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Engineer, Richmond License M31511

Bay City Mechanical Inc.

The city has issued 20 of the 20 San Francisco building permits that name Bay City Mechanical Inc. since 2018. The work is a mix of residential and commercial, led by offices. Their median plan-review permit, across all project types, took 11.0 months from filing to issue. Their busiest neighborhoods are Financial District/South Beach, South of Market and Potrero Hill.

Also filed as
architect, contractor
Issued by the city
20 of 20 filed since 2018
Median plan-review time, all types
11.0 mo filing to issue
Rank for offices
No. 84 of 375 by offices issued
Overall rank
No. 235 of 1,146 engineers

What they work on

Every San Francisco building permit with Bay City Mechanical Inc. on the record since 2018, by project type. Most filed: 10 offices, 7 apartments and multifamily, 2 retail and shops.

Residential and commercial, by permits filed

35% residential
65% commercial
Permits by project type, filed and issued
  1. Offices Commercial 10 of 10 issued 50% of filings.
  2. Apartments and multifamily Residential 7 of 7 issued 35% of filings.
  3. Retail and shops Commercial 2 of 2 issued 10% of filings.
  4. Hotels, clinics, schools and other commercial Commercial 1 of 1 issued 5% 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
9 permits filed
Latest filing
Oct 2026
100% of 20 issued
Permits filed per year: 2018: 5, 2019: 9, 2020: 0, 2021: 2, 2022: 1, 2023: 1, 2024: 0, 2025: 1, 2026: 1. The 2026 figure runs through October 20, 2026.

One building per year, its height the permits filed. Each floor line marks 2 permits; the 2026 building is dashed because it counts permits filed through October 20, 2026.

Issued by the city: 20 of 20 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. Bay City Mechanical 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.

Bay City Mechanical Inc., all project types

11.0months

Median months from filing to issue for plan-review permits. Bay City Mechanical Inc., all project types: 11.0 months. San Francisco, offices: 3.9 months. Middle half of city permits: 1.8 to 8.1 months.
41 other engineers ranked for offices have a median for it; Bay City Mechanical Inc. has fewer than 3 issued plan-review permits for offices with usable dates 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+ months Decker Electric: 3.6 months Ar&B, Inc.: 4.5 months Amit Wadhwa & Associates: 2.6 months Levi Abarte: 9.1 months A G E Consulting: 3.8 months Murphy Burr Curry Inc.: 3.5 months Glumac: 13.6 months Mhc Engineers: 8.4 months Rivera Consulting Group Inc: 3.5 months Randall Lamb Assoc: 6.6 months Allied Heating & Air Condition: 2.6 months Degenkolb Engineers: 2.5 months Acg Engineers Inc: 8.9 months Streamline Engineering: 6.8 months Alfatech: 2.9 months Pragmatic: 6.6 months Tipping Structural Engineers: 4.0 months Interlocity: 5.0 months Nabih Youssef Associats: 4.0 months Pae: 6.0 months Salas O'brien: 6.6 months Randall Lamb Engineers: 12.6 months Meyers+Engineers: 8.1 months Simpson Gumpertz & Heger: 9.5 months Zfa Structural Engineers: 11.7 months Kpff: 8.1 months Aj Miller And Associates: 3.3 months Gfds Engineers: 9.4 months Erwin O'toole: 4.7 months Sfdpw: 11.7 months Kris Johnson: 5.5 months Skidmoe Owings & Merrill: 4.6 months Bkf Engineers: 6.5 months Summit Engineering Inc: 7.5 months Mahmoud Maamouri: 3.7 months Edci Engineers: 9.4 months Cmt: 9.4 months Nexius Solutions Inc: 8.4 months Colebreit Engineeering: 9.4 months Arcadia Inc: 5.5 months Freyer And Laureta: 1.0 months 0 3 6 9 12+ months Decker Electric: 3.6 months Ar&B, Inc.: 4.5 months Amit Wadhwa & Associates: 2.6 months Levi Abarte: 9.1 months A G E Consulting: 3.8 months Murphy Burr Curry Inc.: 3.5 months Glumac: 13.6 months Mhc Engineers: 8.4 months Rivera Consulting Group Inc: 3.5 months Randall Lamb Assoc: 6.6 months Allied Heating & Air Condition: 2.6 months Degenkolb Engineers: 2.5 months Acg Engineers Inc: 8.9 months Streamline Engineering: 6.8 months Alfatech: 2.9 months Pragmatic: 6.6 months Tipping Structural Engineers: 4.0 months Interlocity: 5.0 months Nabih Youssef Associats: 4.0 months Pae: 6.0 months Salas O'brien: 6.6 months Randall Lamb Engineers: 12.6 months Meyers+Engineers: 8.1 months Simpson Gumpertz & Heger: 9.5 months Zfa Structural Engineers: 11.7 months Kpff: 8.1 months Aj Miller And Associates: 3.3 months Gfds Engineers: 9.4 months Erwin O'toole: 4.7 months Sfdpw: 11.7 months Kris Johnson: 5.5 months Skidmoe Owings & Merrill: 4.6 months Bkf Engineers: 6.5 months Summit Engineering Inc: 7.5 months Mahmoud Maamouri: 3.7 months Edci Engineers: 9.4 months Cmt: 9.4 months Nexius Solutions Inc: 8.4 months Colebreit Engineeering: 9.4 months Arcadia Inc: 5.5 months Freyer And Laureta: 1.0 months

2 firms with medians over 12 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. 233 Thornton Tomoasetti 20
  2. 234 Andy Tan 20
  3. 235 Bay City Mechanical Inc. 20
  4. 236 Mechanical Deisgn Studio 20
  5. 237 Southland Industries 20

All permits issued, 1,146 engineers Full ranking

  1. 82 Structural Designs 10
  2. 83 Tuan + Robison 10
  3. 84 Bay City Mechanical Inc. 10
  4. 85 Dpw 10
  5. 86 Universal Structural Engineers 10

Offices issued, 375 engineers

Where they work

The neighborhoods where Bay City Mechanical Inc. files the most permits, and how many engineers count each one among their top 4 neighborhoods.

  1. 01 Financial District/South Beach 386 engineers count Financial District/South Beach among their busiest neighborhoods
  2. 02 South of Market 204 engineers count South of Market among their busiest neighborhoods
  3. 03 Potrero Hill 93 engineers count Potrero Hill among their busiest neighborhoods
  4. 04 Chinatown 113 engineers count Chinatown 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 engineers for offices

Firms ranked near Bay City Mechanical Inc. by permits issued for offices.

  1. 79 Anderson & Rowe & Buckey 11 offices issued
  2. 81 Ftf Engineering Inc. 10 offices issued
  3. 83 Tuan + Robison 10 offices issued
  4. 85 Dpw 10 offices issued
  5. 87 Rosendin Electric, Inc. 10 offices issued
  6. 88 Litzenberger Engineering 10 offices issued
Sheet
S-235 No. 235 of 1,146
Drawing
Permit record, Bay City Mechanical Inc.
Engineer, Richmond
License
M31511 check with BPELSG
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 Bay City Mechanical Inc. has not paid to be listed. Project addresses are never shown.

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