Permit Record

Alteration Residential

1640 20th St, San Francisco, Ca, 94107

Classificationotc alterations permitResidential Alteration
Reliable value$600
ContractorNot in source
Permit record
Parties
Contractor
Not in source
Applicant
Not in source
Owner
Not in source
Architect
Not in source
Engineer
Not in source
Contractor license
Not in source
Building & lot · PLUTO
Building class
Not in source
Zoning district
Not in source
Lot area
Not in source
Year built
Not in source
Units (total)
Not in source
Units (residential)
2
Units (commercial)
Not in source
Floor area
Not in source
Parcel & enrichment
Parcel APN
4068 012
Climate zone (IECC)
3C
Roof area (est.)
Not derivable — no building-size signal for this permit
HVAC tonnage (est.)
Not derivable — no building-size signal for this permit
Building type
Not in source
Building subtype
2 family dwelling
Geocode & dates
Coordinates
37.7601, -122.3980
Geocode confidence
95%
Geocode source
Not in source
Issued
Not in source
Applied
Not in source
Work class
Residential
Description
Source description

renew app #9612126

Status
Current status
expired
Source status
expired
Provenance
First seen by PermitCore
May 2, 2026 · 23:54 UTC
Last seen
May 12, 2026 · 00:14 UTC
Last changed
May 12, 2026 · 00:14 UTC

Open in San Francisco source →

Data-quality checks0 of 12 flagged

0 of 12 data-quality rules flagged anything on this permit.

Checks not flagged

  • Geocode out of bounds
  • Geocode is sentinel
  • Issued date in the future
  • Issued date parse bug
  • Issued date is placeholder
  • Commercial units is placeholder
  • Residential units out of bounds
  • Residential units is placeholder
  • Total units out of bounds
  • Total units is placeholder
  • Valuation out of bounds
  • Valuation is placeholder
Project timeline at this parcel

19 permits at this parcel (parcel 4068 012) · through Jul 23, 2026

  1. Jul 23, 20261753784169452Alteration Residential · Issued$9,500
  2. Aug 23, 20241703049169452Alteration Residential · Finaled$23,185
  3. Sep 21, 20181524788169452Alteration Residential · Issued
  4. Sep 11, 20181523074169452Alteration Residential · Finaled$6,500
  5. Nov 6, 20091189794169452Alteration Residential · Finaled$18,000
  6. May 30, 20081137640169452Alteration Residential · Finaled$1,000
  7. Mar 7, 20081128243169452Alteration Residential · Finaled$4,500
  8. Oct 24, 20071113772169452Alteration Residential · Finaled
  9. Mar 29, 20071088165169452Alteration Residential · Expired$12,500
  10. Jan 23, 20071080875169452Alteration Residential · Issued
  11. Jan 23, 20071025643169452Alteration Residential · Finaled$96,000
  12. Jun 20, 20051019588169452Alteration Residential · Finaled$50
  13. Apr 6, 20051011557169452Alteration Residential · Finaled$18,500
  14. Date not usable in sourceThis permitAlteration Residential · Expired$600
  15. Date not usable in source579728169452Alteration Residential · Finaled$60,000
  16. Date not usable in source547170169452Alteration Residential · Expired$4,875
  17. Date not usable in source513165169452Alteration Residential · Expired$9,000
  18. Date not usable in source94483169452Alteration Residential · Finaled$3,000
  19. Date not usable in source94164169452Alteration Residential · Finaled$450

Full permit history at this parcel · as of Jul 26, 2026.

Developer details
Permit #
649501169452
Canonical ID
6:649501169452
Source permit ID
649501169452
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