Updated: May 30, 2026
Location and Projects
Address
Crownsville, MD, 21032
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Timothy Lee Mattoon HVAC/Mechanical Contractor
Timothy Lee Mattoon, Crownsville, MD holds a Heating, Ventilation, Air Conditioning And Refrigeration license and 1 other license according to the Maryland license board.
Their BuildZoom score of 92 ranks in the top 32% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Timothy Lee Mattoon, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Timothy Lee Mattoon Contact Information
Phone Number: (410) 972-9343
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This is a sample of this contractor's permits. Click here to access their complete permit history.
New install 1.5 ton heat pump
Valuation:
N/A
Permit #:
MEC22-0340
Status:
final
Fee:
$225
Permit Type:
Existing building...
Building Type:
N/A
Ductwork-replacing quanity of 6 2'x2 diffucers
Valuation:
N/A
Permit #:
MEC19-0149
Status:
final
Fee:
$185
Permit Type:
Existing building...
Building Type:
N/A
Replace existing 2/3 ton heat pump
Valuation:
N/A
Permit #:
MEC20-0560
Status:
final
Fee:
$220
Permit Type:
Existing building...
Building Type:
N/A
Replace existing 3 ton heat pump
Valuation:
N/A
Permit #:
MEC21-0028
Status:
final
Fee:
$150
Permit Type:
Existing building...
Building Type:
N/A
Replace existing 2.5 ton heating pump
Valuation:
N/A
Permit #:
MEC20-0412
Status:
issued
Fee:
$125
Permit Type:
Existing building...
Building Type:
N/A
2 new heat pump systems
Valuation:
N/A
Permit #:
MEC19-0005
Status:
final
Fee:
$182
Permit Type:
Existing building...
Building Type:
N/A
Replae existing 2.5 ton a/c; 80% furnace
Valuation:
N/A
Permit #:
MEC21-0276
Status:
final
Fee:
$225
Permit Type:
Existing building...
Building Type:
N/A
Install hood range
Valuation:
$800
Permit #:
MEC21-0371
Status:
issued
Fee:
$125
Permit Type:
Existing building...
Building Type:
N/A
Alter existing
Valuation:
N/A
Permit #:
MEC21-0146
Status:
issued
Fee:
$125
Permit Type:
Existing building...
Building Type:
N/A
Addition heating and air conditioning replace existing unit and install new 4-ton system with duct to cover existing as well as addition
Valuation:
$0
Permit #:
M02109405
Status:
Expired
Fee:
$95
Permit Type:
Addition
Building Type:
Single family dwe...
Heating and air conditioning first floor will be a three(3)ton heat-pump and th e second floor will have a two (2)ton heat-pump
Valuation:
$0
Permit #:
M02103820
Status:
Completed
Fee:
$95
Permit Type:
New
Building Type:
Single family dwe...
Duct work only install line set and condenser connect to existin g furnace and coil. addition two round lines
Valuation:
$0
Permit #:
M02111202
Status:
Completed
Fee:
$80
Permit Type:
New
Building Type:
Single family dwe...
Addition heating and air conditioning install heat-pump system with duct: 1 (one) zone 4 2, 000btu
Valuation:
$0
Permit #:
M02110831
Status:
Completed
Fee:
$95
Permit Type:
New
Building Type:
Single family dwe...
Heating and air conditioning put in 97, 000 btu's oil fired furnace and 4ton air conditioning and duct
Valuation:
$0
Permit #:
M02107731
Status:
Completed
Fee:
$95
Permit Type:
New
Building Type:
Single family dwe...
Heating and air conditioning install a single zone 18, 000 btu system for additi on
Valuation:
$0
Permit #:
M02106729
Status:
Completed
Fee:
$95
Permit Type:
Addition
Building Type:
Single family dwe...
Heating and air conditioning install ducted system heat pump 1 zone - 30, 000btuh
Valuation:
$0
Permit #:
M02104740
Status:
Completed
Fee:
$95
Permit Type:
New
Building Type:
Single family dwe...
Addition 2-5 round lines in addition and move 2-5 round lines-using ex. equipment
Valuation:
$0
Permit #:
M02099397
Status:
Completed
Fee:
$55
Permit Type:
Addition
Building Type:
Single family dwe...
Finish basement--install 1 diffuser & 1 exhaust vent for added bathroom
Valuation:
$0
Permit #:
M02098093
Status:
Completed
Fee:
$55
Permit Type:
Addition
Building Type:
Single family dwe...
Addition 1 bathroom fan and 2 4x10 colars to supply air thru bulkhead
Valuation:
$0
Permit #:
M02102214
Status:
Completed
Fee:
$80
Permit Type:
Addition
Building Type:
Single family dwe...
New duct outlets return for ex. system basement buildout
Valuation:
$0
Permit #:
M02097873
Status:
Completed
Fee:
$55
Permit Type:
Addition
Building Type:
Single family dwe...
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Verified License
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Timothy Lee Mattoon License info
Verified License
| License # | 2411 |
| Status | Active |
| State | Maryland |
| Type | Heating, Ventilation, Air Conditioning And Refrigeration |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Timothy Lee Mattoon at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CON-3939 |
| Status | Inactive |
| City | Annapolis |
| Type | Mech Cont |
- According to the The City of Annapolis, MD, 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 Timothy Lee Mattoon at the The City of Annapolis, MD.
This is a sample of licensing data; click here to access a complete history.
92
BuildZoom Score
39
Permits
- Building permit records show that Timothy Lee Mattoon has worked on 39 permitted projects.