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3642-3644 20Th St

Mission Dolores, SF 94110 3597018 2 units · 2 fl · 1899

This building has more problems than most buildings in this neighborhood. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood
Compared to a typical building in Mission Dolores
At or below average
avg 2.9
0
FewerMore

This building has 0 novs (7y), at or below the Mission Dolores average of 2.9.

Rent & eviction protection

Is 3642-3644 20Th St rent-controlled?

San Francisco's Rent Ordinance caps rent increases and provides eviction protection for most residential units built before 1979 with 2+ units. Here's how this building scores.

Built before 1979
Built 1899
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RH3
Likely rent-controlled. Building age and unit count suggest this property falls under San Francisco's Rent Ordinance.

Based on SF Assessor records. Not legal advice — confirm with the SF Rent Board.

Building characteristics
Units2
Floors2
Year built1899
Total area1,880 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3597018
Ownership

Registered owner per SF Assessor-Recorder (secured roll).

Owner name
Silvers Steven J & Ryan E
Mailing address
3644 20th St San Francisco CA 94110
Last sale
082713

Landlord portfolio

Other SF properties this owner holds, with risk grades for each.

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Multiple entrances & addresses

Included addresses

All street addresses sharing this blocklot that are covered by this report.

3644 20th St, San Francisco, CA 94110
3642 20th St, San Francisco, CA 94110
Augrented Insights
Initial analysis

The two-unit residential building at 3642-3644 20th Street, owned by Steven J & Ryan E Silvers, is a two-story flats and duplex structure built in 1899. The property has experienced recurring maintenance issues, particularly with deck safety, as evidenced by multiple repairs to rotting wood in the rear deck occurring in 2012 and 2018, with the latter repair following a building complaint about unauthorized demolition of a multi-story deck and stairs. A significant concern remains as of February 2021, regarding a possible unpermitted rental unit in the uppermost floor/attic equipped with stove and sink, which is currently listed on Airbnb. The building's infrastructure has seen various improvements, including a heating system upgrade to a high-efficiency furnace in 2012, though this permit subsequently expired.

Recent inspections and permits indicate ongoing maintenance efforts, such as the installation of two direct vent gas inserts in 2020. The property has experienced several compliance issues, including a short-term rental violation that was ultimately closed as abated when the owner was instructed to cease rentals of less than 30 days. The building's historical records show regular maintenance work, including three separate roofing projects between 1996 and 2001, and a horizontal addition completed in 1991 costing $16,000. Recent complaints in early 2024 indicate safety concerns with uncovered wires and cables creating tripping hazards at the sidewalk, though the majority of recent 311 calls relate to parking enforcement issues and general cleaning matters. While the building has experienced various maintenance and compliance issues over the years, there have been no recorded fire incidents with civilian injuries, and most historical complaints appear to have been resolved through appropriate remediation.

AI-generated · may contain errors · check the source data tables below

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Risk rating

How 3642-3644 20Th St's risk score is calculated

We trained a model on 7 years of SF DBI inspection data — notice of violation filings, complaint history, and owner track records. It estimates the probability that DBI inspectors will issue a Notice of Violation at this address in the next 12 months. Lower % = safer.

What the score means for you

Grade A–B — Low risk

DBI rarely finds violations here. Strong maintenance history and a clean complaint record.

Grade C — Moderate risk

Some past violations or complaints on record. Worth asking the landlord about any open issues before signing.

Grade D–F — High risk

Elevated violation and complaint history. DBI has found issues here before and is statistically likely to again.

Neighborhood percentile
23th percentile

Out of 799 buildings in this neighborhood, 615 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
47%
No DBI
violation
53%
DBI violation
likely
Model explanation

What's driving this score

The three data points that most influenced this building's risk rating — ranked by the weight the model placed on each one.

DBI tenant complaints (past 7 years)

Formal complaints tenants filed with DBI about this building over 7 years.

Permit rate, owner's portfolio

Per-building permit rate across the owner's portfolio.

Neighborhood (ZIP code)

The ZIP code captures local housing market and enforcement patterns that affect all buildings in the area.

12-Month severity forecast
No violation 46.8%
Moderate concern 40.7%
Severe concern 12.5%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

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The story over time

3642-3644 20Th St event timeline

Violations, complaints, fire incidents, permits, and buyouts — most recent records in order.

2024
311 Request Dec 23
Blocking driveway cite tow
Parking Enforcement

See all 4 events

Full history back to 2020 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 3642-3644 20Th St apartments

13 SF public datasets for this parcel — permits, violations, complaints, fire records, 311 calls, planning records, and buyouts.

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