Free SF apartment background check

3380 21St St

Eureka Valley/Dolores Heights, SF 94110 3608024 9 units · 3 fl · 1962

This building has far more open problems than almost any other in the neighborhood. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood
Compared to a typical building in Eureka Valley/Dolores Heights
Above average
avg 1.3
3
FewerMore

This building has 3 novs (7y), above the Eureka Valley/Dolores Heights average of 1.3.

Rent & eviction protection

Is 3380 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 1962
2 or more units
9 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
Units9
Floors3
Year built1962
Total area8,562 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3608024
Ownership

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

Owner name
T&A Drolapas & Sons Lp
Mailing address
611 Santa Florita Ave Millbrae CA 94030
Last sale
050302

Landlord portfolio

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

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Augrented Insights
Initial analysis

The 9-unit, 3-story multi-family residential building at 3380 21st Street, owned by T&a Drolapas & Sons LP, was constructed in 1962 and has undergone several significant improvements and faced various challenges over its history. Most notably, the building completed its mandatory soft-story retrofit in 2017 (at a cost of $78,400), achieving Tier 3 compliance with San Francisco's seismic safety requirements. The building has experienced recurrent fire safety issues, with multiple fire escape violations and alarm system problems documented between 2009 and 2023, though all were marked as "Condition Corrected" upon follow-up inspections. A 2023 routine inspection noted only the need for a Section 604 compliance affidavit, which was subsequently submitted.

Historical complaints from 1997-1999 revealed various maintenance issues including water leaks, heating problems, mold, and common area concerns, though most were addressed promptly. The building underwent significant infrastructure improvements, including underground electrical service conversion to 300A with 10 meters in 2004, though earlier permits from 1997-2001 (for roofing and siding work) had expired. Recent external matters include recurring parking issues with vehicles blocking driveways (2022-2024) and various maintenance requests to the city for street and tree maintenance, indicating ongoing property management challenges. While the building has experienced numerous violations and complaints over its history, most recent inspections suggest improved compliance with housing codes and safety requirements, though periodic safety-related issues continue to arise.

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

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Risk rating

How 3380 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
8th percentile

Out of 1278 buildings in this neighborhood, 1176 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.

DBI tenant complaints (past 7 years)

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

12-Month severity forecast
No violation 15.7%
Moderate concern 25.6%
Severe concern 58.7%
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

3380 21St St event timeline

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

2026
Fire Complaint Apr 24
Sprinkler/Standpipe Systems
No Merit

See all 12 events

Full history back to 2022 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 3380 21St 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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