Free SF apartment background check

3700 20Th St

Mission Dolores, SF 94110 3598009 25 units · 3 fl · 1925

This building has significantly more problems than most nearby buildings. 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
Above average
avg 2.9
8
FewerMore

This building has 8 novs (7y), above the Mission Dolores average of 2.9.

Rent & eviction protection

Is 3700 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 1925
2 or more units
25 units
Property type
Multi-Family Residential
Zoning
RM2
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
Units25
Floors3
Year built1925
Total area15,369 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3598009
Ownership

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

Owner name
Theodore Anstedt/Suzanne Ol
Mailing address
Theodore R Anstedt Jr & Suz 105 Roblar Ave Hillsborough CA 94010
Last sale
052319

Landlord portfolio

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

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Augrented Insights
Initial analysis

The 3700 20th Street building, a 25-unit multi-family residential structure constructed in 1925, has undergone significant improvements over recent years, particularly in terms of safety and modernization. Most notably, recent fire safety upgrades include a comprehensive fire alarm system replacement completed in February 2024, with new equipment throughout the building. This followed earlier partial sprinkler system installations, including work in 2018 and 2023, with recent violations related to fire safety requirements now abated. The building successfully completed its mandatory soft-story retrofit in 2016, demonstrating compliance with seismic safety requirements.

Recent maintenance and improvement work has focused on individual units, with several undergoing substantial renovations, including Units 30 and 31 in 2019, and the addition of an accessory dwelling unit (ADU) in 2017. Building systems have received attention through various electrical and plumbing upgrades, including a significant electrical panel upgrade in 2004 and more recent improvements to common areas. The property has experienced occasional compliance issues, as evidenced by building violations and complaints in 2023 regarding fire safety, handrails, and garbage storage, though these have generally been promptly addressed. Historical records show some concerns about unauthorized construction work in 2017, but this appears to have been resolved. The building's recent maintenance record, including multiple 311 calls for debris removal in late 2024, suggests ongoing property management activity, though these calls relate to external rather than internal building conditions.

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

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Risk rating

How 3700 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
16th percentile

Out of 799 buildings in this neighborhood, 671 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
36%
No DBI
violation
64%
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.

Number of units

The number of units affects how the model reads complaint and violation totals — more units means more potential sources.

Building size

Total floor area — a proxy for building scale and the number of systems (plumbing, electrical, HVAC) that can fail.

NOV rate, owner's portfolio

Per-building NOV rate across everything this owner manages — high rates signal pattern neglect.

12-Month severity forecast
No violation 28.7%
Moderate concern 46.2%
Severe concern 25.1%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

3700 20Th St apartment reviews

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The story over time

3700 20Th St event timeline

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

2026
311 Request May 28
Homelessness and supportive housing
housing homeless request for service
311 RequestMay 27
Not offensive

See all 20 events

Full history back to 2019 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 3700 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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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

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