Updated: May 10, 2026
Location and Projects
Address
208 North Spring Valley Rd, Wilmington, DE, 19807
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Robert T. Mullin, Jr HVAC/Mechanical Contractor
Robert T. Mullin, Jr, 208 N Spring Valley Rd, Wilmington, DE holds a Resident Contractor license and 1 other license according to the New Castle County license board.
Their BuildZoom score of 96 ranks in the top 20% of 8,071 Delaware licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Robert T. Mullin, Jr, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Robert T. Mullin, Jr Contact Information
Address: 208 North Spring Valley Rd, Wilmington, DE 19807
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Install 5 new gas-fired packaged rooftop units including gas line and ductwork. remote terminal unit 1 thru 4 are 10 ton units rtu-5 is a 15 ton unit. total of 55 tons for this project
Valuation:
N/A
Permit #:
202311761
Status:
final
Fee:
$6,468
Permit Type:
N/A
Building Type:
Exempt commercial
Install new tankless hot water heater and new 2 indoor/1 outdoor minisplit heat pump system. install larger gas line to new tankless hot water heater
Valuation:
N/A
Permit #:
202308721
Status:
final
Fee:
$65
Permit Type:
N/A
Building Type:
Residential
Replace existing water source heat pumps ductwork and install new vrf system
Valuation:
N/A
Permit #:
202510448
Status:
issued
Fee:
$982
Permit Type:
N/A
Building Type:
Commercial
Replace existing mini-split units with new mini-splits and install new energy recovery units
Valuation:
N/A
Permit #:
202215220
Status:
final
Fee:
$2,796
Permit Type:
N/A
Building Type:
Exempt commercial
Replace existing oil fired boiler with natural gas fired boiler. install new gas line and new natural gas fired water heater
Valuation:
N/A
Permit #:
202113097
Status:
final
Fee:
$65
Permit Type:
N/A
Building Type:
Residential
Extend existing ductwork into new addition with 2 supply leads and 1 return lead
Valuation:
N/A
Permit #:
202114834
Status:
final
Fee:
$65
Permit Type:
N/A
Building Type:
Residential
Install exhaust fan ductwork fresh air louver
Valuation:
N/A
Permit #:
202208142
Status:
final
Fee:
$79
Permit Type:
N/A
Building Type:
Commercial
Reconnect air conditioning supply register damaged by tree
Valuation:
N/A
Permit #:
202014391
Status:
final
Fee:
$65
Permit Type:
N/A
Building Type:
Residential
Install new supply and return duct leads in finished basement
Valuation:
N/A
Permit #:
202309949
Status:
final
Fee:
$65
Permit Type:
N/A
Building Type:
Residential
Relocate/replace existing ductwork systems
Valuation:
N/A
Permit #:
202415407
Status:
final
Fee:
$84
Permit Type:
N/A
Building Type:
Residential
Install 11 rooftop packaged gas/electric units gas line ductwork registers & grills
Valuation:
N/A
Permit #:
201916326
Status:
final
Fee:
$1,596
Permit Type:
N/A
Building Type:
Exempt residential
Extend gas line to new gas cooktop
Valuation:
N/A
Permit #:
202401480
Status:
final
Fee:
$65
Permit Type:
N/A
Building Type:
Residential
Replace oil furnace with gas furnace replace air conditioning system
Valuation:
N/A
Permit #:
201915983
Status:
final
Fee:
$65
Permit Type:
N/A
Building Type:
Residential
Replace existing air handler and condenser
Valuation:
N/A
Permit #:
202103166
Status:
final
Fee:
$1,302
Permit Type:
N/A
Building Type:
Exempt commercial
Replace (2) existing air handlers addition (3) new air handlers. replace ductwork registers grilles and hot water supply and return piping
Valuation:
N/A
Permit #:
201814632
Status:
final
Fee:
$2,300
Permit Type:
N/A
Building Type:
Exempt commercial
Replace oil furnace with new direct vent natural gas furnace and install new gas line
Valuation:
N/A
Permit #:
201815931
Status:
final
Fee:
$145
Permit Type:
N/A
Building Type:
Residential
Install minisplit heat pump
Valuation:
N/A
Permit #:
202106135
Status:
final
Fee:
$65
Permit Type:
N/A
Building Type:
Exempt commercial
Install four (4) 6 heat leads and two (2) cold air returns in new addition
Valuation:
N/A
Permit #:
201901422
Status:
final
Fee:
$130
Permit Type:
N/A
Building Type:
Residential
Install four (4) 6 heat leads and two (2) cold air returns in new addition
Valuation:
N/A
Permit #:
201901422
Status:
final
Fee:
$130
Permit Type:
N/A
Building Type:
Residential
Replace four (4) existing gas/electric roof-top hvac units
Valuation:
N/A
Permit #:
201909242
Status:
final
Fee:
$137
Permit Type:
N/A
Building Type:
Industrial
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Verified License
BuildZoom confirmed this contractor's license
Robert T. Mullin, Jr License info
License Not Verified
| License # | 1993108807 |
| Status | Active |
| State | New Castle County |
| Type | Resident Contractor |
| Business Type | Individual |
- When BuildZoom last verified this license, it had an expiration date of December, 2025. Check the current license status of Robert T. Mullin, Jr with the State of Delaware Department of Finance: Division of Revenue
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | HM-0000539 |
| Status | Active |
| State | Delaware |
| Type | Hvacr |
| Business Type | Individual |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Robert T. Mullin, Jr at the State of Delaware.
This is a sample of licensing data; click here to access a complete history.
96
BuildZoom Score
166
Permits
- Building permit records show that Robert T. Mullin, Jr has worked on 166 permitted projects.
Robert T. Mullin, Jr Employees
RM
Robert T. Mullin
Applicant