Updated: Jun 01, 2026
Location and Projects
Address
2313 4TH STREET, Berkeley, CA, 94710
Use our bidding system to
request a quote
Alter Systems Solar Contractor
Alter Systems at 2313 4TH STREET, Berkeley, CA 94710, held a Solar Contractor license (#894052) with the California contractors license board with an expiration date of 04-30-2009. We last verified the license was expired on 05-31-2026.
Their BuildZoom score is 0 because we haven’t been able to verify an active license. As a result, they’re not ranked in the top 50% of 336,931 California contractors.
If you’re thinking about hiring them, we recommend double-checking their license status with your local licensing authority. Alternatively, use our bidding system to be easily matched to qualified, licensed professionals in your area.
Alter Systems Contact Information
Phone Number: (510) 502-7402
Edit
Address: 2313 4TH STREET, Berkeley, CA 94710
Edit
Do you work for this business? Unlock this free profile to update company info and see who's viewing your profile.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Install 3.71 kw photovoltaic solar panels on roof top field inspector to verify the following: 1) 3 clearance for panel spacing at ridges eaves hips and valleys. 2) total panel weight (including frame) is not greater than 5lbs sq ft 3) maximum concentrated load at each point of support is not greater than 40lbs 4) maximum height above the roof surface does not exceed 18
Valuation:
$20,000
Permit #:
2014 040749 RS
Status:
final
Fee:
N/A
Permit Type:
Single family
Building Type:
N/A
Install a 4.32kw grid tie photovoltaic system using sun edison 2.70 modules(16) & euphone unvio inverters(16)
Valuation:
$12,000
Permit #:
BLDG-14-0829
Status:
complete
Fee:
$135
Permit Type:
N/A
Building Type:
N/A
New ground mount solar photovoltaic panels for single family dwelling - battery based 375 amp/hr battery bank - 48 volts- 3.24 kw
Valuation:
N/A
Permit #:
BLD15-3240
Status:
final
Fee:
$1,343
Permit Type:
N/A
Building Type:
N/A
Revised description: 9/11/12 - tb install roof mounted solar photovoltaic system to include 3.66 psf total panel weight (including frame) and 39.6 lbs per each load point of support. the lowest point to highest point above the roofline is 6 ft high (needs building permit)
Valuation:
$29,950
Permit #:
2012 016998 RS
Status:
final
Fee:
N/A
Permit Type:
Single family
Building Type:
N/A
Install solar photovoltaic system and panel upgrade: 2.56 psf total panel weight (including frame) 27.43 lbs per each load point of support and not more than 18 above roofline. total of 24 panels reference plans in field
Valuation:
$29,600
Permit #:
2012 026796 RS
Status:
final
Fee:
N/A
Permit Type:
Single family
Building Type:
N/A
Solar permit (for commercial projects residential projects not eligible for solarapp+ or owner/build
2016-05-13
Install roof mounted 4.86kw solar photovoltaic system for 7 unit apartment. the system will be installed on rear detached garage
Valuation:
$1,001
Permit #:
SE1500875
Status:
final
Fee:
$222
Permit Type:
N/A
Building Type:
N/A
Permit value$1k install roof mounted 4.86kw solar photovoltaic system for 7 unit apartment. the system will be installed on rear detached garage
Valuation:
N/A
Permit #:
SE1500875
Status:
PERMIT ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install residential roof mounted 5.56 kw photovoltaic system with 21 panels and back up battery
Valuation:
N/A
Permit #:
BIPVR16-002105
Status:
final
Fee:
$401
Permit Type:
N/A
Building Type:
N/A
Solar permit (for commercial projects residential projects not eligible for solarapp+ or owner/build
2016-08-30
Install 4.56 k w roof mounted solar p v system (16 modules) and connect to existing 200 amp service for single family dwelling
Valuation:
$1,001
Permit #:
SE1600500
Status:
final
Fee:
$377
Permit Type:
N/A
Building Type:
N/A
Install residential roof mounted 7.24 kw photovoltaic system with 23 panels ** 9/19/16 - reinstate permit @ 10%exp for final inspection **
Valuation:
N/A
Permit #:
BIPVR16-002103
Status:
final
Fee:
$508
Permit Type:
N/A
Building Type:
N/A
26 roof mounter solar photovoltaic modules 270 watts per module 1 interactive inverter 7700 power each
Valuation:
$0
Permit #:
E201507089907
Status:
ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Permit value$1kmessage contractor install 24 solar panels total in 2 separate groups on(e)2x6 roof rafters @ 24"o.c. also install combiner box on roof & inverter box on left side of house w/ac & dc disconnects
Valuation:
N/A
Permit #:
SE0900078
Status:
EXPIRED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Solar permit (for commercial projects residential projects not eligible for solarapp+ or owner/build
2016-06-10
Install roof mounted 4.8 kw solar photovoltaic system 16 modules for single family dwelling
Valuation:
$1,001
Permit #:
SE1600383
Status:
final
Fee:
$377
Permit Type:
N/A
Building Type:
N/A
Install roof top photovoltaic system
Valuation:
$29,900
Permit #:
B13-00343
Status:
final
Fee:
$380
Permit Type:
Solar
Building Type:
N/A
Addition to an existing photovoltaic system: install. 1.04kw solar panels on roof. must comply with fire zone restrictions
Valuation:
$0
Permit #:
B2014-00711
Status:
Closed Complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
26 roof mounter solar photovoltaic modules 270 watts per module 1 interactive inverter 7700 power each
Valuation:
N/A
Permit #:
E201507089907
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Solar 5.2kw roof mount system on single family dwelling
Valuation:
N/A
Permit #:
BLD15-4508
Status:
final
Fee:
$548
Permit Type:
N/A
Building Type:
N/A
Install 7.5kw photovoltaic solar panels on roof
Valuation:
$0
Permit #:
B2015-04207
Status:
Issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Solar permit (for commercial projects residential projects not eligible for solarapp+ or owner/build
2016-05-04
Install roof mounted 5.04 kw solar photovoltaic system for single family dwelling
Valuation:
$1,001
Permit #:
SE1600220
Status:
final
Fee:
$424
Permit Type:
N/A
Building Type:
N/A
Install 8.9kw photovoltaic system on the rooftop
33 panels
Valuation:
$33,000
Permit #:
B151451
Status:
final
Fee:
$487
Permit Type:
N/A
Building Type:
N/A
Similar Contractors See more
126
BZ Score
$39K
Avg Project
-
Projects
130
BZ Score
$28.1K
Avg Project
-
Projects
License # 991938
Petaluma, CA
128
BZ Score
$30.2K
Avg Project
-
Projects
Alter Systems Reviews
BuildZoom hasn't received any reviews for Alter Systems. Click here to be alerted when reviews are posted about them.
Recent Buildzoom Projects
Hiring a contractor?
Alter Systems License info
Inactive License
| License # | 894052 |
| Status | Inactive |
| State | California |
| Type | Solar |
| Business Type | 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 Alter Systems at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 910719 |
| Status | Inactive |
| State | California |
| Type | Solar |
| Business Type | 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 Alter Systems at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
ALERT*
BuildZoom Score
- How the BuildZoom Score works
- *No active license on file. If you are Alter Systems, click “This is My Business” to update your information.
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
107
Permits
- Building permit records show that Alter Systems has worked on 107 permitted projects.
Alter Systems Employees
FV
Fernando Jose Valenzuela
Sole Owner
PY
Pedro Jose Yribarren
Sole Owner