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Location and Projects

Address
2015 Yolo Ave, Berkeley, CA, 94707
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A1 Sun Solar Contractor

Design optimizations and solutions for solar photovoltaic and thermal projects

From BuildZoom: A1 Sun Inc, 2015 Yolo Ave, Berkeley, CA (Employees: Ben Giustino, Kathleen Giustino, and Keli Yaris) holds a General Building license according to the California license board.

Their BuildZoom score of 126 ranks in the top 1% of 336,931 California licensed contractors.

Their license was verified as active when we last checked. If you are thinking of hiring A1 Sun Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.

A1 Sun Inc Services

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A1 Sun Inc Contact Information

Phone: (510) 526-5715
Address: 2015 Yolo Ave, Berkeley, CA 94707

A1 Sun Inc Berkeley

Quality

126
99th percentile
Pro tip: We generally recommend hiring a contractor with a score higher than 95.
A1 Sun Inc has a BuildZoom score of 126, which places them above 99% of 336,931 contractors in California.

Activity

27 projects
2025
57 projects
2024
63 projects
2023
Our building permit records indicate that A1 Sun Inc has worked on at least 147.0 projects over the past 3 years.

This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.

Experience

8 projects
Home Additions
3 projects
New Constructions
137 projects
Solar installations
Analyzing permits over the last 4 years shows that A1 Sun Inc mostly works on solar installation and home addition projects.

Pricing

1 project
< $5k
7 projects
$5k-$20k
31 projects
$20k-$50k
1 project
$50k-$100k
Value Not Public: 104.0 projects
The typical size of their permits is approximately $30,000. 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.

Building Permits by A1 Sun Inc

Sort by: Notable Notable | Date Date | Job Value Job Value
Remove existing photovoltaic solar & install 5.46 kw photovoltaic solar panels (13 modules) on the roof with three (3) energy storage systems (15 kwh) energy storage system
Valuation:
N/A
Permit #:
B2025-00060
Status:
issued
Fee:
$463
Permit Type:
N/A
Building Type:
N/A
Install 11.04 kw photovoltaic solar panels (24 modules) on the roof with a 20 kwh energy storage system (6 batteries) & 125 amp subpanel. fire zone 2 property
Valuation:
N/A
Permit #:
B2025-01562
Status:
issued
Fee:
$596
Permit Type:
N/A
Building Type:
N/A
Install 4.62 kw photovoltaic solar panels (12 modules) on the roof with a 10 kwh energy storage system. connected to electrical meter at 2829 piedmont ave. (deferred photovoltaic submittal for b2023-06361.)
Valuation:
N/A
Permit #:
B2025-02263
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Addition 0.92 kw photovoltaic solar panels (2 modules) on the roof with two (2) energy storage systems (10 kwh) to existing photovoltaic solar
Valuation:
N/A
Permit #:
B2025-00864
Status:
canceled
Fee:
$195
Permit Type:
N/A
Building Type:
N/A
New 8.61kw solar photovoltaic installation. 21 modules flush mounted on roof. 20kwh energy storage system to be installed in detach garage
Valuation:
N/A
Permit #:
B2025-00276
Status:
plancheck
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Plan check
2025-03-05
Correct wording & electrical line drawing to indicate exact field installation. no increase in valuation. fire zone 2 property
Valuation:
N/A
Permit #:
B2025-00499-REV01
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install 5.2 kw photovoltaic solar panels (13 modules) on the roof with a 10 kwh energy storage system. fire zone 2 property
Valuation:
N/A
Permit #:
B2025-00500
Status:
issued
Fee:
$255
Permit Type:
N/A
Building Type:
N/A
Install 5.72 (dc) 4.54 (ac) kw photovoltaic solar panels (13 modules) on the roof with two (2) energy storage systems (20 kwh total). fire zone 2 property
Valuation:
N/A
Permit #:
B2025-03615
Status:
final
Fee:
$457
Permit Type:
N/A
Building Type:
N/A
Minor permit for reroof hvac water heater seismic gas shut-off valve. (r-3 occupancies only)
2022-02-10
Remove existing photovoltaic solar & install new 7.31 kw photovoltaic solar panels (18 modules) on the roof with a new 125 amp subpanel. fire zone 2 property **revision 01 to remove 125 amp subpanel from the scope of work & show connection of the photovoltaic solar to the existing 150 amp subpanel. no increase in valuation. fire zone 2 property
Valuation:
N/A
Permit #:
B2022-00605
Status:
final
Fee:
$327
Permit Type:
N/A
Building Type:
N/A
Solar - residential
2025-09-03
Roof mountned photovoltaic system 6.45 kw 2 ess
Valuation:
$50,000
Permit #:
M25-032840
Status:
issued
Fee:
$415
Permit Type:
N/A
Building Type:
N/A
Install 6.6 kw photovoltaic solar panels (15 modules) on the roof with a 10 kwh energy storage system with meter collar microgrid interconnect device
Valuation:
N/A
Permit #:
B2025-02254
Status:
issued
Fee:
$255
Permit Type:
N/A
Building Type:
N/A
Install 4.40 (dc) 3.49 (ac) kw photovoltaic solar panels (10 modules) on the roof with a 10 kwh energy storage system & new 125 amp subpanel
Valuation:
N/A
Permit #:
B2025-03116
Status:
issued
Fee:
$430
Permit Type:
N/A
Building Type:
N/A
Residential
2025-04-28
4.73kw solar photovoltaic installation. 15kwh energy storage system.n
Valuation:
$43,000
Permit #:
BD25-0434
Status:
issued
Fee:
$479
Permit Type:
Solar electric
Building Type:
N/A
Install 5.06 kw photovoltaic solar panels (11 modules) on the roof. fire zone 2 property
Valuation:
N/A
Permit #:
B2025-00499
Status:
issued
Fee:
$227
Permit Type:
N/A
Building Type:
N/A
Install 6.45 (dc) 5.235 (ac) kw photovoltaic solar panels (15 modules) on the roof
Valuation:
N/A
Permit #:
B2025-00285
Status:
issued
Fee:
$329
Permit Type:
N/A
Building Type:
N/A
Minor permit for reroof hvac water heater seismic gas shut-off valve. (r-3 occupancies only)
2022-02-22
Install 6.84 kw photovoltaic solar panels (18 modules) on the roof. fire zone 2 property **revision 01 to remove upgrading the main service panel from the scope of work. change equipment locations. no increase in valuation
Valuation:
N/A
Permit #:
B2022-00765
Status:
final
Fee:
$327
Permit Type:
N/A
Building Type:
N/A
Install 5.28 (dc) 4.56 (ac) kw photovoltaic solar panels (12 modules) on the roof with two (2) energy storage systems (10 kwh total)
Valuation:
N/A
Permit #:
B2025-02463
Status:
issued
Fee:
$195
Permit Type:
N/A
Building Type:
N/A
Install two (2) energy storage systems (10 kwh) to existing photovoltaic solar
Valuation:
N/A
Permit #:
B2025-00159
Status:
issued
Fee:
$255
Permit Type:
N/A
Building Type:
N/A
New 4.73kw solar photovoltaic installation. 11 modules flush mounted on roof. 10kwh energy storage system
Valuation:
$41,000
Permit #:
B2025-03290
Status:
final
Fee:
$457
Permit Type:
N/A
Building Type:
N/A
Residential solar permit
2025-08-05
New 7.48kw solar photovoltaic installation. (17) modules flush mounted on roof. 10kwh energy storage system (1) battery
Valuation:
$40,000
Permit #:
BRSOLAR-25-0127
Status:
final
Fee:
$523
Permit Type:
New
Building Type:
N/A

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