Updated: Jun 03, 2026
Location and Projects
Address
2652 SIERRA DEL LEON, Corona, CA, 92882
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Prime Mechanical Service Inc
Prime Mechanical Service Inc, 2652 Sierra Del Leon, Corona, CA (Employees: Joel George Sakamoto and John Matthew Eshelman) holds a Warm Air Heating, Ventilating And Air Conditioning, Refrigeration license and 3 other licenses according to the California license board.
Their BuildZoom score of 105 ranks in the top 8% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Prime Mechanical Service Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Prime Mechanical Service Inc Services
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Prime Mechanical Service Inc Contact Information
Phone Number: (408) 782-8058
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Address: 2652 SIERRA DEL LEON, Corona, CA 92882
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Prime Mechanical Service Inc Corona
Quality
105
92nd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Prime Mechanical Service Inc has a BuildZoom score of 105, which places them above 92% of 336,931 contractors in California.
Activity
|
2 projects
|
2025 |
|
4 projects
|
2024 |
Our building permit records indicate that Prime Mechanical Service Inc has worked on at least
6.0 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.
Experience
|
5 projects
|
HVAC projects |
|
4 projects
|
Mechanical projects |
Analyzing permits over the last 4 years shows that Prime Mechanical Service Inc mostly works on
hvac project
and mechanical project
projects.
Pricing
|
1 project
|
$5k-$20k |
|
2 projects
|
$50k-$100k |
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 Prime Mechanical Service Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Demolition of (1) exterior rooftop mounted multi-zone hvac unit; demolition of (7) high-wall fan coil units; demolition of (1) ceiling cassette fan coil unit installation of (4) new r32 refrigerant exterior rooftop mounted hvac compressor units; installation of (7) new r32 refrigerant high wall fan coil units at existing locations; installation of (1) new r32 refrigerant ceiling casse... see more
Valuation:
N/A
Permit #:
PREBLD25-0485
Status:
approved
Fee:
$94
Permit Type:
N/A
Building Type:
N/A
Demolition of(1) exterior rooftop mounted multi-zone hvac unit (7) high wall fan coil units (1) ceiling cassette fan coil unit. install (4) new r32 refigerant exterior rooftop mounted havc compressor units. install (7) r32 refrigerant high wall fan coil units at existing loctions. installation (1) new r32 refigerant ceiling cassette fan coil unit at existing location. all interior uni... see more
Valuation:
$75,000
Permit #:
M25-0008
Status:
plancheck
Fee:
$3,082
Permit Type:
N/A
Building Type:
N/A
Heat pump installation: • adding one new 100-amp sub panel with two 40-amp air conditioning circuits and one 60-amp air conditioning circuit • mount and secure 2 new 5-ton heat pump condensing units on new roof sleepers • install 2 new horizontal heat pump fan coils (provided by the city) • includes all sheet metal duct transitions supply drops and returns • utilize existing roof pene... see more
Valuation:
$80,000
Permit #:
MW24-0064
Status:
final
Fee:
$937
Permit Type:
N/A
Building Type:
N/A
Replace (like for like) domestic hot water heater. the old water heater has reached its end-life and is need of replacement
Valuation:
$18,500
Permit #:
PW25-0117
Status:
issued
Fee:
$482
Permit Type:
N/A
Building Type:
N/A
Mech: install heat pump @ rear w ductowrk **timers prohibited & tamper resistant caps required** (x2021-3439)
Valuation:
N/A
Permit #:
H2022-0459
Status:
final
Fee:
$174
Permit Type:
N/A
Building Type:
N/A
Change out fau in attic and install air conditioning in rear yard
Valuation:
N/A
Permit #:
MEC23-01107
Status:
complete
Fee:
$170
Permit Type:
N/A
Building Type:
N/A
Change out fau in attic and install air conditioning in rear yard
Valuation:
N/A
Permit #:
ELE23-02547
Status:
final
Fee:
$90
Permit Type:
N/A
Building Type:
N/A
Duct modification related to tenant improvement under permit 19-120773 extended and capping duct to this space-
Valuation:
N/A
Permit #:
2019 132860 CI
Status:
final
Fee:
N/A
Permit Type:
Retail
Building Type:
N/A
Connect existing electrical to condenser unit
Valuation:
N/A
Permit #:
21141-90000-19915
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Electrical hook up existing electrical onsite
Valuation:
N/A
Permit #:
21141-90000-19902
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Replacement of condenser unit only
Valuation:
N/A
Permit #:
21044-10000-23633
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Residential hvac - heating ventilation air conditioning
2020-02-11
Replace furnace 81 afue air conditioning 14 seer
Valuation:
$12,147
Permit #:
M20-024222
Status:
final
Fee:
$566
Permit Type:
N/A
Building Type:
N/A
Install mini-split air conditioning unit for server room and on roof
Valuation:
$5,785
Permit #:
19000-03011
Status:
final
Fee:
$791
Permit Type:
N/A
Building Type:
N/A
Replace hvac package unit
Valuation:
$19,194
Permit #:
F200427
Status:
issued
Fee:
$271
Permit Type:
Add/alt commercial
Building Type:
N/A
1st floor 100 sq ft tenant improvement in telephone and idf room
Valuation:
N/A
Permit #:
2018 114032 CI
Status:
applied
Fee:
N/A
Permit Type:
Office
Building Type:
N/A
Hvac change-out/replacing16 existing units with units of same weight or lighter at the same exact location. provide new equipment screen
Valuation:
$140,000
Permit #:
1306200093
Status:
N/A
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Hvac change-out/replacing16 existing units with units of same weight or lighter at the same exact location. provide new equipment screen
Valuation:
$140,000
Permit #:
1306200093
Status:
N/A
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace (e) air conditioning condensing unit and fan coil like for like in same location (condensing unit on rooftop and fan coil in attic)
Valuation:
N/A
Permit #:
15000-01178
Status:
final
Fee:
$278
Permit Type:
N/A
Building Type:
N/A
Run new drain line for walk-in box 200 ft of 1 1/4 drain line to mop sink
Valuation:
N/A
Permit #:
PP20171006335
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Remove and replace four 5 ton gas/electric package units
Valuation:
$34,000
Permit #:
BLD2016-01655
Status:
final
Fee:
$1,048
Permit Type:
Repair
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Prime Mechanical Service Inc License info
Verified License
| License # | 708862 |
| Status | Active |
| State | California |
| Type | Warm Air Heating, Ventilating And Air Conditioning, Refrigeration |
| Business Type | Corporation, Sole Ownership |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Prime Mechanical Service Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 819114 |
| Status | Active |
| State | California |
| Type | Warm Air Heating, Ventilating And Air Conditioning, Refrigeration, Boiler, Hot Water Heating And Steam Fitting, Plumbing, General Building |
| Business Type | Corporation, Sole Ownership |
- BuildZoom verified this license was active as of February 2026.
Verify this license's status for Prime Mechanical Service Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 593917 |
| Status | Active |
| City | Milpitas |
| Type | General Contractor |
| Business Type | Corporation, Sole Ownership |
- When BuildZoom last verified this license, it had an expiration date of September, 2014. Check the current license status of Prime Mechanical Service Inc with the The City of Milpitas, CA
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 593917 |
| Status | Inactive |
| State | California |
| Type | Warm Air Heating, Ventilating And Air Conditioning |
| Business Type | Corporation, Sole Ownership |
- According to the California Contractors State License Board, 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 Prime Mechanical Service Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
105
BuildZoom Score
Bonded
| Bonded Agent | Business Alliance Insurance Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Workers' Compensation History |
41
Permits
- Building permit records show that Prime Mechanical Service Inc has worked on 41 permitted projects.
Prime Mechanical Service Inc Employees
JS
Joel George Sakamoto
Officer
JE
John Matthew Eshelman
Sole Owner
PM
Prime Mechanical
Owner
RO
Raymond Anthony Ortega
Sole Owner