Updated: Jul 11, 2026
Location and Projects
Address
4161 MULLIGAN ST, Longmont, CO, 80504
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Maddison Mechanical LLC
Maddison Mechanical LLC, 4161 Mulligan St, Longmont, CO (Owned by: Maddison Mechanical Llc) holds a Plumbing license and 18 other licenses according to the Centennial license board.
Their BuildZoom score of 109 ranks in the top 5% of 55,949 Colorado licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Maddison Mechanical LLC, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Maddison Mechanical LLC Contact Information
Phone Number: (303) 862-5319
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Address: 4161 MULLIGAN ST, Longmont, CO 80504
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Maddison Mechanical LLC Longmont
Quality
109
95th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Maddison Mechanical LLC has a BuildZoom score of 109, which places them above 95% of 55,949 contractors in Colorado.
Activity
|
18 projects
|
2025 |
|
20 projects
|
2024 |
|
15 projects
|
2023 |
Our building permit records indicate that Maddison Mechanical LLC has worked on at least
53.0 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
|
10 projects
|
Commercial Renovations |
|
6 projects
|
Home Additions |
|
5 projects
|
New Constructions |
|
6 projects
|
HVAC projects |
Analyzing permits over the last 4 years shows that Maddison Mechanical LLC mostly works on
commercial renovation
and hvac project
projects.
Pricing
|
7 projects
|
< $5k |
|
3 projects
|
$5k-$20k |
|
2 projects
|
$20k-$50k |
|
10 projects
|
$50k-$100k |
|
6 projects
|
$100k-$250k |
|
1 project
|
$250k-$500k |
|
3 projects
|
$500k-$1mil |
|
2 projects
|
$1mil+ |
The typical size of their permits is approximately $42,000. 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.
Building Permits by Maddison Mechanical LLC
This is a sample of this contractor's permits. Click here to access their complete permit history.
The proposed project consists of tenant improvements to a 2 515 square foot single story existing building. the building currently has two tenants operating as a jewelry store and a barber shop. the proposed plans show the entire building now operating as a jewelry store. the existing entry on the north elevation will be made handicap accessible. otherwise there are no other proposed ... see more
Valuation:
$230,050
Permit #:
22-001236
Status:
issued
Fee:
$10,258
Permit Type:
N/A
Building Type:
N/A
Fire damage repair outlined in engineers report. rim joist replacement sill plate replacement electrical circuit replace replace line set to air conditioning unit. replace patio and front door
Valuation:
$41,681
Permit #:
B202501098
Status:
complete
Fee:
$1,953
Permit Type:
N/A
Building Type:
N/A
Tenant improvement level 1 and level 2 alterations to an existing 6 story multi-tenant residential building culmilating in less than 50 percent of the gross area. no alterations are being made to the existing building roof or envelope. condensing units will be added to balconies of each unit
Valuation:
$244,816
Permit #:
2022-MECH-0004517
Status:
final
Fee:
$1,582
Permit Type:
N/A
Building Type:
Multi-family resi...
Traffic system management building is new node building for e470 flyway. it will have electrical work hvac to keep the building heated and cooled natural gas generator and its equipment
Valuation:
$700,000
Permit #:
BDP23-0560
Status:
issued
Fee:
$12,922
Permit Type:
New
Building Type:
Industrial
The proposed project consists of interior demolition of a 2 515 square foot single story existing building. the existing entry on the north elevation will be demolished in preparation for a handicap entrance. this demolition has been approved by historic preservation otherwise there are no other proposed exterior demolition items
Valuation:
N/A
Permit #:
23-000055
Status:
issued
Fee:
$333
Permit Type:
N/A
Building Type:
N/A
8264 sf structural steel commercial building on slab - includes utilities - includes two offices four classrooms one break room one ammunition room one gun cleaning room one storage room and seven 3/4 bathrooms - for training facility and shooting range - weld county sheriffs office - fees deffered
Valuation:
$1,324,389
Permit #:
CMN21-0088
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
3625 e 48th ave - landlord improvements to existing building to make facade utility structural and accessibility upgrades to the building in order to entice a future tenant to adaptively reuse the building
Valuation:
N/A
Permit #:
2024-SUDP-0001931
Status:
issued
Fee:
$54,395
Permit Type:
Addition & altera...
Building Type:
N/A
This 250 sf tenant improvement project for a pre-k school includes the moving of one wall removal of existing kitchen equipment and installation of new equipment on the first level. there will be a new restroom on the second level. there will be new routing of mechanical electrical and plumbing at these areas. there will be no exterior alterations change in square footage or change of... see more
Valuation:
$42,000
Permit #:
2023-PLUMB-0008260
Status:
final
Fee:
$356
Permit Type:
N/A
Building Type:
N/A
Replace existing boilers in building 8 with 2 new
Valuation:
$130,000
Permit #:
PLBG25-00004
Status:
final
Fee:
$3,093
Permit Type:
Residential
Building Type:
N/A
Move kitchen remodel men's bathroom addition heating unit
Valuation:
N/A
Permit #:
NRE211032
Status:
expired
Fee:
N/A
Permit Type:
Tenant improvement
Building Type:
N/A
Tenant improvement from a gray shell space designed in 2017 for an a2 occupancy. we are creating an eating establishment by adding commercial kitchen men's and women's restrooms bar general dining and patio space with loose tables and chairs
Valuation:
N/A
Permit #:
2022-SUDP-0004844
Status:
approved
Fee:
$100
Permit Type:
Alteration
Building Type:
N/A
8216 e northfield #1320 - chg of occupancy-m vince nail spa - tenant finish login 8216 northfield blvd. suite 1320 remodel of existing retail space to include demolish and construction with associated mep. with minor exterior work
Valuation:
$120,000
Permit #:
2021-PLUMB-0012425
Status:
final
Fee:
$882
Permit Type:
N/A
Building Type:
Commercial
8216 e northfield #1320 - chg of occupancy-m vince nail spa - tenant finish login 8216 northfield blvd. suite 1320 remodel of existing retail space to include demolish and construction with associated mep. with minor exterior work
Valuation:
$100,000
Permit #:
2021-MECH-0010142
Status:
final
Fee:
$770
Permit Type:
N/A
Building Type:
Commercial
Interior renovations
Valuation:
$3,014,776
Permit #:
COMM23-00029
Status:
final
Fee:
$85,038
Permit Type:
Tenant finish
Building Type:
N/A
Replacing existing chiller/cooling tower coil on roof top with 1 new 60 ton air cooled chiller and related piping. this is a multi-family property
Valuation:
$130,000
Permit #:
2023-BOILERAC-0000493
Status:
final
Fee:
$938
Permit Type:
N/A
Building Type:
N/A
Moving gas line from exterior to underground. installing owner supplied rr fixtures for bathroom remodel and addition and related dwv and water for addition
Valuation:
$15,000
Permit #:
2024-PLUMB-0000123
Status:
final
Fee:
$139
Permit Type:
N/A
Building Type:
Single family res...
Promenade m vince nail spa commercial li no facade changes
Valuation:
$800,000
Permit #:
21-3498
Status:
final
Fee:
$28,239
Permit Type:
Landlord improvement
Building Type:
N/A
This project consists of a standard office build-out. scope of work includes private offices conference rooms storage rooms reception area and break room. finish level for this project is considered as mid-level with standard office finish specifications throughout
Valuation:
$7,516
Permit #:
2021-PLUMB-0011980
Status:
final
Fee:
$183
Permit Type:
N/A
Building Type:
N/A
Tenant finish of 4090 sq. ft. in existing core and shell space for fidelity investments. work to include electrical plumbing and mechanical. job contact: joel bowers 303-748-8811
Valuation:
$759,457
Permit #:
B2011441
Status:
complete
Fee:
$24,306
Permit Type:
N/A
Building Type:
N/A
Tenant buildout. nail salon non-strcutural
Valuation:
$850,000
Permit #:
CEN-22-00263
Status:
complete
Fee:
$20,366
Permit Type:
N/A
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Maddison Mechanical LLC License info
Verified License
| License # | CL-36567 |
| Status | Active |
| City | Centennial |
| Type | Plumbing |
| Class | Plumbing |
| Date Issued | 06-02-2026 |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Maddison Mechanical LLC 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 | Steam & Hot Water |
- BuildZoom verified this license was active as of July 2026.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 22-099038 |
| Status | Active |
| City | Lafayette |
| Type | Plumbing Contractor |
- When BuildZoom last verified this license, it had an expiration date of May, 2026. Check the current license status of Maddison Mechanical LLC with the City of Lafayette
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 July 2026.
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 July 2026.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 1701016 |
| Status | Active |
| City | Westminster |
| Type | Plumbing Contractor |
- When BuildZoom last verified this license, it had an expiration date of June, 2026. Check the current license status of Maddison Mechanical LLC with the City of Westminster, Colorado
This is a sample of licensing data; click here to access a complete history.
Verified License
| Status | Active |
| City | Aurora |
| Type | Plumbing |
- BuildZoom verified this license was active as of July 2026.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | LIC-0011567-PLBG |
| Status | Active |
| City | Boulder |
| Type | Plumbing |
| Class | Plumbing |
| Date Issued | 06-27-2026 |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Maddison Mechanical LLC at the Boulder Licensing Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | AEC7318 |
| Status | Active |
| City | Arvada |
| Type | Contractor |
| Date Issued | 04-08-2026 |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Maddison Mechanical LLC at the The City of Arvada, Colorado.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | LCC201700467 |
| Status | Active |
| City | Thornton |
| Type | Class D Plumbing/Mechanical Expires 2026 11 18 |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Maddison Mechanical LLC 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 |
| 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 Maddison Mechanical LLC with the Jefferson County Licensed Contractors
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | MA210022 |
| Status | Active |
| County | Douglas County |
| Type | Mechanical A |
- When BuildZoom last verified this license, it had an expiration date of January, 2026. Check the current license status of Maddison Mechanical LLC with the Douglas County Building Division
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| Status | Active |
| City | Denver |
- When BuildZoom last verified this license, it had an expiration date of March, 2021. Check the current license status of Maddison Mechanical LLC 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.
Inactive License
| License # | 20-3778 |
| Status | Inactive |
| Town | Castle Rock |
| Type | Mechanical |
- According to the Castle Rock Town, 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.
Check this license's status for Maddison Mechanical LLC at the Castle Rock Town, Colorado.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 16-2151 |
| Status | Inactive |
| Town | Castle Rock |
| Type | Plumbing |
- According to the Castle Rock Town, 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.
Check this license's status for Maddison Mechanical LLC at the Castle Rock Town, Colorado.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | D11606 |
| Status | Inactive |
| City | Littleton |
| Type | Contractor |
- 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 Maddison Mechanical LLC at the The City of Littleton, CO.
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
| License # | P00467 |
| Status | Inactive |
| City | Littleton |
| Type | Class P |
- 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 Maddison Mechanical LLC at the The City of Littleton, CO.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | P160324 |
| Status | Inactive |
| County | Douglas County |
| Type | Plumbing |
- According to the Douglas County Building Division, 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 Maddison Mechanical LLC at the Douglas County Building Division.
This is a sample of licensing data; click here to access a complete history.
109
BuildZoom Score
Insured
| Insurer | Emplyers Mutual Casualty Co |
Insured
| Workers Comp Provider | Pinnacol Assurance |
151
Permits
- Building permit records show that Maddison Mechanical LLC has worked on 151 permitted projects.
Maddison Mechanical LLC Employees
GT
Gwynn Teets
Contact
LC
Lindsay Cannon
Owner
MM
Maddison Mechanical
Owner
ML
Maddison Mechanical Llc
Owner
MB
Marion Browning
MC
Matt Cannon
Owner
MC
Matthew Cannon
SP
Steve Paxton
Co Owner