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
Hiring this contractor?
Get alerts if their license status changes.
You're monitoring this license!
We'll email you if the license status, bond, or complaint history changes.
Something went wrong
Is this your business?
Claim your profile to manage your listing.
Claim request submitted!
We'll be in touch at the email you provided to verify your identity.
Something went wrong
AT6 ARCHITECTURE + DESIGN BUILD
- License Number
- 283485
- State
- California
- Status
- active
- Business Type
- Corporation
- Address
- 477 PACIFIC AVENUE SUITE 300 SAN FRANCISCO, CA, 94133 San Francisco County
- Phone
- (415) 503 0555
License Dates
Issued
04/04/1973
Expires
09/30/2027
Expires in 18 months
Reissued
09/07/2011
Inactivated
01/01/2006
Reactivated
10/23/2009
CSLB Last Updated
09/03/2025
License Classifications
Personnel & Officers
LANGKAMMERER GERALD W
Deceased
LANGKAMMERER JASON PARK
Responsible Managing Officer/Chief Executive Officer/President
Contractor Bond
Amount: $25,000
Company: AMERICAN CONTRACTORS INDEMNITY COMPANY
Bond #100174297
Effective: 01/01/2023
Workers' Compensation
Carrier: STATE COMPENSATION INSURANCE FUND
Policy #9135472
Effective: 06/18/2017
Expires: 06/18/2026
CSLB designation: Workers' Compensation Insurance
Complaints & Disciplinary History
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
784 Stanyan St, 94117
revision to pa# 2015 0210 7942 replace (e) lath plaster (pervious demod) w/forcefield firguard e-84 intumescent paint @ ceiling w/a 30mil min thickness. maher na
$1
otc alterations permit
225 Edgehill Wy, 94127
partial replacement, in kind of (e)hipped roof reframing at rear of building (north + north east elevation) front door replacement. window replacements. window replacements at rear and weat side (no i
otc alterations permit
769 Clayton St, 94117
remove (e) deck and stair at rear yard at level 2. build new deck and stair at same location.
otc alterations permit
134 Taraval St, 94116
7remodel of kitchen & 3 bathrms, rebuild stair to level 1, new door to rear yard. new french door at family room, new egress window at bedrm 3 & fill in (e) door at level 1. replace 3 windows & fill i
otc alterations permit
900 Clayton St, 94117
remodel to include 153 sf addition at floor 3 with flat service platform above and 61 sf addition at level 1 garage. all within (e) footprint. (n) windows at level 3 at rear facade and lightwell, repl
otc alterations permit
1851 Church St, 94131
legalize 296sf of unpermiited living space at garage level to include 4 bathroom and 4 bedroom. no change to exterior envelope
$76,000
2025-03-20
otc alterations permit
3771 Clay St, 94118
revision to pa#202311140775, install new prefabricated juliet balcany at level 2, within building setback and 5' from property line. additional roof framing at level 2. install new rear deck at level
$10,000
2025-01-22
otc alterations permit
148 Highland Av, 94110
114 sf addition at lvl 1. convert 30 sf of unconditioned garage space to conditioned living space, kitchen & bathroom renovation including filling in lightwell at level 2. lvl 2: new door & windows &
$189,000
2025-01-15
otc alterations permit
3771 Clay St, 94118
revision to permit 202311140775 to address dbi issued correction notice dated 7/22/24 regarding new scope fo demolition. revision includes replacement in kind of 1st and 2nd level southwest corner dem
$20,000
2024-08-01
additions alterations or repairs
2929 20th Av, 94132
interior remodel to (e) sfd: 1 bathroom remodel, convert a portion of garage to conditioned space (179 sf). seismic upgrades to ground fl. (note: all work at lvl 2 & exterior under 202403218358)
$75,000
2024-07-03
Showing 10 of 86 permits
Verify this record on the official state licensing board
View on Contractors State License Board (CSLB) →Learn how to verify contractor licenses in California
California licensing guide →Data sourced from official state licensing board records. Always confirm critical information directly with the state board.
Verify Another Contractor
Homeowner Resources
Other Licensed General Building Contractor in SAN FRANCISCO
NBAY CONSTRUCTION & REMODELING INC
License #1061179 · CA
RELATED CALIFORNIA CONSTRUCTION LLC
License #1061561 · CA
GREEN OAK BUILDERS INC
License #1061725 · CA
JUNDA CONSTRUCTION INC
License #1061932 · CA
HAMERKOP CONSTRUCTION INC
License #1061949 · CA