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Engineer, Daly City License C70119

Andy Tan

The city has issued 55 of the 58 San Francisco building permits that name Andy Tan since 2018. The work is mostly residential, led by home remodels. Their busiest neighborhoods are Sunset/Parkside, Oceanview/Merced/Ingleside and West of Twin Peaks.

Also filed as
architect, designer
Issued by the city
55 of 58 filed since 2018
Rank for home remodels
No. 49 of 491 by home remodels issued
Overall rank
No. 102 of 1,146 engineers
Commercial share
0% last filing May 2026

What they work on

Every San Francisco building permit with Andy Tan on the record since 2018, by project type. Most filed: 52 home remodels, 5 apartments and multifamily, 1 ADUs.

Residential and commercial, by permits filed

100% residential
Permits by project type, filed and issued
  1. Home remodels Residential 50 of 52 issued 90% of filings.
  2. Apartments and multifamily Residential 4 of 5 issued 9% of filings.
  3. ADUs Residential 1 of 1 issued 2% 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
12 permits filed
Latest filing
May 2026
95% of 58 issued
Permits filed per year: 2018: 5, 2019: 12, 2020: 7, 2021: 5, 2022: 4, 2023: 7, 2024: 12, 2025: 5, 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: 55 of 58 permits filed

95%

All San Francisco project permits since 2018 in this data

93% issued

3 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. Andy Tan has 1 of those across all project types; the citywide comparison is for home remodels, their most filed type, where 3,361 of 93,498 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, home remodels: 8.9 months. Middle half of city permits: 5.0 to 15.6 months.
94 other engineers ranked for home remodels have a median for it Each circle is a firm's median for its plan-review permits for home remodels. Dashed line: the median of all San Francisco plan-review permits for home remodels, 8.9 months. Shaded: the middle half of those permits, 5.0 to 15.6 months.
0 3 6 9 12 15 18+ months Ecr Engineering: 13.8 months Double D Engineering: 9.8 months Hom & Pisano Engineering Inc.: 6.8 months Enertia Designs: 9.8 months Lawrence Liao Str. Eng: 6.5 months Atrium Structural Engineer: 5.8 months Ice Design Inc.: 11.0 months Kevin O'connor Inc.: 6.7 months Altos Engineering: 14.8 months Innovative Const: 15.5 months Rs Engineering: 14.1 months Design Everest Consulting: 8.1 months Semco Engineering Inc.: 6.8 months Base Design: 8.6 months Jingbo Yang: 7.8 months Design Consultants Group, Inc: 11.1 months Zfa Structural Engineers: 7.1 months Doug Lee: 9.0 months One Design: 12.6 months Yuflux Engineering Llc.: 8.3 months Horn Lee: 8.2 months Erwin O'toole: 5.3 months Ftf Engineering Inc.: 6.9 months Inncon Design: 18.0 months Mercury Engineering Group: 18.5 months Ashley & Vance Engineering: 6.7 months Dwong Engineering Inc.: 10.9 months Himmati Engineering Inc.: 6.0 months Strandberg Engineering: 9.0 months Holmes Culley: 5.8 months Sia Consulting Corp: 15.9 months Ny Engineering Consulting: 9.4 months William Liang: 3.7 months Gfds Engineers: 5.7 months Q Architecture: 14.7 months L Wong Engineering: 8.8 months Framework Engineering: 6.3 months A & J Design Associates Inc.: 6.9 months Gregory Paul Wallace Struct: 14.0 months Massoudi Consulting Engineer: 8.4 months Ca Voong: 6.4 months Hcg Associates, Inc.: 9.0 months Mosswood Engineering: 11.1 months Puns And Assoc: 10.3 months Jian Huang: 9.2 months Az Design & Engineering Inc: 16.0 months Wmstructural: 8.4 months Julia Y. Chen Design Inc.: 18.1 months Bkg Structural Engineers: 4.2 months Pat Buscovich: 7.4 months Michael Metiu Design Studio: 6.2 months Harrell Kane S.E. Inc.: 10.0 months David Yadegar, Pe: 5.0 months Thomas Podesta Engineer: 10.9 months Exforma Design: 11.4 months Lx Engineering: 8.8 months Jon Brody Structural Engineers: 6.8 months Dolmen Structural Engineer: 4.8 months Duane Tran: 8.6 months Ekw Engineering: 9.7 months Tsa Structural Engineers: 12.5 months Integrand Structural Engineer: 10.3 months Kris Johnson: 5.2 months Meece Engineering Inc.: 7.3 months Eas Designers: 4.4 months Benjamin Lai & Associates: 13.7 months Halterman Engineering: 3.1 months Ma Engineering: 8.9 months Patrick Donato: 9.4 months Murphy Burr Curry Inc.: 6.2 months W.H. Consultant Inc.: 7.0 months Ladc Engineering Inc: 4.9 months Bahman Ghassenmzadeh: 11.9 months Duquette Engineering: 8.5 months Seri Ngerwattana, Pe: 7.4 months Smithworks Engineering: 7.6 months Holmes: 4.5 months Tangobuilder: 7.1 months Hahbach-Lewin Inc: 10.8 months Lea & Braze Engineering, Inc: 5.3 months Powell And Associates: 5.9 months Double D Enginneering, Inc: 13.6 months W.H.Yang Structural Engr: 9.2 months St Onge & Assoc.: 7.1 months Pivot: 15.6 months Townsend Brown: 15.6 months Monterey Energy Group: 5.4 months Emc2 Structural Design Inc.: 15.3 months Qi Structural Engineering: 10.6 months Spi Consulting Engineers, Inc.: 4.0 months Prostruct Engineering: 20.8 months Dago De La Rosa: 7.2 months Engineering 350: 6.2 months Romig Engineers: 1.9 months 0 3 6 9 12 15 18+ months Ecr Engineering: 13.8 months Double D Engineering: 9.8 months Hom & Pisano Engineering Inc.: 6.8 months Enertia Designs: 9.8 months Lawrence Liao Str. Eng: 6.5 months Atrium Structural Engineer: 5.8 months Ice Design Inc.: 11.0 months Kevin O'connor Inc.: 6.7 months Altos Engineering: 14.8 months Innovative Const: 15.5 months Rs Engineering: 14.1 months Design Everest Consulting: 8.1 months Semco Engineering Inc.: 6.8 months Base Design: 8.6 months Jingbo Yang: 7.8 months Design Consultants Group, Inc: 11.1 months Zfa Structural Engineers: 7.1 months Doug Lee: 9.0 months One Design: 12.6 months Yuflux Engineering Llc.: 8.3 months Horn Lee: 8.2 months Erwin O'toole: 5.3 months Ftf Engineering Inc.: 6.9 months Inncon Design: 18.0 months Mercury Engineering Group: 18.5 months Ashley & Vance Engineering: 6.7 months Dwong Engineering Inc.: 10.9 months Himmati Engineering Inc.: 6.0 months Strandberg Engineering: 9.0 months Holmes Culley: 5.8 months Sia Consulting Corp: 15.9 months Ny Engineering Consulting: 9.4 months William Liang: 3.7 months Gfds Engineers: 5.7 months Q Architecture: 14.7 months L Wong Engineering: 8.8 months Framework Engineering: 6.3 months A & J Design Associates Inc.: 6.9 months Gregory Paul Wallace Struct: 14.0 months Massoudi Consulting Engineer: 8.4 months Ca Voong: 6.4 months Hcg Associates, Inc.: 9.0 months Mosswood Engineering: 11.1 months Puns And Assoc: 10.3 months Jian Huang: 9.2 months Az Design & Engineering Inc: 16.0 months Wmstructural: 8.4 months Julia Y. Chen Design Inc.: 18.1 months Bkg Structural Engineers: 4.2 months Pat Buscovich: 7.4 months Michael Metiu Design Studio: 6.2 months Harrell Kane S.E. Inc.: 10.0 months David Yadegar, Pe: 5.0 months Thomas Podesta Engineer: 10.9 months Exforma Design: 11.4 months Lx Engineering: 8.8 months Jon Brody Structural Engineers: 6.8 months Dolmen Structural Engineer: 4.8 months Duane Tran: 8.6 months Ekw Engineering: 9.7 months Tsa Structural Engineers: 12.5 months Integrand Structural Engineer: 10.3 months Kris Johnson: 5.2 months Meece Engineering Inc.: 7.3 months Eas Designers: 4.4 months Benjamin Lai & Associates: 13.7 months Halterman Engineering: 3.1 months Ma Engineering: 8.9 months Patrick Donato: 9.4 months Murphy Burr Curry Inc.: 6.2 months W.H. Consultant Inc.: 7.0 months Ladc Engineering Inc: 4.9 months Bahman Ghassenmzadeh: 11.9 months Duquette Engineering: 8.5 months Seri Ngerwattana, Pe: 7.4 months Smithworks Engineering: 7.6 months Holmes: 4.5 months Tangobuilder: 7.1 months Hahbach-Lewin Inc: 10.8 months Lea & Braze Engineering, Inc: 5.3 months Powell And Associates: 5.9 months Double D Enginneering, Inc: 13.6 months W.H.Yang Structural Engr: 9.2 months St Onge & Assoc.: 7.1 months Pivot: 15.6 months Townsend Brown: 15.6 months Monterey Energy Group: 5.4 months Emc2 Structural Design Inc.: 15.3 months Qi Structural Engineering: 10.6 months Spi Consulting Engineers, Inc.: 4.0 months Prostruct Engineering: 20.8 months Dago De La Rosa: 7.2 months Engineering 350: 6.2 months Romig Engineers: 1.9 months

4 firms with medians over 18 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 home remodels alone.

  1. 100 Dolmen Structural Engineer 56
  2. 101 J5 Infrastructure 55
  3. 102 Andy Tan 55
  4. 103 Wsp 55
  5. 104 C & N Engineers, Inc. 55

All permits issued, 1,146 engineers Full ranking

  1. 47 Mosswood Engineering 53
  2. 48 Ca H. Voong, Pe 52
  3. 49 Andy Tan 50
  4. 50 Puns And Assoc 49
  5. 51 Jian Huang 47

Home remodels issued, 491 engineers

Where they work

The neighborhoods where Andy Tan files the most permits, and how many engineers count each one among their top 4 neighborhoods.

  1. 01 Sunset/Parkside 220 engineers count Sunset/Parkside among their busiest neighborhoods
  2. 02 Oceanview/Merced/Ingleside 48 engineers count Oceanview/Merced/Ingleside among their busiest neighborhoods
  3. 03 West of Twin Peaks 234 engineers count West of Twin Peaks among their busiest neighborhoods
  4. 04 Excelsior 74 engineers count Excelsior 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 home remodels

Firms ranked near Andy Tan by permits issued for home remodels.

  1. 46 Monte Stott & Assoc Inc 54 home remodels issued
  2. 47 Mosswood Engineering 53 home remodels issued · 11.1 mo median for home remodels
  3. 48 Ca H. Voong, Pe 52 home remodels issued
  4. 50 Puns And Assoc 49 home remodels issued · 10.3 mo median for home remodels
  5. 51 Jian Huang 47 home remodels issued · 9.2 mo median for home remodels
  6. 52 Az Design & Engineering Inc 45 home remodels issued · 16.0 mo median for home remodels
Sheet
S-102 No. 102 of 1,146
Drawing
Permit record, Andy Tan
Engineer, Daly City
License
C70119 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 Andy Tan has not paid to be listed. Project addresses are never shown.

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