Updated: Mar 27, 2026
Location and Projects
Address
910 N 9TH AVE, Upland, CA, 91786
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Mark Chilson HVAC/Mechanical Contractor
Mark Chilson, 910 N 9th Ave, Upland, CA (Employee: Mark Andrew Chilson) holds a Warm Air Heating, Ventilating And Air Conditioning license according to the California license board.
Their BuildZoom score of 93 ranks in the top 27% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Mark Chilson, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Mark Chilson Contact Information
Phone Number: (909) 800-2055
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Address: 910 N 9TH AVE, Upland, CA 91786
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Mark Chilson Upland
Quality
93
73rd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Mark Chilson has a BuildZoom score of 93, which places them above 73% of 336,931 contractors in California.
Activity
|
1 project
|
2025 |
|
1 project
|
2024 |
Our building permit records indicate that Mark Chilson has worked on at least
2.0 projects over the past 2 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
|
1 project
|
$5k-$20k |
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.
Anthropology- c/o like for like
Valuation:
$16,300
Permit #:
HVCC25-0003
Status:
final
Fee:
$345
Permit Type:
Tier 1-less 15 seer
Building Type:
N/A
Hvac units replacement like for like
Valuation:
N/A
Permit #:
PMT2024-00809
Status:
final
Fee:
$470
Permit Type:
N/A
Building Type:
N/A
Anthropology- c/o like for like unit #4
Valuation:
$14,200
Permit #:
HVCC25-0009
Status:
final
Fee:
$345
Permit Type:
Tier 1-less 15 seer
Building Type:
N/A
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Mark Chilson Reviews
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Verified License
BuildZoom confirmed this contractor's license
Mark Chilson License info
Verified License
| License # | 1051903 |
| Status | Active |
| State | California |
| Type | Warm Air Heating, Ventilating And Air Conditioning |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Mark Chilson at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
93
BuildZoom Score
Bonded
| Bonded Agent | Wesco Insurance Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Clear Spring Property & Casualty Company |
Mark Chilson Employees
MC
Mark Andrew Chilson
Sole Owner