Updated: Jul 29, 2026
Location and Projects
Address
2863 S Pagosa St, Aurora, CO, 80013
Use our bidding system to
request a quote
Square A Mechanical Systems
We specialize in hot water, steam and radiant heating. Owner Kevin Williams has over 30 years experience in commercial & residential HVAC. Our goal is to provide excellent customer service while doing the job right without cutting corners!
From BuildZoom: Square A Mechanical Systems, 2863 S Pagosa St, Aurora, CO (Owned by: Williams Kevin D) holds a Refrigeration A license and 6 other licenses according to the Denver 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 Square A Mechanical Systems, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Square A Mechanical Systems Contact Information
Phone Number: (303) 918-9171
Address: 2863 S Pagosa St, Aurora, CO 80013
Square A Mechanical Systems Aurora
Quality
106
93rd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Square A Mechanical Systems has a BuildZoom score of 106, which places them above 93% of 55,949 contractors in Colorado.
Activity
|
3 projects
|
2025 |
|
7 projects
|
2024 |
|
6 projects
|
2023 |
Our building permit records indicate that Square A Mechanical Systems 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.
Experience
|
5 projects
|
Home Additions |
|
13 projects
|
HVAC projects |
|
9 projects
|
Mechanical projects |
Analyzing permits over the last 4 years shows that Square A Mechanical Systems mostly works on
hvac project
and mechanical project
projects.
Pricing
|
5 projects
|
< $5k |
|
10 projects
|
$5k-$20k |
|
1 project
|
$20k-$50k |
The typical size of their permits is approximately $8,850. 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 Square A Mechanical Systems
This is a sample of this contractor's permits. Click here to access their complete permit history.
Consolidate (2) gas meters into (1) new meter provided xcel. house had an apartment at one time. it was converted back to single family residence
Valuation:
$500
Permit #:
2025-LOG-0006919
Status:
approved
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
New hvac installation for the accessory dwelling unit renovation on the back of the property
Valuation:
$9,500
Permit #:
2025-MECH-0001619
Status:
issued
Fee:
$99
Permit Type:
N/A
Building Type:
Single family res...
Replace old tankless water heater with new tankless water heater
Valuation:
$4,300
Permit #:
2025-BOILERAC-0000044
Status:
issued
Fee:
$59
Permit Type:
N/A
Building Type:
Single family res...
Install ductless split with matching air handler. relocate existing condensing unit. rough ductwork for range hood. install 2 exhaust fans
Valuation:
$13,000
Permit #:
2024-MECH-0000471
Status:
final
Fee:
$123
Permit Type:
N/A
Building Type:
Single family res...
Consolidate (2) gas meters into 1 properly sized gas meter. we need a meter release and pressure test
Valuation:
$500
Permit #:
2025-MECH-0004973
Status:
issued
Fee:
$20
Permit Type:
N/A
Building Type:
Single family res...
Replace existing boiler addition 1 indirect water heater. install flue liner. connect to existing piping and electrical
Valuation:
$23,850
Permit #:
2024-BOILERAC-0000230
Status:
final
Fee:
$211
Permit Type:
N/A
Building Type:
Duplex
New heating/cooling system: addition of one condenser and two head units for a new adu on the rear of the property
Valuation:
$10,500
Permit #:
2024-MECH-0003214
Status:
final
Fee:
$107
Permit Type:
N/A
Building Type:
Single family res...
Replace existing boiler. connect to existing gas water and electrical. addition chimney liner
Valuation:
$9,300
Permit #:
2023-BOILERAC-0000225
Status:
final
Fee:
$99
Permit Type:
N/A
Building Type:
Single family res...
Install four toe kick heaters in kitchen. connect to existing hot water piping in the basement
Valuation:
$3,000
Permit #:
2023-BOILERAC-0000374
Status:
final
Fee:
$43
Permit Type:
N/A
Building Type:
Single family res...
Replace existing furnace & air conditioning. connect to existing ductwork electrical gas and venting
Valuation:
$8,000
Permit #:
2024-MECH-0002347
Status:
issued
Fee:
$83
Permit Type:
N/A
Building Type:
Single family res...
Install new boiler and near boiler piping. homeowner is installing the radiant tubing and has a separate permit for that work
Valuation:
$14,000
Permit #:
2023-BOILERAC-0000448
Status:
final
Fee:
$131
Permit Type:
N/A
Building Type:
Single family res...
Replace existing boiler with 140mbh boiler. connect to exiting steam water gas condensate and electrical
Valuation:
$13,500
Permit #:
2022-BOILERAC-0000637
Status:
final
Fee:
$131
Permit Type:
N/A
Building Type:
Single family res...
Replace steam boiler. connect to existing steam condensate and gas piping. connect venting tenant improvement existing tile lined masonry chimney
Valuation:
$12,000
Permit #:
2021-BOILERAC-0000664
Status:
final
Fee:
$115
Permit Type:
N/A
Building Type:
Single family res...
Replace existing boiler with (2) smaller boilers. connect to existing water gas and electrical
Valuation:
$23,000
Permit #:
2022-BOILERAC-0000688
Status:
final
Fee:
$203
Permit Type:
N/A
Building Type:
Single family res...
Move boiler venting to new location to accommodate new wall framing
Valuation:
$1,200
Permit #:
2023-MECH-0004313
Status:
final
Fee:
$35
Permit Type:
N/A
Building Type:
Single family res...
Install multi-zone heat pump 2 ervs 2 bathroom fans kitchen exhaust dryer vent
Valuation:
$8,400
Permit #:
2024-MECH-0006678
Status:
issued
Fee:
$91
Permit Type:
N/A
Building Type:
Single family res...
Installation of a mini-split unit into the shed being constructed on the front of the property
Valuation:
$1,800
Permit #:
2023-MECH-0009307
Status:
final
Fee:
$35
Permit Type:
N/A
Building Type:
Garage
Replace existing boiler. run new hw piping to existing cast iron radiators. install new tank type electric water heater
Valuation:
$13,500
Permit #:
2020-BOILERAC-0000043
Status:
final
Fee:
$131
Permit Type:
N/A
Building Type:
Single family res...
Replace furnace. install chimney liner. addition 1 combustion air head
Valuation:
$4,200
Permit #:
2021-MECH-0007532
Status:
final
Fee:
$59
Permit Type:
N/A
Building Type:
Single family res...
Furnace/ac/water heater combo
Valuation:
$15,650
Permit #:
21-13497
Status:
issued
Fee:
$265
Permit Type:
Furnace/AC/water ...
Building Type:
N/A
Square A Mechanical Systems Reviews
BuildZoom hasn't received any reviews for Square A Mechanical Systems. Click here to be alerted when reviews are posted about them.
Recent Buildzoom Projects
Hiring a contractor?
Verified License
BuildZoom confirmed this contractor's license
Square A Mechanical Systems License info
Verified License
| Status | Active |
| City | Denver |
| Type | Refrigeration A |
| Business Type | Sole Proprietorship |
- 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 | H & V A |
| Business Type | Sole Proprietorship |
- 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 | Steam & Hot Water |
| Business Type | Sole Proprietorship |
- 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 # | MA03061 |
| Status | Active |
| County | Douglas County |
| Type | Mechanical A |
| Business Type | Sole Proprietorship |
- BuildZoom verified this license was active as of September 2025.
Verify this license's status for Square A Mechanical Systems at the Douglas County Building Division.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | LIC236628 |
| Status | Active |
| City | Denver |
| Type | Steam & Hot Water |
| Class | Contractor |
| Business Type | Sole Proprietorship |
- When BuildZoom last verified this license, it had an expiration date of December, 2023. Check the current license status of Square A Mechanical Systems 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
| Status | Inactive |
| City | Denver |
| Business Type | Sole Proprietorship |
- 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
| License # | D11002 |
| Status | Inactive |
| City | Littleton |
| Type | Class D |
| Business Type | Sole Proprietorship |
- 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 Square A Mechanical Systems at the The City of Littleton, CO.
This is a sample of licensing data; click here to access a complete history.
106
BuildZoom Score
71
Permits
- Building permit records show that Square A Mechanical Systems has worked on 71 permitted projects.
Square A Mechanical Systems Employees
KW
Kevin D Williams
Owner
WD
Williams Kevin D
Owner