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Architect, San Francisco License 37652

Hellmuth, Obata, Kassabaum Inc

The city has issued 6 of the 8 San Francisco building permits that name Hellmuth, Obata, Kassabaum Inc since 2018. The work is mostly commercial, led by offices. Their busiest neighborhoods are Financial District/South Beach, South of Market and Bayview Hunters Point.

Issued by the city
6 of 8 filed since 2018
Rank for offices
No. 171 of 372 by offices issued
Overall rank
No. 823 of 1,543 architects and designers
Commercial share
88% last filing Sep 2021

What they work on

Every San Francisco building permit with Hellmuth, Obata, Kassabaum Inc on the record since 2018, by project type. Most filed: 7 offices, 1 home additions.

Residential and commercial, by permits filed

13% residential
88% commercial
Permits by project type, filed and issued
  1. Offices Commercial 5 of 7 issued 88% of filings.
  2. Home additions Residential 1 of 1 issued 13% of filings.

Permits over time

Permits filed each year, drawn as a street with one building per year, and how many of all their permits the city has issued.

Busiest year
2019
4 permits filed
Latest filing
Sep 2021
75% of 8 issued
Permits filed per year: 2018: 2, 2019: 4, 2020: 1, 2021: 1, 2022: 0, 2023: 0, 2024: 0, 2025: 0, 2026: 0. The 2026 figure runs through October 20, 2026.

One building per year, its height the permits filed. Each floor line marks 1 permit; the 2026 building is dashed because it counts permits filed through October 20, 2026.

Issued by the city: 6 of 8 permits filed

75%

All San Francisco project permits since 2018 in this data

93% issued

2 not issued as of October 20, 2026. Source: SF Department of Building Inspection permits via DataSF.

How fast their permits come through

Filing to issue for permits that went through plan review. Hellmuth, Obata, Kassabaum Inc has 4 of those across all project types; the citywide comparison is for offices, their most filed type, where 1,360 of 26,216 permits went through plan review and the rest were approved over the counter.

No median yet: fewer than 3 issued plan-review permits with usable dates.

Median months from filing to issue for plan-review permits. San Francisco, offices: 3.9 months. Middle half of city permits: 1.8 to 8.1 months.
45 other architects and designers ranked for offices have a median for it Each circle is a firm's median for its plan-review permits for offices. Dashed line: the median of all San Francisco plan-review permits for offices, 3.9 months. Shaded: the middle half of those permits, 1.8 to 8.1 months.
0 3 6 9 12 15+ months Revel Architecture & Design: 4.9 months Huntsman: 6.6 months Gensler: 5.4 months Rmw: 3.5 months Asd | Sky: 2.6 months Brereton Architects: 3.4 months Forge Architecture: 8.2 months Smith Group: 2.7 months Studios Architecture: 7.2 months Costa Brown Architecture: 12.1 months Ia Interior Architects: 7.7 months Rapt Studio: 9.6 months Som: 2.4 months Msa Architecture+Design: 5.0 months Perkins & Will: 5.1 months Tmda: 2.6 months Woods Bagot: 4.2 months Maccracken Architects: 19.3 months Dowler Gruman Architects: 6.5 months Hok: 4.9 months Gensler Architect: 5.9 months Quezada Architecture Inc: 6.4 months Mbh Architects: 14.7 months Michael Castro: 5.5 months Tef Design: 13.6 months Wrns Studio: 8.1 months Russell + Lopes Architects: 7.5 months Vocon: 5.1 months Bohlin Cywinski Jackson: 10.3 months Mbh: 3.7 months Shubin Donaldson: 5.4 months Polytech Assoicates: 2.5 months Mithun: 4.3 months Archtectural Resources Group: 4.1 months Brick: 4.6 months Ssdp: 5.2 months Studio Architecture: 14.9 months Page & Turnbull, Inc.: 8.5 months Red Cloud Wireless: 5.5 months Stantec Architecture Inc.: 18.6 months Pacific Das: 2.3 months Natoma Architects Inc.: 10.3 months Atelier 424: 2.6 months Studio Gang Architects: 2.9 months Owow Design: 4.3 months 0 3 6 9 12 15+ months Revel Architecture & Design: 4.9 months Huntsman: 6.6 months Gensler: 5.4 months Rmw: 3.5 months Asd | Sky: 2.6 months Brereton Architects: 3.4 months Forge Architecture: 8.2 months Smith Group: 2.7 months Studios Architecture: 7.2 months Costa Brown Architecture: 12.1 months Ia Interior Architects: 7.7 months Rapt Studio: 9.6 months Som: 2.4 months Msa Architecture+Design: 5.0 months Perkins & Will: 5.1 months Tmda: 2.6 months Woods Bagot: 4.2 months Maccracken Architects: 19.3 months Dowler Gruman Architects: 6.5 months Hok: 4.9 months Gensler Architect: 5.9 months Quezada Architecture Inc: 6.4 months Mbh Architects: 14.7 months Michael Castro: 5.5 months Tef Design: 13.6 months Wrns Studio: 8.1 months Russell + Lopes Architects: 7.5 months Vocon: 5.1 months Bohlin Cywinski Jackson: 10.3 months Mbh: 3.7 months Shubin Donaldson: 5.4 months Polytech Assoicates: 2.5 months Mithun: 4.3 months Archtectural Resources Group: 4.1 months Brick: 4.6 months Ssdp: 5.2 months Studio Architecture: 14.9 months Page & Turnbull, Inc.: 8.5 months Red Cloud Wireless: 5.5 months Stantec Architecture Inc.: 18.6 months Pacific Das: 2.3 months Natoma Architects Inc.: 10.3 months Atelier 424: 2.6 months Studio Gang Architects: 2.9 months Owow Design: 4.3 months

2 firms with medians over 15 months are drawn at the right edge.

Where they rank

Ranked by permits the city has issued since 2018, first across every project type, then for offices alone.

  1. 821 Architects Ii 6
  2. 822 Harlan R. Faust, Architect 6
  3. 823 Hellmuth, Obata, Kassabaum Inc 6
  4. 824 Matnokang Architects 6
  5. 825 Palazzo Projects 6

All permits issued, 1,543 architects and designers Full ranking

  1. 169 Dlr Group 5
  2. 170 Winston Win 5
  3. 171 Hellmuth, Obata, Kassabaum Inc 5
  4. 172 Bcci Builders 5
  5. 173 Goring & Straia Arch 5

Offices issued, 372 architects and designers Offices ranking

Where they work

The neighborhoods where Hellmuth, Obata, Kassabaum Inc files the most permits, and how many architects and designers count each one among their top 4 neighborhoods.

  1. 01 Financial District/South Beach 386 architects and designers count Financial District/South Beach among their busiest neighborhoods
  2. 02 South of Market 216 architects and designers count South of Market among their busiest neighborhoods
  3. 03 Bayview Hunters Point 133 architects and designers count Bayview Hunters Point among their busiest neighborhoods
  4. 04 Oceanview/Merced/Ingleside 70 architects and designers count Oceanview/Merced/Ingleside among their busiest neighborhoods

Questions for the first call

  1. Which of your recent San Francisco permits are closest to my project in type, size and neighborhood, and can I see the permit numbers?
  2. How long did those permits take from filing to issue, and what did plan check send back?
  3. Who on your team draws the set, who stamps it, and who answers the city's comments?

Other architects and designers for offices

Firms ranked near Hellmuth, Obata, Kassabaum Inc by permits issued for offices.

  1. 167 Amir Kakavand 5 offices issued
  2. 168 Brown Reynolds Watford Arch 5 offices issued
  3. 169 Dlr Group 5 offices issued
  4. 172 Bcci Builders 5 offices issued
  5. 173 Goring & Straia Arch 5 offices issued
  6. 174 Ap + I Design Inc 5 offices issued

See all 372 architects and designers ranked for offices

Sheet
A-823 No. 823 of 1,543
Drawing
Permit record, Hellmuth, Obata, Kassabaum Inc
Architect, San Francisco
License
37652 check with CAB
Data as of
Oct 2026
Scale
Not to scale

Built only from public San Francisco Department of Building Inspection records (permits, permit contacts), updated 2026-10-20. It is not a review or an endorsement, and Hellmuth, Obata, Kassabaum Inc has not paid to be listed. Project addresses are never shown.

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