Permit Record

Alteration Residential

1831 20th Av, San Francisco, Ca, 94122

Classificationotc alterations permitResidential Alteration
Reliable value$7,100
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)
1
Units (commercial)
Not in source
Floor area
Not in source
Parcel & enrichment
Parcel APN
2057 007
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
1 family dwelling
Geocode & dates
Coordinates
37.7536, -122.4778
Geocode confidence
95%
Geocode source
Not in source
Issued
Aug 14, 2012
Applied
Aug 14, 2012
Work class
Residential
Description
Source description

reroofing

Status
Current status
issued
Source status
issued
Provenance
First seen by PermitCore
May 2, 2026 · 23:50 UTC
Last seen
May 11, 2026 · 23:59 UTC
Last changed
May 2, 2026 · 23:50 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

4 permits at this parcel (parcel 2057 007) · through Aug 14, 2012

  1. Aug 14, 2012This permitAlteration Residential · Issued$7,100
  2. Date not usable in source474948123759Alteration Residential · Finaled$8,200
  3. Date not usable in source453313123759Alteration Residential · Finaled$10,300
  4. Date not usable in source442344123759Alteration Residential · Finaled$10,638

Full permit history at this parcel · as of Jul 9, 2026.

Developer details
Permit #
1279448123759
Canonical ID
6:1279448123759
Source permit ID
1279448123759
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