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Architect, San Francisco License C12720

Leddy May Tun Stacy Arch.

The city has issued 9 of the 9 San Francisco building permits that name Leddy May Tun Stacy Arch. since 2018. The work is mostly residential, led by apartments and multifamily. Their median plan-review permit for apartments and multifamily took 2.3 months from filing to issue, 63% faster than the citywide median. Their busiest neighborhoods are Mission, Mission Bay and Hayes Valley.

Also filed as
engineer
Issued by the city
9 of 9 filed since 2018
Median plan-review time, apartments and multifamily
2.3 mo city median 6.2 mo
Rank for apartments and multifamily
No. 192 of 659 by apartments and multifamily issued
Overall rank
No. 656 of 1,543 architects and designers

What they work on

Every San Francisco building permit with Leddy May Tun Stacy Arch. on the record since 2018, by project type. Most filed: 8 apartments and multifamily, 1 home additions.

Residential and commercial, by permits filed

100% residential
Permits by project type, filed and issued
  1. Apartments and multifamily Residential 8 of 8 issued 89% of filings.
  2. Home additions Residential 1 of 1 issued 11% 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
2021
3 permits filed
Latest filing
May 2023
100% of 9 issued
Permits filed per year: 2018: 2, 2019: 2, 2020: 0, 2021: 3, 2022: 1, 2023: 1, 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: 9 of 9 permits filed

100%

All San Francisco project permits since 2018 in this data

93% issued

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. Leddy May Tun Stacy Arch. has 4 of those across all project types; the citywide comparison is for apartments and multifamily, their most filed type, where 3,633 of 59,927 permits went through plan review and the rest were approved over the counter.

Leddy May Tun Stacy Arch., apartments and multifamily

2.3months

That is 63% faster than the citywide median for apartments and multifamily.

Median months from filing to issue for plan-review permits. Leddy May Tun Stacy Arch., apartments and multifamily: 2.3 months. San Francisco, apartments and multifamily: 6.2 months. Middle half of city permits: 2.7 to 12.3 months.
2.3 months for apartments and multifamily, faster than 102 of 104 other architects and designers ranked for apartments and multifamily that have a median for it Each circle is a firm's median for its plan-review permits for apartments and multifamily. Dashed line: the median of all San Francisco plan-review permits for apartments and multifamily, 6.2 months. Shaded: the middle half of those permits, 2.7 to 12.3 months.
0 3 6 9 12 15 18 21+ months Halyard Construction Inc.: 6.2 months Hkit Architects: 9.4 months Shatara Architecture: 17.7 months Xie Associates: 9.0 months Thousand Architects: 8.9 months Syncopated Architecture: 8.6 months Openscope Studio: 5.4 months Hood Thomas Architects: 13.0 months Gelfand Partners Architects: 4.5 months Gensler: 5.1 months Architects Sf: 11.4 months Arcus Architecture & Planning: 4.8 months Ssdp: 5.2 months Levy Design Partners: 9.8 months Stanton Architecture: 11.2 months Topetcher Architectural: 12.6 months Kotas/Pantaleoni Architects: 13.2 months David Baker Architects: 9.3 months Ya Studio: 8.9 months Nathan Simpson Architect: 18.5 months Jason M.J.Chan Architect: 3.2 months Jorge Carbonell Architecture: 5.1 months Troy Kashanipour: 14.6 months Rg-Architecture: 9.8 months D-Scheme Studio: 8.6 months Schaub | Li | Architects: 19.3 months Houston / Tyner: 6.9 months Beaumont & Associates: 25.2 months Cm Architects: 14.3 months Kerman Morris Architects: 13.9 months Bde Architecture: 15.9 months Tecta Associates: 12.6 months Martinkovic Milford Architects: 9.8 months Mithun Architects: 3.9 months Leavitt Architecture: 5.0 months Bar Architects: 7.6 months Peter Petruzzi Architect: 6.2 months Ottolini Booth & Associates: 13.3 months Gary Gee Architects, Inc.: 30.9 months Chris Sullivan: 11.0 months Ankrom Moisan: 6.1 months Paulett Taggart Architects: 6.2 months Dnm Architect: 9.9 months Knock Arch & Design: 12.4 months William Pashelinsky Arch.: 32.0 months Red Cloud Wireless: 5.1 months Huang Iboshi Architecture: 20.3 months Michael Harris Architecture: 9.9 months Aaron Lim Design: 9.1 months Rodgers Architecture: 11.5 months Mml Architect: 11.4 months Zachary Nathan Architect: 12.1 months Sutro Architects: 16.0 months Robles & Assocciates: 18.7 months Solomon Cordwell Buenz: 16.2 months Louis Felthouse: 24.1 months Handel Architects,Llp: 9.1 months Pacific Das: 4.6 months John Lum Architecture: 15.8 months Santos Prescott & Assoc.: 6.6 months Baukunst: 7.6 months Studio 12 Architecture: 24.2 months Harvey Hacker Architects: 15.6 months Plinth Architecture: 10.0 months Hks Architects: 7.7 months The John Stewart Company: 6.8 months Som: 9.2 months Mason Kirby Inc.: 12.0 months Rex Mclean Architects: 8.8 months Farrrell Architecture: 6.8 months Bunton Mousavi Architecture: 3.4 months Natoma Architects Inc.: 6.4 months Stan Teng Architecture Studio: 7.0 months Arquitectonica: 3.9 months Mark Cavagnero Associates: 8.8 months Page & Turnbull, Inc.: 12.7 months Perry Architectus, Inc.: 17.0 months L.A. Paul & Associates: 29.0 months Ccs Architecture: 8.3 months Field Paoli Architects: 3.0 months Dmarc Studio: 13.2 months Van Meter Williams Pollack Llp: 12.7 months Sternberg Benjamin Architects: 15.0 months Steinberg Hart: 6.4 months Sgpa Arch & Planning: 13.8 months Leddy Maytum Architects: 22.4 months Winder Gibson Architects: 33.5 months Herman Coliver Locus Arch: 2.7 months Corbel Architects: 7.1 months Caroline Souza: 1.4 months Leddy Maytum Stacy Archi: 14.7 months Winder Gison Architects: 31.7 months Dumican Mosey Architects: 15.2 months Mavrik Studio: 6.7 months Leonardozylberberg Architect: 37.8 months Mbh: 10.2 months Interstice Architects: 9.4 months Nastaran Mousavi: 11.5 months Angela Matt Architect, Inc.: 1.4 months Century Electric: 11.7 months James Gates Architectural Corp: 5.6 months Page & Turnboll: 5.1 months Marx | Okubo Associates Inc: 4.4 months Tk Architect: 7.2 months Leddy May Tun Stacy Arch. 0 3 6 9 12 15 18 21+ months Halyard Construction Inc.: 6.2 months Hkit Architects: 9.4 months Shatara Architecture: 17.7 months Xie Associates: 9.0 months Thousand Architects: 8.9 months Syncopated Architecture: 8.6 months Openscope Studio: 5.4 months Hood Thomas Architects: 13.0 months Gelfand Partners Architects: 4.5 months Gensler: 5.1 months Architects Sf: 11.4 months Arcus Architecture & Planning: 4.8 months Ssdp: 5.2 months Levy Design Partners: 9.8 months Stanton Architecture: 11.2 months Topetcher Architectural: 12.6 months Kotas/Pantaleoni Architects: 13.2 months David Baker Architects: 9.3 months Ya Studio: 8.9 months Nathan Simpson Architect: 18.5 months Jason M.J.Chan Architect: 3.2 months Jorge Carbonell Architecture: 5.1 months Troy Kashanipour: 14.6 months Rg-Architecture: 9.8 months D-Scheme Studio: 8.6 months Schaub | Li | Architects: 19.3 months Houston / Tyner: 6.9 months Beaumont & Associates: 25.2 months Cm Architects: 14.3 months Kerman Morris Architects: 13.9 months Bde Architecture: 15.9 months Tecta Associates: 12.6 months Martinkovic Milford Architects: 9.8 months Mithun Architects: 3.9 months Leavitt Architecture: 5.0 months Bar Architects: 7.6 months Peter Petruzzi Architect: 6.2 months Ottolini Booth & Associates: 13.3 months Gary Gee Architects, Inc.: 30.9 months Chris Sullivan: 11.0 months Ankrom Moisan: 6.1 months Paulett Taggart Architects: 6.2 months Dnm Architect: 9.9 months Knock Arch & Design: 12.4 months William Pashelinsky Arch.: 32.0 months Red Cloud Wireless: 5.1 months Huang Iboshi Architecture: 20.3 months Michael Harris Architecture: 9.9 months Aaron Lim Design: 9.1 months Rodgers Architecture: 11.5 months Mml Architect: 11.4 months Zachary Nathan Architect: 12.1 months Sutro Architects: 16.0 months Robles & Assocciates: 18.7 months Solomon Cordwell Buenz: 16.2 months Louis Felthouse: 24.1 months Handel Architects,Llp: 9.1 months Pacific Das: 4.6 months John Lum Architecture: 15.8 months Santos Prescott & Assoc.: 6.6 months Baukunst: 7.6 months Studio 12 Architecture: 24.2 months Harvey Hacker Architects: 15.6 months Plinth Architecture: 10.0 months Hks Architects: 7.7 months The John Stewart Company: 6.8 months Som: 9.2 months Mason Kirby Inc.: 12.0 months Rex Mclean Architects: 8.8 months Farrrell Architecture: 6.8 months Bunton Mousavi Architecture: 3.4 months Natoma Architects Inc.: 6.4 months Stan Teng Architecture Studio: 7.0 months Arquitectonica: 3.9 months Mark Cavagnero Associates: 8.8 months Page & Turnbull, Inc.: 12.7 months Perry Architectus, Inc.: 17.0 months L.A. Paul & Associates: 29.0 months Ccs Architecture: 8.3 months Field Paoli Architects: 3.0 months Dmarc Studio: 13.2 months Van Meter Williams Pollack Llp: 12.7 months Sternberg Benjamin Architects: 15.0 months Steinberg Hart: 6.4 months Sgpa Arch & Planning: 13.8 months Leddy Maytum Architects: 22.4 months Winder Gibson Architects: 33.5 months Herman Coliver Locus Arch: 2.7 months Corbel Architects: 7.1 months Caroline Souza: 1.4 months Leddy Maytum Stacy Archi: 14.7 months Winder Gison Architects: 31.7 months Dumican Mosey Architects: 15.2 months Mavrik Studio: 6.7 months Leonardozylberberg Architect: 37.8 months Mbh: 10.2 months Interstice Architects: 9.4 months Nastaran Mousavi: 11.5 months Angela Matt Architect, Inc.: 1.4 months Century Electric: 11.7 months James Gates Architectural Corp: 5.6 months Page & Turnboll: 5.1 months Marx | Okubo Associates Inc: 4.4 months Tk Architect: 7.2 months Leddy May Tun Stacy Arch.

10 firms with medians over 21 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 apartments and multifamily alone.

  1. 654 Gamble + Design 9
  2. 655 Gruen Association 9
  3. 656 Leddy May Tun Stacy Arch. 9
  4. 657 Lorin Hill, Architect 9
  5. 658 Mark & Clark Design 9

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

  1. 190 Leddy Maytum Architects 8
  2. 191 Axis Architectural 8
  3. 192 Leddy May Tun Stacy Arch. 8
  4. 193 Gglo Design 8
  5. 194 Bin Lei 7

Apartments and multifamily issued, 659 architects and designers Apartments and multifamily ranking

Where they work

The neighborhoods where Leddy May Tun Stacy Arch. files the most permits, and how many architects and designers count each one among their top 4 neighborhoods.

  1. 01 Mission 381 architects and designers count Mission among their busiest neighborhoods
  2. 02 Mission Bay 109 architects and designers count Mission Bay among their busiest neighborhoods
  3. 03 Hayes Valley 106 architects and designers count Hayes Valley among their busiest neighborhoods
  4. 04 Noe Valley 231 architects and designers count Noe Valley 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 apartments and multifamily

Firms ranked near Leddy May Tun Stacy Arch. by permits issued for apartments and multifamily.

  1. 189 Sgpa Arch & Planning 8 apartments and multifamily issued · 13.8 mo median for apartments and multifamily
  2. 190 Leddy Maytum Architects 8 apartments and multifamily issued · 22.4 mo median for apartments and multifamily
  3. 191 Axis Architectural 8 apartments and multifamily issued
  4. 193 Gglo Design 8 apartments and multifamily issued
  5. 194 Bin Lei 7 apartments and multifamily issued
  6. 195 Eta-Sf 7 apartments and multifamily issued

See all 659 architects and designers ranked for apartments and multifamily

Sheet
A-656 No. 656 of 1,543
Drawing
Permit record, Leddy May Tun Stacy Arch.
Architect, San Francisco
License
C12720 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 Leddy May Tun Stacy Arch. has not paid to be listed. Project addresses are never shown.

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