Updated: Jun 02, 2026
Location and Projects
Address
733 S Bowen St, Longmont, CO, 80501
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Carroll Mechanical Services
Carroll Mechanical Services of Longmont offers residential and commercial HVAC installation and services. We pride ourselves on top quality service at a reasonable price. We have over 15 years of experience in HVAC installation and repair in the Longmont area.
We install and service all heating and air conditioning brands and guarantee our customer’s satisfaction. Our technicians are professionally trained, licensed, reliable, and courteous. All your questions are our priority, as we are ready to serve all your heating and air conditioning needs! We have a 5 Star Service Magic(R) Rating.
From BuildZoom: Carroll Mechanical Services, 733 S Bowen St, Longmont, CO (Owned by: Brien Carroll) holds a Mechanical Contractor license and 12 other licenses according to the Lafayette license board.
Their BuildZoom score of 116 ranks in the top 2% of 55,949 Colorado licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Carroll Mechanical Services, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Carroll Mechanical Services Services
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Carroll Mechanical Services Contact Information
Phone Number: (720) 891-3518
Address: 733 S Bowen St, Longmont, CO 80501
Carroll Mechanical Services Longmont
Quality
116
98th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Carroll Mechanical Services has a BuildZoom score of 116, which places them above 98% of 55,949 contractors in Colorado.
Activity
|
75 projects
|
2025 |
|
80 projects
|
2024 |
|
103 projects
|
2023 |
Our building permit records indicate that Carroll Mechanical Services 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
|
199 projects
|
HVAC projects |
|
13 projects
|
Mechanical projects |
Analyzing permits over the last 4 years shows that Carroll Mechanical Services mostly works on
hvac project
and mechanical project
projects.
Pricing
|
41 projects
|
< $5k |
|
141 projects
|
$5k-$20k |
|
15 projects
|
$20k-$50k |
The typical size of their permits is approximately $9,163. 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 Carroll Mechanical Services
This is a sample of this contractor's permits. Click here to access their complete permit history.
Replace furnace air conditioning heat pump coil and control
Valuation:
$14,138
Permit #:
B202502571
Status:
approved
Fee:
$383
Permit Type:
N/A
Building Type:
N/A
Replace hvac with 98% 80.000 btu furnace and cold climate heat pump
Valuation:
N/A
Permit #:
MEC2025-00258
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install single head mini split single stage 18 000 btu
Valuation:
$9,151
Permit #:
B202502049
Status:
expired
Fee:
$266
Permit Type:
N/A
Building Type:
N/A
Replace furnace 98% 80, 000 btu's (original permit mistakenly addressed for 3131 10th street and that permit has been closed out)
Valuation:
N/A
Permit #:
MEC2023-00546
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace furnace and air conditioning
Valuation:
$27,003
Permit #:
B202501205
Status:
expired
Fee:
$687
Permit Type:
N/A
Building Type:
N/A
Replace furnace and air conditioning
Valuation:
$15,060
Permit #:
B202502676
Status:
expired
Fee:
$405
Permit Type:
N/A
Building Type:
N/A
Replace furnace and air conditioning
Valuation:
$15,571
Permit #:
B202502620
Status:
complete
Fee:
$417
Permit Type:
N/A
Building Type:
N/A
Install mini split single head-12.000 btu head
Valuation:
N/A
Permit #:
MEC2025-00768
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace furnace & 4-ton heat pump
Valuation:
$15,503
Permit #:
BP-25-0269
Status:
issued
Fee:
$404
Permit Type:
N/A
Building Type:
N/A
Repalce ac's and furnace's furnace 1- 100.00 btu 96% two stage air conditioning 1- 19 seer 5 stage 3 ton furnace 2- 60.000 btu 97.7% two stage air conditioning 2- 19 seer 5 stage 2 ton
Valuation:
$33,000
Permit #:
B202102186
Status:
complete
Fee:
$100
Permit Type:
N/A
Building Type:
N/A
Install 3 ton 16 seer air conditioning replacement in existing dwelling built in 2006 - electric included - 1/4/21 permit expiration warning letter mailed to owner and emailed to applicant (trj)
Valuation:
$6,426
Permit #:
RSA20-0338
Status:
final
Fee:
$162
Permit Type:
N/A
Building Type:
N/A
Replace furnace and air conditioning
Valuation:
$13,169
Permit #:
B202503144
Status:
approved
Fee:
$360
Permit Type:
N/A
Building Type:
N/A
Replace furnace and air conditioning
Valuation:
$10,185
Permit #:
B202502570
Status:
expired
Fee:
$290
Permit Type:
N/A
Building Type:
N/A
Install 2 18 000 btu head mini split
Valuation:
$13,469
Permit #:
B202502183
Status:
expired
Fee:
$368
Permit Type:
N/A
Building Type:
N/A
Replace 10-ton remote terminal unit the weight of the unit is 1, 041 lbs that was an exact replacement so they both weigh the same
Valuation:
$29,000
Permit #:
23NGN-01119
Status:
complete
Fee:
$1,012
Permit Type:
N/A
Building Type:
N/A
Replace furnace and heat pump
Valuation:
$10,991
Permit #:
B202502389
Status:
complete
Fee:
$309
Permit Type:
N/A
Building Type:
N/A
Replace furnace and air conditioning
Valuation:
$2,430
Permit #:
B202500781
Status:
complete
Fee:
$107
Permit Type:
N/A
Building Type:
N/A
Replace furnace and 40 gallon water heater at: 225 e. 8th ave unit f14 longmont 80501
Valuation:
$6,532
Permit #:
B202301464
Status:
expired
Fee:
$80
Permit Type:
N/A
Building Type:
N/A
Replace air conditioning
Valuation:
$5,200
Permit #:
B202502830
Status:
issued
Fee:
$163
Permit Type:
N/A
Building Type:
N/A
Install mini split system
Valuation:
$5,241
Permit #:
BP-25-0892
Status:
triage
Fee:
$190
Permit Type:
N/A
Building Type:
N/A
Carroll Mechanical Services Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Carroll Mechanical Services License info
Verified License
| License # | 22-024861 |
| Status | Active |
| City | Lafayette |
| Type | Mechanical Contractor |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Carroll Mechanical Services at the City of Lafayette.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | CON-19-0114 |
| Status | Active |
| County | Boulder County |
| Type | Commercial Mechanical Installations And Repair |
- When BuildZoom last verified this license, it had an expiration date of November, 2025. Check the current license status of Carroll Mechanical Services with the Boulder County Land Use Department
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | CL0443 |
| Status | Active |
| County | Larimer County, Co |
| Type | Commercial |
- When BuildZoom last verified this license, it had an expiration date of May, 2019. Check the current license status of Carroll Mechanical Services with the Larimer County
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | MEC5024861 |
| Status | Active |
| City | Lafayette |
| Type | Mechanical Contractor |
- When BuildZoom last verified this license, it had an expiration date of January, 2023. Check the current license status of Carroll Mechanical Services with the City of Lafayette
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | LIC-0008945 |
| Status | Active |
| City | Boulder |
| Type | Mechanical |
| Class | Class B Commercial & Residential |
- When BuildZoom last verified this license, it had an expiration date of December, 2018. Check the current license status of Carroll Mechanical Services with the Boulder Licensing Board
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 1982 |
| Status | Active |
| City | Arvada |
| Type | Bid Contractor, Mechanical |
- When BuildZoom last verified this license, it had an expiration date of March, 2016. Check the current license status of Carroll Mechanical Services 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 # | 0008945 |
| Status | Active |
| City | Boulder |
| Type | Mechanical Class B Commercial & Residential |
- When BuildZoom last verified this license, it had an expiration date of March, 2016. Check the current license status of Carroll Mechanical Services with the Boulder Licensing Board
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 4827 |
| Status | Inactive |
| State | Colorado |
| Type | Plumbing Contractor |
- According to the Colorado Division of Professions and Occupations, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Carroll Mechanical Services at the Colorado Division of Professions and Occupations.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | LCC202200473 |
| Status | Inactive |
| City | Thornton |
| Type | Class D Plumbing |
- 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 Carroll Mechanical Services at the Thornton City Development Contractor License.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | LIC-0008945-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.
Check this license's status for Carroll Mechanical Services at the Boulder Licensing Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 101031017 |
| Status | Inactive |
| City | Westminster |
| Type | General Contractor |
- According to the City of Westminster, Colorado, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Carroll Mechanical Services at the City of Westminster, Colorado.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CON-10-0065 |
| Status | Inactive |
| County | Boulder County |
| Type | Residential Mechanical Installations And Repair |
- According to the Boulder County Land Use Department, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Carroll Mechanical Services at the Boulder County Land Use Department.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | AEC1982 |
| Status | Inactive |
| City | Arvada |
| Type | Contractor |
- 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 Carroll Mechanical Services at the The City of Arvada, Colorado.
This is a sample of licensing data; click here to access a complete history.
116
BuildZoom Score
1.1K
Permits
- Building permit records show that Carroll Mechanical Services has worked on 1105 permitted projects.
Carroll Mechanical Services Employees
BC
Brien Carroll
Owner