Updated: May 22, 2026
Location and Projects
Address
2517 WILLIAM ST, San Leandro, CA, 94577
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Alpha One Roofing
Alpha One Roofing, 2517 William St, San Leandro, CA (Employees: Jaime Arellano, Susan Lau Arellano, and Susan Lau Arellano) holds a Roofing license according to the California license board.
Their BuildZoom score of 98 ranks in the top 16% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Alpha One Roofing, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Alpha One Roofing Contact Information
Phone Number: (510) 904-2024
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Address: 2517 WILLIAM ST, San Leandro, CA 94577
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Alpha One Roofing San Leandro
Quality
98
84th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Alpha One Roofing has a BuildZoom score of 98, which places them above 84% of 336,931 contractors in California.
Activity
|
1 project
|
2025 |
|
2 projects
|
2024 |
|
1 project
|
2023 |
Our building permit records indicate that Alpha One Roofing has worked on at least
4.0 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.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Experience
|
4 projects
|
Roofing projects |
Analyzing permits over the last 4 years shows that Alpha One Roofing mostly works on
roofing project
projects.
Pricing
|
1 project
|
< $5k |
|
2 projects
|
$5k-$20k |
|
1 project
|
$20k-$50k |
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.
Main house: remove the existing roof membrane and cover board and save the roof insulation. supply and install a new cover board adhered to the roof insulation and a new tpo membrane garage: remove the existing roof system and install a new 3-ply torch roof system
Valuation:
$38,600
Permit #:
B39439
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential
Roof permit: removal of existing roof shingles and felt. install new underlayment and new asphalt shingles. tear off re-sheet install 25 squares of 30 yr laminated dimensional composition roofing material. in-progress inspection required if 10 squares or greater. cf-6r-env-01 required at final inspection. cf-1r-alt on file. carbon monoxide & smoke alarms required. reference crc sectio... see more
Valuation:
$15,000
Permit #:
RES-2326294
Status:
final
Fee:
$235
Permit Type:
N/A
Building Type:
Single family
Remove concrete tile install 30lbs felt & timberline hd2 comparable shingle life time
Valuation:
$0
Permit #:
2024 086994 RS
Status:
final
Fee:
$0
Permit Type:
Single-family
Building Type:
N/A
Refer to ble2025-00280 reroof - one/two family residential new roof: tear-out and composition asphalt shingle class a area 20 squares use existing roof deck remove composition asphalt shingle install composition asphalt shingle
Valuation:
$9,820
Permit #:
BLD2025-04253
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Alpha One Roofing Reviews
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Alpha One Roofing License info
Verified License
| License # | 1106302 |
| Status | Active |
| State | California |
| Type | Roofing |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Alpha One Roofing at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
98
BuildZoom Score
Bonded
| Bonded Agent | This License Filed A Contractor's Bond With |
| Bond Value | $25,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
Alpha One Roofing Employees
JA
Jaime Arellano
Sole Owner
SA
Susan Lau Arellano
Officer
SA
Susan Lau Arellano
Officer