Permit Record

Alteration Residential

4001 20th St, San Francisco, Ca, 94114

Classificationotc alterations permitResidential Alteration
Reliable valueNot in source
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
3604 001
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
37.7578, -122.4305
Geocode confidence
95%
Geocode source
Not in source
Issued
Apr 12, 2012
Applied
Apr 10, 2012
Work class
Residential
Description
Source description

revision to premit #2009-1014-8947 revise structural framing remove glass floor @ lr and mstr br add hot tub at front yard. (n) access door to crawl to space @ stairway.

Status
Current status
finaled
Source status
complete
Finaled
May 17, 2012
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 checks1 of 12 flagged

1 of 12 data-quality checks flagged on this permit. Detail below.

Valuation is placeholder
valuation_usd_is_placeholder

valuation_usd matched a known placeholder (often 0 or 1) used by the source when the real valuation wasn't reported.

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
Project timeline at this parcel

5 permits at this parcel (parcel 3604 001) · Mar 26, 2010 – Apr 12, 2012

  1. Apr 12, 2012This permitAlteration Residential · Finaled
  2. Sep 20, 20111249387470863Alteration Residential · Finaled
  3. Jan 10, 20111225875470863Alteration Residential · Finaled
  4. Oct 26, 20101221805470863Alteration Residential · Issued
  5. Mar 26, 20101191074470863New Construction Residential Sf · Finaled$600,000

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

Developer details
Permit #
1267295470863
Canonical ID
6:1267295470863
Source permit ID
1267295470863
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