ON TUNG INC
License
- Status
- CLEAR
- First issued
- July 23, 2015
- Expires
- July 31, 2027
- Entity
- Corporation
- Address of record
- 575 2ND AVENUE, San Francisco, CA 94118
- Phone of record
- (415) 310 7573
Contractor bond
- Surety
- ATLANTIC SPECIALTY INSURANCE COMPANY
- Bond number
- 800271953
- Amount
- $25,000
- Effective
- September 1, 2026
Workers’ compensation
This contractor has certified to the state that they have no employees, so they carry no workers’ compensation policy. The exemption covers only the license holder. If anyone else works on your project — a crew, a helper, a day laborer — they are not covered, and an injury on your property can become your liability. Ask who will physically be on site.
Are they licensed for your job?
A California contractor may only contract for work their classification covers. Pick the job and this reads the license on file against it.
Licensed to perform
A contractor may only contract for work within their classifications. See all 2,238 licensed general building contractors in San Francisco.
People on this license
| Name | Title | Since | Through |
|---|---|---|---|
| WEN DINGSHENG | Responsible Managing Officer/Chief Executive Officer/President | October 18, 2020 | Current |
| LEE ON | Responsible Managing Officer | July 23, 2015 | October 18, 2020 |
| WEN DINGSHENG | Chief Executive Officer/President | July 23, 2015 | October 18, 2020 |
Verified status badge
Put this on your website or in a bid packet. It reads the state’s record live every time someone loads it, so it is never a screenshot of a good day. Free, and you don’t need to claim this listing to use it.
<a href="https://bookofbuilders.com/license/1005809" target="_blank" rel="noopener">
<img src="https://bookofbuilders.com/badge/1005809.svg" alt="ON TUNG INC — California contractor license #1005809 status, verified against CSLB records" width="268" height="76">
</a>The badge shows whatever the CSLB record says — including a suspension or lapsed coverage. There is no paid version and no way to change what it displays. That is what makes it worth showing. The same data as JSON if you’d rather build your own.
Is this your license?
Claim this page to add your photos, description, service area and contact details. The state’s record above stays exactly as it is — claiming adds to a page, it never edits or hides anything the CSLB reports.
Source: California Contractors State License Board public records. Coverage lapse is evaluated against today’s date; all other fields reflect the latest weekly CSLB file. Confirm at the CSLB’s official record before signing a contract.