Free SF apartment background check

3374-3376 21St St

Eureka Valley/Dolores Heights, SF 94110 3608023 4 units · 2 fl · 1900

This building has more problems than most buildings in this neighborhood. Few open issues; problems get fixed quickly. A reasonable bet for a smooth tenancy.

NOVs (7y) vs. neighborhood
Compared to a typical building in Eureka Valley/Dolores Heights
At or below average
avg 1.3
0
FewerMore

This building has 0 novs (7y), at or below the Eureka Valley/Dolores Heights average of 1.3.

Rent & eviction protection

Is 3374-3376 21St 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 1900
2 or more units
4 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.

Statewide backstop · AB 1482

California Tenant Protection Act of 2019

Even when a building isn't covered by local rent stabilization, the statewide Tenant Protection Act (AB 1482) may still apply. It caps annual rent increases and requires the landlord to state a legal reason to end most tenancies.

15+ years since occupancy
Built 1900
Annual rent increase cap
5% + CPI, max 10%
Just-cause eviction
After 12 months
Local rent control likely takes priority. This building appears to fall under the local ordinance above, which is stronger than AB 1482. Where a local just-cause ordinance applies, its rules govern instead of the state cap.

AB 1482 does not apply to single-family homes and condos unless owned by a corporation, REIT, or an LLC with a corporate member; to owner-occupied duplexes; or to deed-restricted affordable housing. The Act is in effect until January 1, 2030. Not legal advice — see the California landlord–tenant guide.

Building characteristics
Units4
Floors2
Year built1900
Total area3,910 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3608023
Ownership

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

Mailing address
Steven C. Thrower & Au Yat- 1 Bush St Ste 900 San Francisco CA 94104
Last sale
092518

Landlord portfolio

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

Unlock complete report
Multiple entrances & addresses

Included addresses

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

3374 21st St, San Francisco, CA 94110
3376 21st St, San Francisco, CA 94110
Augrented Insights
Initial analysis

The property at 3374-3376 21st Street is a two-story, four-unit multi-family residential building constructed in 1900, currently owned by 3374-3376 21st Street LLC. The building has undergone several significant renovation attempts over the past decade, with the most recent work occurring between 2015-2016 including a proposed addition of an accessory dwelling unit (ADU) at the ground floor, voluntary seismic upgrades including shear wall installation, and a comprehensive remodel of unit C involving kitchen and bathroom relocations. However, there have been multiple concerning issues with the renovation process, most notably a current active complaint from January 2021 regarding derelict and empty ground floor conditions, claimed expired permits, and alleged structural problems. This was preceded by three consecutive sewer backup incidents in September 2014, multiple violations in 2002 relating to various building maintenance issues including water damage, inoperable windows, and security concerns, and several permit expirations from 2015-2016 including a seismic upgrade permit valued at $80,000.

The building's systems have seen some maintenance and upgrades over the years, including a sewer repair in 2012, electrical system conversion to underground service in 2004, and various repairs to address building code violations such as damaged paint, plumbing issues, and safety concerns. Recent external maintenance issues have been documented through 311 calls, including reports of damaged trees (2022) and sidewalk cleaning needs (2024). While some historical issues have been resolved, as evidenced by completed permits and inspection records, the most recent complaints regarding the ground floor's condition and possible unauthorized work remain active concerns requiring attention.

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

Free account unlocks the full analysis — plus 2× more records across all data categories and the complete landlord portfolio.
Risk rating

How 3374-3376 21St 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
21th percentile

Out of 1278 buildings in this neighborhood, 1010 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
56%
No DBI
violation
44%
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.

DBI tenant complaints (past 7 years)

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

Neighborhood location

Precise location is a proxy for neighborhood-level risk — some SF blocks have systematically higher DBI activity.

12-Month severity forecast
No violation 37.3%
Moderate concern 30.2%
Severe concern 32.5%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

3374-3376 21St St apartment reviews

Real experiences from people who have lived here. Share yours to help other renters decide.

Share your experience — Help other renters by leaving an honest apartment review

Loading reviews…

On the map

Compare nearby alternatives

This building and nearby alternatives, color-coded by risk level. Click any marker to explore.

The story over time

3374-3376 21St St event timeline

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

2025
Plumbing Permit Oct 28
Work category: 1p; new heat pump water heater
Complete
Electrical PermitOct 28
Install new 120-volt, 20-amp gfci for water heater

See all 4 events

Full history back to 2021 — violations, complaints, permits, buyouts, and fire incidents.

Unlock complete timeline
Every record we have

Full data for 3374-3376 21St St apartments

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

Still apartment hunting in SF?

Look up the next apartment before you sign

Search any SF address free — no account needed to see the risk rating.

Simple pricing

Get the complete picture

Every plan unlocks the complete report: all 13 SF datasets, full history, landlord portfolio, and PDF & Excel exports.

Report Bundle

For the buildings you're deciding on right now

$10 one-time

~$3.33 per building. No subscription ever. Each credit unlocks one building's premium report for 30 days.

  • 3 full AI-powered reports
  • Download PDF reports
  • Advanced safety analysis
  • Compare multiple buildings
  • Credits never expire until you use them
  • Full public records (200 rows per dataset)
Buy 3 Reports — $10

Apartment Hunter

For a wide search across many buildings

$39 one-time

30 reports — ~$1.30 each. No subscription ever.

  • 30 full AI-powered reports
  • Download PDF reports
  • Advanced safety analysis
  • Compare multiple buildings
  • Credits never expire until you use them
  • Full public records (200 rows per dataset)
Buy 30 Reports — $39

Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

Watch 3374-3376 21St St
Get alerted the moment a new violation or complaint is filed.