Updated: Jun 13, 2026
Location and Projects
Address
4020 ALVIS CT, Rocklin, CA, 95677
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John Marvin Walker HVAC/Mechanical Contractor
John Marvin Walker, 4020 Alvis Ct, Rocklin, CA (Employee: Walker, John Marvin) holds a Warm Air Heating, Ventilating And Air Conditioning license and 2 other licenses according to the California license board.
Their BuildZoom score of 103 ranks in the top 10% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring John Marvin Walker, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
John Marvin Walker Contact Information
Phone Number: (916) 630-2290
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Address: 4020 ALVIS CT, Rocklin, CA 95677
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John Marvin Walker Rocklin
Quality
103
90th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
John Marvin Walker has a BuildZoom score of 103, which places them above 90% of 336,931 contractors in California.
Activity
|
5 projects
|
2025 |
|
1 project
|
2024 |
Our building permit records indicate that John Marvin Walker 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
|
6 projects
|
HVAC projects |
Analyzing permits over the last 4 years shows that John Marvin Walker mostly works on
hvac project
projects.
Pricing
|
1 project
|
$5k-$20k |
|
1 project
|
$20k-$50k |
|
2 projects
|
$50k-$100k |
|
2 projects
|
$100k-$250k |
The typical size of their permits is approximately $81,393. 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.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Aa: change-out roof mount to a roof mount. cfm output of each system is >2 000 cfm building has fire sprinkler system (yes) building has fire alarm system (yes). automatic shutoff of the system is required upon smoke detection in accordance with the ca mechanical code. smoke detection devices shall be interconnected with the fire detection/fire alarm system provided for the building. ... see more
Valuation:
$14,000
Permit #:
BP24-09141
Status:
final
Fee:
$733
Permit Type:
N/A
Building Type:
N/A
Miscellaneous water heater electrical plumbing hvac mechanical solar/pv
2025-12-02
Christ community church: hvac like/like unit changeout
Valuation:
$173,000
Permit #:
MISC2025-00871
Status:
final
Fee:
$3,490
Permit Type:
N/A
Building Type:
N/A
Epc - 10-5-5 remove 50 ton hvac unit replace with a 60 ton hvac unit. remove 5 ton hvac unit and replacing with 5 ton unit this should have been built as repair maint
Valuation:
$85,569
Permit #:
COM-2402456
Status:
final
Fee:
$2,180
Permit Type:
N/A
Building Type:
N/A
Makse - r/r 6 rooftop gas packaged air conditioning units
Valuation:
N/A
Permit #:
2107-0262
Status:
final
Fee:
$474
Permit Type:
HVAC split system
Building Type:
N/A
Miscellaneous water heater electrical plumbing hvac mechanical solar/pv
2019-02-06
Replace existing hvac unit #27 with new hvac unit roof top unit heat pump/electric unit no btu rating
Valuation:
$17,915
Permit #:
MISC2019-00124
Status:
plancheck
Fee:
$521
Permit Type:
N/A
Building Type:
N/A
Replace 8 hvac units with duct alterations plus ventilation
Valuation:
$410,000
Permit #:
BC20-00247-MCH
Status:
final
Fee:
$7,800
Permit Type:
N/A
Building Type:
N/A
Miscellaneous water heater electrical plumbing hvac mechanical solar/pv
2017-04-24
6 ins. replacement of four hvac roofmount units that were vandalized. all units are like for like replacements. two 3 ton units one 4 ton unit & one 6 ton unit
Valuation:
$23,000
Permit #:
MISC2016-00595
Status:
complete
Fee:
$594
Permit Type:
N/A
Building Type:
N/A
Change out (10) rooftop hvac units
Valuation:
$174,367
Permit #:
COM-1605982
Status:
final
Fee:
$2,136
Permit Type:
N/A
Building Type:
N/A
Change out (10) rooftop hvac units
Valuation:
$174,367
Permit #:
COM-1605982
Status:
final
Fee:
$2,136
Permit Type:
N/A
Building Type:
N/A
Aa: change-out roof mount to a roof mount
Valuation:
$9,188
Permit #:
BP16-02721
Status:
final
Fee:
$176
Permit Type:
N/A
Building Type:
N/A
Hvac package roof top unit c/o for whole building
Valuation:
$138,925
Permit #:
2016-02402
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Replace one (1) hvac rooftop unit (like for like)
Valuation:
N/A
Permit #:
BLD16-01772
Status:
final
Fee:
N/A
Permit Type:
Mechanical
Building Type:
N/A
Aa: change-out roof mount to a roof mount
Valuation:
$9,188
Permit #:
BP16-02721
Status:
final
Fee:
$176
Permit Type:
N/A
Building Type:
N/A
Aa: change-out roof mount to a roof mount
Valuation:
$9,188
Permit #:
BP16-02721
Status:
final
Fee:
$176
Permit Type:
N/A
Building Type:
Commercial
Replace 4 hvac units on roof
Valuation:
N/A
Permit #:
11070146
Status:
final
Fee:
$56
Permit Type:
Non-residential
Building Type:
N/A
Install hvac system in existing building
Valuation:
$0
Permit #:
M9100209
Status:
Final
Fee:
$105
Permit Type:
N/A
Building Type:
N/A
Change out 2 roof mounted hvac units
Valuation:
$9,580
Permit #:
COM-0901720
Status:
final
Fee:
$755
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
25511
Status:
final
Fee:
$30
Permit Type:
Repair single family
Building Type:
N/A
Change out 2 roof mounted hvac units
Valuation:
$9,580
Permit #:
COM-0901720
Status:
final
Fee:
$755
Permit Type:
N/A
Building Type:
N/A
Trash container in view. refuse and waste
Valuation:
$0
Permit #:
COD2000-02396
Status:
Closed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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John Marvin Walker Reviews
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Verified License
BuildZoom confirmed this contractor's license
John Marvin Walker License info
Verified License
| License # | 482998 |
| Status | Active |
| State | California |
| Type | Warm Air Heating, Ventilating And Air Conditioning |
| Business Type | Individual |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for John Marvin Walker 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 # | 777459, 482998 |
| Status | Active |
| State | California |
| Type | Warm-Air Heating, Ventilating And Air-Conditioning, Contractor |
| Business Type | Individual |
- When BuildZoom last verified this license, it had an expiration date of May, 2012. Check the current license status of John Marvin Walker with the California Contractors State License Board
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 0071032 |
| Status | Inactive |
| State | Nevada |
| Type | C 21 B Air Conditioning |
| Business Type | Individual |
- According to the Nevada State Contractors 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 John Marvin Walker at the Nevada State Contractors Board.
This is a sample of licensing data; click here to access a complete history.
103
BuildZoom Score
Bonded
| Bonded Agent | Platte River Insurance Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Insurance Company Of The West |
24
Permits
- Building permit records show that John Marvin Walker has worked on 24 permitted projects.
John Marvin Walker Employees
JW
John Marvin Walker
RMO / CEO / PRES
WM
Walker, John Marvin
Owner Qualified Indi