Updated: Jun 23, 2026
Location and Projects
Address
5156 W 58TH AVE, Arvada, CO, 80002
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Ducts UnLtd Mechanical Systems
Ducts UnLtd Mechanical Systems, 5156 W 58th Ave, Arvada, CO (Owned by: Robert & Elissa Leishman) holds a Plumbing license and 37 other licenses according to the Centennial license board.
Their BuildZoom score of 110 ranks in the top 4% of 55,949 Colorado licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Ducts UnLtd Mechanical Systems, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Ducts UnLtd Mechanical Systems Services
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Ducts UnLtd Mechanical Systems Contact Information
Phone Number: (303) 657-3592
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Address: 5156 W 58TH AVE, Arvada, CO 80002
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Ducts UnLtd Mechanical Systems Arvada
Quality
110
96th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Ducts UnLtd Mechanical Systems has a BuildZoom score of 110, which places them above 96% of 55,949 contractors in Colorado.
Activity
|
89 projects
|
2025 |
|
95 projects
|
2024 |
|
74 projects
|
2023 |
Our building permit records indicate that Ducts UnLtd Mechanical Systems has worked on at least
258.0 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
|
101 projects
|
Commercial Renovations |
|
24 projects
|
Home Additions |
|
11 projects
|
New Constructions |
|
145 projects
|
HVAC projects |
|
110 projects
|
Mechanical projects |
Analyzing permits over the last 4 years shows that Ducts UnLtd Mechanical Systems mostly works on
hvac project
and mechanical project
projects.
Pricing
|
32 projects
|
< $5k |
|
58 projects
|
$5k-$20k |
|
53 projects
|
$20k-$50k |
|
37 projects
|
$50k-$100k |
|
42 projects
|
$100k-$250k |
|
25 projects
|
$250k-$500k |
|
14 projects
|
$500k-$1mil |
|
11 projects
|
$1mil+ |
The typical size of their permits is approximately $35,975. 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.
Building Permits by Ducts UnLtd Mechanical Systems
This is a sample of this contractor's permits. Click here to access their complete permit history.
Comcast elevator project - install new (3) stop elevator in cmu shaft wall. new elevator pit - plumbing & electrical for elevator pit. mechanical electrical plumbing & fire alarm upgrades. structural steel modifications. modify & install new doors. minor finishes upgrades - drywall paint flooring lighting
Valuation:
$1,200,000
Permit #:
CEN-25-00071
Status:
complete
Fee:
$27,269
Permit Type:
N/A
Building Type:
N/A
Ringcentral remodel of existing tenant improvements. construction of metal stud partitions to underside of existing ceiling grid. relocation of existing lighting fixtures. installation of new electrical and data outlets. redistribution of existing hvac system. new breakroom millwork with plumbing work (sink disposal hot water heater). new finishes
Valuation:
$300,000
Permit #:
CEN-24-00328
Status:
complete
Fee:
$8,123
Permit Type:
N/A
Building Type:
N/A
Ringcentral remodel of existing tenant improvements. construction of metal stud partitions to underside of existing ceiling grid. relocation of existing lighting fixtures. installation of new electrical and data outlets. redistribution of existing hvac system. new millwork with plumbing work (sink disposal hot water heater). new finishes
Valuation:
$250,000
Permit #:
CEN-24-00327
Status:
complete
Fee:
$7,073
Permit Type:
N/A
Building Type:
N/A
Tenant improvements within an existing core/shell space (12 745 suite). work includes the development of office research and support spaces. building occupancy square footage and egressing to remain unchanged
Valuation:
$1,500,000
Permit #:
COM-0784-2024
Status:
final
Fee:
$784,516
Permit Type:
N/A
Building Type:
N/A
Ringcentral remodel of existing tenant improvements. construction of metal stud partitions to underside of existing ceiling grid. relocation of existing lighting fixtures. installation of new electrical and data outlets. redistribution of existing hvac system. new breakroom millwork with plumbing work (sink disposal hot water heater). new finishes
Valuation:
$200,000
Permit #:
CEN-24-00329
Status:
complete
Fee:
$5,624
Permit Type:
N/A
Building Type:
N/A
New tenant finish remodel of existing tenant space. addition new open office area/new break area/new unisex restrooms. new warehouse area. new lighting/new finishes. new electrical/mech remodel engineering plans included. existing electrical service added under previous white box permit. remodel area; 2698 sf office area/4740 sf of warehouse space. total 7438 sf
Valuation:
$398,680
Permit #:
B202500188
Status:
complete
Fee:
$14,461
Permit Type:
N/A
Building Type:
N/A
1400 16th st - ibotta offices 4-6th flrs - tenant finish ibotta 3-floor (4th 5th and 6th flrs) buildout to include all new finishes throughout. valuation has been included in the attachments. will be updated prior to permit issue. please note: new interior stair to be submitted separately for permit review
Valuation:
$1,621,300
Permit #:
2025-MECH-0003518
Status:
issued
Fee:
$8,280
Permit Type:
N/A
Building Type:
Commercial
This is a second generation tenant finish project. the existing tenant space will be renovated but no change shall be made to the existing core elements building footprint height or area calculations
Valuation:
$262,370
Permit #:
2025-MECH-0001663
Status:
final
Fee:
$1,683
Permit Type:
N/A
Building Type:
Commercial
Tenant finish of 5577 square feet for krazy karl's pizza to include expanding into unit 120. the existing space of 4073 square feet will expand into the 1504 square feet adjacent vacant unit 120. expanding the kitchen customer pick up area support spaces millwork finished power lighting plumbing and hvac distribution to serve the expanded areas. will include the addition of a make-up ... see more
Valuation:
$200,000
Permit #:
B2501737
Status:
complete
Fee:
$6,799
Permit Type:
N/A
Building Type:
N/A
17th floor tennant renovation of an existing building. scope includes private offices conference rooms and breakroom. addition of new ada compliant single user restroom
Valuation:
$273,000
Permit #:
2025-MECH-0000529
Status:
final
Fee:
$1,864
Permit Type:
N/A
Building Type:
Commercial
1551 wewatta st - vf corp - tenant finish the project is an office building tenant remodel by the existing tenant. the work to be done is a remodel of an area on the second floor from the current office/business use to an assembly space that can be configured for larger meetings
Valuation:
$85,000
Permit #:
2025-MECH-0001707
Status:
final
Fee:
$915
Permit Type:
N/A
Building Type:
Commercial
Tenant improvement on second level including selective demolition mep/fp new partitions ceilings finishes and life safety improvements
Valuation:
$304,103
Permit #:
COM-0853-2025
Status:
issued
Fee:
$13,016
Permit Type:
N/A
Building Type:
N/A
Tenant improvement on first floor including selective demolition mep/fp new partitions ceiling finishes and life safety improvements
Valuation:
$445,189
Permit #:
COM-0854-2025
Status:
triage
Fee:
$17,911
Permit Type:
N/A
Building Type:
N/A
Demolition and construction for white box condition of suite 400. improvements include removal of existing ceiling tile grid & lighting carpet and select partition walls. installation of two new overhead rolling doors on east and west facades high bay lighting & mop sink. mechanical is updated for open ceiling condition
Valuation:
$142,000
Permit #:
CEN-25-00158
Status:
issued
Fee:
$4,265
Permit Type:
N/A
Building Type:
N/A
Also energy-new tenant finish remodel of existing tenant space. addition minimal demolition of existing areas for new break area/work room existing office/new open office-production work area/open warehouse. existing restrooms to remain. new lighting/new finishes throughout. new/remodel of elec/mech engineering plans included. remodel area; 8000 sf of existing 24102 sf
Valuation:
$588,265
Permit #:
B202405343
Status:
issued
Fee:
$20,806
Permit Type:
N/A
Building Type:
N/A
Level 2 tenant improvement to consolidate floor to single tenant. new light fixtures and finishes and relocation of hvac and life safety components. tenant finish project inclusive of demolition framing hvac electrical plumbing structural for new operable partition and misc. finish work. temp trash shoot
Valuation:
$1,650,000
Permit #:
CEN-24-00233
Status:
complete
Fee:
$38,265
Permit Type:
N/A
Building Type:
N/A
Levels 03 and 04 of the nichols building will be renovated to align to reflect bpx's standard. the scope of work includes selective demolition of existing floors new construction of partitions millwork equipment lighting mechanical electrical plumbing and finishes including security audiovisual and fire protection. level 03: 15 767 sf level 04: 15 299 sf total: 31 066 sf
Valuation:
$700,000
Permit #:
2024-MECH-0002384
Status:
final
Fee:
$3,960
Permit Type:
N/A
Building Type:
Commercial
3833 n steele st - skiptown - new bar & doggy daycare - tenant finish skiptown is a new bar and dog daycare concept with grooming on site and large open areas for socializing dogs and people. skiptown will be located at york street yards 3833 n. steele street. skiptown will include a bar with a seating vestibule gates to separate dogs from the serving area kennels for dog stays groomi... see more
Valuation:
$589,888
Permit #:
2024-MECH-0001812
Status:
final
Fee:
$3,438
Permit Type:
N/A
Building Type:
N/A
Safeway tenant finish of 34 000 sq. ft. to include selective demolition of existing interior fixtures and installation of new fixtures finishes and repairs. minor repairs and paint to exterior canopy. job contact: jake scott 806-517-0654
Valuation:
$1,750,000
Permit #:
B2403909
Status:
issued
Fee:
$55,387
Permit Type:
N/A
Building Type:
N/A
The project scope includes the interior renovation of existing office space to addition a new single occupant unisex toilet room with new fixtures and finishes. selective demolition of existing non-structural partitions will be performed and new partitions constructed to provide the toilet room and a storage room. fire alarm and fire sprinklers will be accomplished by means of deferre... see more
Valuation:
$20,000
Permit #:
2025-MECH-0000742
Status:
final
Fee:
$279
Permit Type:
N/A
Building Type:
N/A
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Ducts UnLtd Mechanical Systems License info
Verified License
| License # | CL-08775 |
| Status | Active |
| City | Centennial |
| Type | Plumbing |
| Class | Plumbing |
| Date Issued | 01-21-2026 |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Ducts UnLtd Mechanical Systems at the Centennial Community Development Contractor Licensing.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 22-099021 |
| Status | Active |
| City | Lafayette |
| Type | Mechanical Contractor |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Ducts UnLtd Mechanical Systems at the City of Lafayette.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | CL-08765 |
| Status | Active |
| City | Centennial |
| Type | General |
| Class | HVAC |
| Date Issued | 05-07-2026 |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Ducts UnLtd Mechanical Systems 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 | Plbg A |
- 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
| Status | Active |
| City | Denver |
| Type | H & V A |
- 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
| Status | Active |
| City | Denver |
| Type | Refrigeration A |
- 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
| Status | Active |
| City | Denver |
| Type | Steam & Hot Water |
- 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 # | 3375 |
| Status | Active |
| State | Colorado |
| Type | Plumbing Contractor |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Ducts UnLtd Mechanical Systems at the Colorado Division of Professions and Occupations.
This is a sample of licensing data; click here to access a complete history.
Verified License
| Status | Active |
| City | Aurora |
| Type | Mechanical Systems Contractor |
- BuildZoom verified this license was active as of June 2026.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | CL1179 |
| Status | Active |
| County | Larimer County, Co |
| Type | Mechanical Commercial |
| Class | Commercial |
- When BuildZoom last verified this license, it had an expiration date of May, 2023. Check the current license status of Ducts UnLtd Mechanical Systems with the Larimer County
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Verified License
| License # | AEC1306 |
| Status | Active |
| Town | Parker |
| Type | Contractor |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Ducts UnLtd Mechanical Systems at the The Town of Parker, Colorado.
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Verified License
| Status | Active |
| City | Aurora |
| Type | Plumbing |
- 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 # | P150244 |
| Status | Active |
| County | Douglas County |
| Type | Plumbing |
- BuildZoom verified this license was active as of September 2025.
Verify this license's status for Ducts UnLtd Mechanical Systems at the Douglas County Building Division.
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Verified License
| License # | MA00024 |
| Status | Active |
| County | Douglas County |
| Type | Mechanical A |
- BuildZoom verified this license was active as of September 2025.
Verify this license's status for Ducts UnLtd Mechanical Systems at the Douglas County Building Division.
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Verified License
| License # | 151130033 |
| Status | Active |
| City | Westminster |
| Type | Plumbing Contractor |
| Date Issued | 05-05-2026 |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Ducts UnLtd Mechanical Systems at the City of Westminster, Colorado.
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Verified License
| License # | 060228114 |
| Status | Active |
| City | Westminster |
| Type | General Contractor |
| Date Issued | 10-28-2025 |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Ducts UnLtd Mechanical Systems at the City of Westminster, Colorado.
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Verified License
| License # | P00393 |
| Status | Active |
| City | Littleton |
| Type | Contractor |
| Date Issued | 12-03-2025 |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Ducts UnLtd Mechanical Systems at the The City of Littleton, CO.
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Verified License
| License # | D11102 |
| Status | Active |
| City | Littleton |
| Type | Contractor |
| Date Issued | 12-08-2025 |
- BuildZoom verified this license was active as of April 2026.
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Verified License
| License # | LCC2015004388 |
| Status | Active |
| City | Thornton |
| Type | Class D Plumbing/Mechanical Expires 2027 02 15 |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Ducts UnLtd Mechanical Systems at the Thornton City Development Contractor License.
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Verified License
| License # | H-2019 |
| Status | Active |
| City | Fort Collins |
| Type | Sub Contractor |
- BuildZoom verified this license was active as of April 2026.
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License Not Verified
| Status | Active |
| County | Jefferson County |
| Type | Class A Mechanical (Unrestricted) |
| Class | Unrestricted |
- When BuildZoom last verified this license, it had an expiration date of December, 2023. Check the current license status of Ducts UnLtd Mechanical Systems with the Jefferson County Licensed Contractors
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License Not Verified
| License # | 1816 |
| Status | Active |
| City | Arvada |
| Type | Bid Contractor, Mechanical |
- When BuildZoom last verified this license, it had an expiration date of December, 2015. Check the current license status of Ducts UnLtd Mechanical Systems with the The City of Arvada, Colorado
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License Not Verified
| License # | 26307 |
| Status | Active |
| City | Thornton |
| Type | Mechanical/Plumbing |
- When BuildZoom last verified this license, it had an expiration date of February, 2015. Check the current license status of Ducts UnLtd Mechanical Systems with the Thornton City Development Contractor License
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License Not Verified
| License # | PC.0003375 |
| Status | Active |
| State | Colorado |
| Type | Plumbing Contractor |
- When BuildZoom last verified this license, it had an expiration date of February, 2019. Check the current license status of Ducts UnLtd Mechanical Systems with the Colorado Division of Professions and Occupations
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License Not Verified
| License # | 1306 |
| Status | Active |
| Town | Parker |
| Type | Contractor, Mechanical |
- When BuildZoom last verified this license, it had an expiration date of March, 2016. Check the current license status of Ducts UnLtd Mechanical Systems with the The Town of Parker, Colorado
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License Not Verified
| License # | 0006020 |
| Status | Active |
| City | Boulder |
| Type | Mechanical Class B Commercial & Residential |
- When BuildZoom last verified this license, it had an expiration date of February, 2015. Check the current license status of Ducts UnLtd Mechanical Systems with the Boulder Licensing Board
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License Not Verified
| License # | 187401 |
| Status | Active |
| County | Douglas County |
| Type | Master Plumbing |
- When BuildZoom last verified this license, it had an expiration date of February, 2019. Check the current license status of Ducts UnLtd Mechanical Systems with the Douglas County Building Division
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License Not Verified
| License # | CEN-13-01287 |
| Status | Active |
| City | Centennial |
| Type | HVAC Contractor |
- When BuildZoom last verified this license, it had an expiration date of April, 2017. Check the current license status of Ducts UnLtd Mechanical Systems 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 # | 24321 |
| Status | Active |
| City | Thornton |
| Type | Mechanical |
- When BuildZoom last verified this license, it had an expiration date of February, 2015. Check the current license status of Ducts UnLtd Mechanical Systems with the Thornton City Development Contractor License
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Inactive License
| License # | MP-1026 |
| Status | Inactive |
| City | Fort Collins |
| Type | Sub Contractor |
- According to the City of Fort Collins, 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 Ducts UnLtd Mechanical Systems 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 | Plumbing |
- According to the Aurora, Colorado, 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 | Aurora |
| Type | Mechanical Systems Contractor |
- According to the Aurora, Colorado, 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 | Aurora |
| Type | Plumbing Contractor |
- According to the Aurora, Colorado, 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 # | LIC-0006020-MECHB |
| Status | Inactive |
| City | Boulder |
| Type | Mechanical |
| Class | Class B Commercial and Residential |
- According to the Boulder Licensing Board, 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 Ducts UnLtd Mechanical Systems at the Boulder Licensing Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | LIC-0006020-PLBG |
| Status | Inactive |
| City | Boulder |
| Type | Plumbing |
| Class | Plumbing |
- According to the Boulder Licensing Board, 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 Ducts UnLtd Mechanical Systems at the Boulder Licensing Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| City | Denver |
- 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. 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 # | D11486 |
| Status | Inactive |
| City | Littleton |
| Type | Class D |
- According to the The City of Littleton, CO, 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 Ducts UnLtd Mechanical Systems at the The City of Littleton, CO.
This is a sample of licensing data; click here to access a complete history.
Unverified License
| License # | AEC1816 |
| Status | Unable To Verify |
| City | Arvada |
| Type | Contractor |
| Date Issued | 05-01-2026 |
- 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.
110
BuildZoom Score
Insured
| Insurer | Auto Owners Ins |
2.6K
Permits
- Building permit records show that Ducts UnLtd Mechanical Systems has worked on 2575 permitted projects.
Ducts UnLtd Mechanical Systems Employees
CL
Cliff Lamont
Owner
CL
Clifton Lamont
Owner
DH
Ducts Unlimited Mech Sys H2
Owner
DS
Ducts Unlimited Mech Systems
Owner
DH
Ducts Unlimited Mechanical H1
Owner
DP
Ducts Unlimited Mechanical P
Owner
DI
Ducts Unlimited Mechanical Systems Inc
JM
Jeffery A Mazzagatte
Co Owner
JM
Jeffery Mazzagatte
RL
Robert & Elissa Leishman
Owner
RL
Robert Leishman
Owner
RL
Robert Lsishman