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of May, 2016. Check the current license status of L&M Underground, Inc with the North Dakota Secretary of State
This is a sample of licensing data; click here to access a complete history.
Unverified License
| License # | 20-3954 |
| Status | Unable To Verify |
| Town | Castle Rock |
| Type | Single Trade |
| Business Type | Corporation |
- 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 # | 21-040518 |
| Status | Inactive |
| City | Lafayette |
| Type | Special Contractor |
| Business Type | Corporation |
- According to the City of Lafayette, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for L&M Underground, Inc at the City of Lafayette.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | ME-1045 |
| Status | Inactive |
| City | Fort Collins |
| Type | Sub Contractor |
| Business Type | Corporation |
- According to the City of Fort Collins, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for L&M Underground, Inc at the City of Fort Collins.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| City | Aurora |
| Type | Right Of Way Contractor |
| Business Type | Corporation |
- According to the Aurora, Colorado, the status of this license was at one point cancelled. However, this information may have changed.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | AEC2849 |
| Status | Inactive |
| Town | Parker |
| Type | Contractor |
| Business Type | Corporation |
- According to the The Town of Parker, Colorado, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for L&M Underground, Inc at the The Town of Parker, Colorado.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | SPC2456627 |
| Status | Inactive |
| City | Lafayette |
| Type | Special Contractor |
| Business Type | Corporation |
- According to the City of Lafayette, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for L&M Underground, Inc at the City of Lafayette.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CUC1225444 |
| Status | Inactive |
| State | Florida |
| Type | Certified Underground Utility And Excavation Contractor |
| Business Type | Corporation |
- According to the Florida Department of Business & Professional Regulation, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for L&M Underground, Inc at the Florida Department of Business & Professional Regulation.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | AEC3713 |
| Status | Inactive |
| Town | Parker |
| Type | Contractor |
| Business Type | Corporation |
- According to the The Town of Parker, Colorado, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for L&M Underground, Inc at the The Town of Parker, Colorado.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| City | Denver |
| Type | Electrical |
| Business Type | Corporation |
- According to the City and County of Denver Community Planning and Development, the status of this license was at one point cancelled. However, this information may have changed.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| City | Aurora |
| Type | Right Of Way Contractor |
| Business Type | Corporation |
- According to the Aurora, Colorado, the status of this license was at one point cancelled. However, this information may have changed.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | E050548 |
| Status | Inactive |
| County | Douglas County |
| Type | Electrical |
| Business Type | Corporation |
- According to the Douglas County Building Division, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for L&M Underground, Inc at the Douglas County Building Division.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | E00260 |
| Status | Inactive |
| City | Littleton |
| Type | Class E |
| Business Type | Corporation |
- According to the The City of Littleton, CO, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for L&M Underground, Inc at the The City of Littleton, CO.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | AEC5904 |
| Status | Inactive |
| City | Arvada |
| Type | Contractor |
| Business Type | Corporation |
- According to the The City of Arvada, Colorado, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for L&M Underground, Inc at the The City of Arvada, Colorado.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | LCC2015014298 |
| Status | Inactive |
| City | Thornton |
| Type | Class D Electrical |
| Business Type | Corporation |
- According to the Thornton City Development Contractor License, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for L&M Underground, Inc at the Thornton City Development Contractor License.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | BONDED00142 |
| Status | Inactive |
| City | Littleton |
| Type | Contractor |
| Business Type | Corporation |
- According to the The City of Littleton, CO, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for L&M Underground, Inc at the The City of Littleton, CO.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 817283 |
| Status | Inactive |
| State | California |
| Type | Low Voltage Systems |
| Business Type | Corporation |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for L&M Underground, Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
106
BuildZoom Score
Insured
| Insurer | American Family Ins Co |
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Workers' Compensation History |
305
Permits
- Building permit records show that L&M Underground, Inc has worked on 305 permitted projects.
L&M Underground, Inc Employees
CE
Clemente Estrada
Owner
CE
Clemente R Estrada
LU
L&M Underground
Contractor
LE
Lone Star Electric
Owner
LL
Lone Star Electric Llc
LS
Lori Jo Slater
Officer
LS
Lori Slater
Owner
LS
Lori Slater Secretary/Treasurer
Contact
MS
Michael Lloyd Slater
Rmo / Ceo / Pres
MS
Michael Slater
Owner
MS
Mike Slater