✓

License is active

Source: Contractors State License Board (CSLB)

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Licensed

Current and in good standing

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Bonded

$25,000 surety bond

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Insured

Workers' comp coverage on file

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Clean record

No complaints or disciplinary actions

California licensing requirements →

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U M B CORPORATION

DBA: U M B ENGINEERING INC

Owner: U M B ENGINEERING INC DBA U M B CORPORATION

License Number: 616478
State: California
Status: active
Business Type: Corporation
Address: 683 BRANNAN STREET #308 SAN FRANCISCO, CA, 94107 San Francisco County
Phone: (415) 355 1018

License Dates

Issued

03/25/1991

Expires

03/31/2027

Expires in 12 months

CSLB Last Updated

10/15/2025

License Classifications

B General Building Contractor

Personnel & Officers

CHOW PAUL TSAI-PON

Officer

Active

LAM MING YAN| LAM RYAN

Responsible Managing Officer/Chief Executive Officer/President

Active

WILLIAMS JOHN WYNFORD

Officer

Active

Contractor Bond

Bonded

Amount: $25,000

Company: AMERICAN CONTRACTORS INDEMNITY COMPANY

Bond #SC689049

Effective: 01/01/2023

Workers' Compensation

Has policy

Carrier: BENCHMARK INSURANCE COMPANY

Policy #99WC0000514400

Effective: 10/01/2025

Expires: 10/01/2026

CSLB designation: Workers' Compensation Insurance

Complaints & Disciplinary History

No disciplinary actions on file

This reflects CSLB's bulk license data. For detailed complaint history including pending investigations, check the official CSLB record.

Building Permits

Source: LA City Open Data (LADBS)

otc alterations permit

19 Clementina St, 94105

unit 405: relocate 1 fire alarm hornin unit 405: per milton yuen fire inspector

withdrawn

otc alterations permit

683 Brannan St, 94107

revision to 201607152439 to reduce scope of work. delete work at lot# and unit#:248/301, 249/302, 250/303, 251/304, 253/306, 255/308, 262/503, 263/504

2025-01-09

issued

otc alterations permit

178 Bluxome St, 94107

revision to 201604013788 to reduce scope of work. delete work at lot# and unit#: 289/301, 292/304, 296/308, 298/310, 299,311, 301/313, 302/501

2025-01-09

issued

otc alterations permit

673 Brannan St, 94107

revision to 201707283265 to reduce scope of work. delete work at lot# and unit#: 202/302, 203/303,210/310, 214/314, 214/314, 219/503, 221/505, 225/509, 228/512, 229/513. no work at these units

2025-01-09

issued

otc alterations permit

19 Clementina St, 94105

unit 405: relocate 1 fire alarm horn : per milton yuen fire inspector

2022-03-17

complete

otc alterations permit

19 Clementina St, 94105

unit 301: relocate 1 fire alarm horn : per milton yuen fire inspector

2022-03-17

complete

otc alterations permit

19 Clementina St, 94105

to obtain final inspection for work performed 201707283263 (0riginal), 201910033527 (renewal). all work is complete

2022-03-04

complete

otc alterations permit

168 Bluxome St, 94107

qualify mezzanine expansion as 2 additional stories converting a 4 story bldg to a six story bldg. the project was approved with mezzanine levels under app #9907388. the mezzanine levels were expanded

$100,000

2020-01-08

complete

otc alterations permit

19 Clementina St, 94105

commencement of work not started under previously approved permit application pa# 201603071304.

$20,000

2019-10-03

expired

otc alterations permit

673 Brannan St, 94107

commencement of work not started under previously approved permit application pa# 201707283265.