✓

License is active

Source: Contractors State License Board (CSLB)

✓

Licensed

Current and in good standing

✓

Bonded

$25,000 surety bond

✓

Insured

Workers' comp coverage on file

✓

Clean record

No complaints or disciplinary actions

California licensing requirements →

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GREEN HAMMER DESIGN

License Number: 816480
State: California
Status: active
Business Type: Sole Owner
Address: 571 WALAVISTA AVENUE OAKLAND, CA, 94610 Alameda County
Phone: (510) 540 5558

License Dates

Issued

01/15/2003

Expires

01/31/2027

Expires in 10 months

Inactivated

08/02/2016

Reactivated

02/01/2017

CSLB Last Updated

12/23/2025

License Classifications

B General Building Contractor

Personnel & Officers

MUELLER TIMOTHY MICHAEL

Sole Owner

Active

Contractor Bond

Bonded

Amount: $25,000

Company: NORTH RIVER INSURANCE COMPANY (THE)

Bond #04CF607847

Effective: 01/01/2023

Workers' Compensation

Has policy

Carrier: STATE COMPENSATION INSURANCE FUND

Policy #9225375

Effective: 01/31/2026

Expires: 01/31/2027

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

126 Pierce St, 94117

replace (e) gas furnace and existing gas heater and replace with hybrid heating/cooling. add 1 dedicated 240v-30amp circuit, add 1 dedicated 240v- 15 amp circuit.

$25,000

2025-11-18

complete

otc alterations permit

2027 09th Av, 94116

revisoin to appl #2012.0515.0475 - minor alterations to framing: addition of non-structural wall behind cooktop. addition of 4 x8 heater at interior door at dining room/living room. alteration of kitc

$150

2012-07-19

expired

otc alterations permit

2027 09th Av, 94116

expand into (e) lightwell to create new laundry room at living level. also remodel (e) bathroom with new fixtures & finishes. replace 3 windows & 1 door as shown on plans, not visible from the street.

$25,000

2012-05-23

expired

otc alterations permit

2027 09th Av, 94116

complete kitchen remodel including new appliances, cabinets, countertops, electrical upgrade at kitchen, dining room & living room. (4) window replacement in same opening, smaller window & install ins

$45,000

2012-05-15

expired

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Data sourced from official state licensing board records. Always confirm critical information directly with the state board.