Duncan Bruce Ballash
Architect · Ehdd Architecture · Palo Alto
Public records
From the licensing board and the city of San Francisco.
The short answer
- Licensed?
- License activeArchitect C-22066First issued Mar 8, 1991, expires Nov 30, 2027.
Source: DCA license roster, retrieved Nov 5, 2026
- Any board discipline?
- None found.
We searched the California Architects Board enforcement list on Nov 5, 2026.
- Worked in San Francisco?
- 16 permits since 2005, 16 in the last 5 years. Latest filed Sep 2, 2026.
- What kind of projects?
- Commercial or tenant improvement 9 · Other 5 · Home remodel 1
- How long do their permits take?
- Commercial or tenant improvement: within 1 month. City typical for the same review: within 1 month.
Permits filed each year
San Francisco permits by the year they were filed. The last 5 years are in blue.
What are you planning?
Pick your kind of project to see their permits for it.
Commercial or tenant improvement: 9 permits in San Francisco
Time to get a permit
Median from filing to permit, from 8 issued permits filed since 1966; 1 still in review. City is the San Francisco median for the same kind of review, from 5,514 permits.
Where
- Financial District/South Beach5
- Mission2
- Potrero Hill2
Most recent
- 2601 Mariposa StLevel 3: add walls + alter interior layout to provide separate tenant division on level 3.Sep 2, 2026Filed
- 900 Pennsylvania AvInstallation of a recessed floor scale. replacement of southern entry door in kind.Feb 24, 2022Complete
- 50 Beale StInterior renovation of level 4 including light demolition and minor layout changes of office spaces, and new lighting. maher naJan 17, 2019Complete
- 50 Beale StInterior renoavtion of (e) office space w/ light demo of private offices and installation of portable sound booths and open workstationsJan 16, 2019Complete
- 151 03rd StPermanent assembly permit including change in occupancy from a3 to a2 for 6 e spaces and change in occupant load/load factor in 2 spaces (levels 2/3) no physical changes to e building or fire l/s systems in this scope.all new revisions clouded in bold.changes due to 2016 code cycle/minor constructnJul 10, 2017Complete
| Filed | Project | Type | Status | Time to permit | Open |
|---|---|---|---|---|---|
| Sep 2, 2026 | 2601 Mariposa St Level 3: add walls + alter interior layout to provide separate tenant division on level 3. Filed | Commercial or tenant improvement | Filed | — | |
| Jul 31, 2023 | 900 Pennsylvania Av Alteration of (e) large refrigeration/freezer spaces, demo of (e) u nits & (e) slabs ongrade under units, install of new insulated slab, new refrigeration/freezer units w/high piled storage racks, & associated mep. revision apn#202006138695 Complete | Revision or supplement | Complete | Within 1 month | |
| Apr 5, 2022 | 2601 Mariposa St Revision to approved permit 201809251300-s3. to revise names of 4 assembly spaces to clarify room use for a3/a2. Complete | Revision or supplement | Complete | Within 1 month | |
| Feb 24, 2022 | 900 Pennsylvania Av Installation of a recessed floor scale. replacement of southern entry door in kind. Complete | Commercial or tenant improvementType unconfirmed | Complete | 1 month | |
| Dec 23, 2019 | 2601 Mariposa St Exterior signage including building donor name Complete | Other | Complete | Within 1 month | |
| Dec 23, 2019 | 2601 Mariposa St Exterior signage including iluminated kqed logo on metal panel Complete | Other | Complete | Within 1 month | |
| Dec 23, 2019 | 2601 Mariposa St Exterior signage including kqed logo on curtain wall Complete | Other | Complete | Within 1 month | |
| Feb 21, 2019 | 151 03rd St Install temporary structural steel interface to support temporary video display wall for exhibition. interface is between display structure and existing building structure. maher n/a Issued | Home remodelType unconfirmed | Issued | Within 1 month | |
| Jan 17, 2019 | 50 Beale St Interior renovation of level 4 including light demolition and minor layout changes of office spaces, and new lighting. maher na Complete | Commercial or tenant improvement | Complete | Within 1 month | |
| Jan 16, 2019 | 50 Beale St Interior renoavtion of (e) office space w/ light demo of private offices and installation of portable sound booths and open workstations Complete | Commercial or tenant improvement | Complete | Within 1 month | |
| Sep 25, 2018 | 2601 Mariposa St Enlarge entry & expand footprint @ nw corner. add mezz at roof level for multipurpose meeting room, catering kitchen, lunch room & roof terrace, renovation of interior spaces, seismic improvements, mep upgrades. maher n/a. Complete | Addition | Complete | 8 months | |
| Jul 10, 2017 | 151 03rd St Permanent assembly permit including change in occupancy from a3 to a2 for 6 e spaces and change in occupant load/load factor in 2 spaces (levels 2/3) no physical changes to e building or fire l/s systems in this scope.all new revisions clouded in bold.changes due to 2016 code cycle/minor constructn Complete | Commercial or tenant improvement | Complete | 1 month | |
| Feb 13, 2017 | 495 De Haro St Tenant improvement- convert some (e) warehouse apce in building for use as a small brewery and small tap room/bar. work includes addition of a bathroom, ramp, railings, and egress doors. change of occupancy a-2, f-2 (building) and tap room (retail), maher n/a Complete | Commercial or tenant improvement | Complete | 3 months | |
| Jul 1, 2016 | 151 03rd St Installation and seismic bracing of shelving units on floors; basement, 1,2, 9 & 10 of the sfmoma are museum. ref pa 2012-1109-3897s (r1) Issued | Revision or supplement | Issued | Within 1 month | |
| Jun 17, 2016 | 151 03rd St 7th & 8th fl: installation of new aluminum frame and millwork structure sliding wall panels of the sfmoma conservation studios for storage of artist materials. all storage portions of structure are <10' aff. revision pa 201211093897 to install only sliding panel structure Complete | Revision or supplement | Complete | Within 1 month | |
| Apr 7, 2016 | 151 03rd St Temporary modification of extg sfmoma expansion freight elevator l including removal of stop at ground floor level 1 and infill of extg door opening with 2 hour fire rated partition. fire alarm modifications under seperate permit. elevator modifications to be submitted to state elevator division Complete | OtherType unconfirmed | Complete | Within 1 month | |
| Feb 19, 2016 | 151 03rd St 7th floor:installation of a gypsum board ceiling in a 550 sq.ft. gallery on level 7, work to include modification to existing mechanical supply diffusers and new lighting. ref. to sfmoma expansion pa#201211093987 & temp. wall pa#201507302945. n/a ordinance #155-13 Complete | Revision or supplement | Complete | Within 1 month | |
| May 1, 2014 | 4 Embarcadero Center 33rd floor tenant improvement of a 600 sq ft area. no structural or plumbing work. demo & patching of interior doors. walls, ceilings, & finishes, new power/data outlets & lighting. compliance with ord 155-13 not rquired Complete | Commercial or tenant improvement | Complete | Within 1 month | |
| Jun 19, 2013 | 140 New Montgomery St 21st floor tenant improvement, interior office remodel including mechanical, electrical & plumbing work, construction of non-rated partitoins & interior finishes. Complete | Commercial or tenant improvement | Complete | 1 month | |
| Aug 1, 2008 | 500 Treat Av #201-tenant improvement on partial 1st floor of building, minor wall demolition and construction, rerouting/capping of outlet switches and lighting, casework renovation Complete | Commercial or tenant improvement | Complete | Within 1 month |
Sources: DataSF i98e-djp9, 3pee-9qhc, retrieved Nov 5, 2026. Names on permits are matched to licenses by license number and name; unmatched records are not shown.
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