Free SF apartment background check

400 Fell St

Hayes Valley, SF 94102 0818040 2 units · 2 fl · 1979

This building has a higher-than-average number of open problems nearby. Few open issues; problems get fixed quickly. A reasonable bet for a smooth tenancy.

NOVs (7y) vs. neighborhood
Compared to a typical building in Hayes Valley
At or below average
avg 2.3
0
FewerMore

This building has 0 novs (7y), at or below the Hayes Valley average of 2.3.

Rent & eviction protection

Is 400 Fell 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 1979
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RH3
Not rent-controlled. Buildings constructed after 1978 are generally exempt from SF rent increase limits under the Costa-Hawkins Act.

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

Building characteristics
Units2
Floors2
Year built1979
Total area3,180 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0818040
Ownership

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

Owner name
Wymiarkiewicz Slawomir
Mailing address
1817 California St Apt 108 San Francisco CA 94109
Last sale
071404

Landlord portfolio

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

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Augrented Insights
Initial analysis

The two-unit residential building at 400 Fell Street in Hayes Valley, owned by Wymiarkiewicz Slawomir, was constructed in 1979 and is classified as a Flats & Duplex structure with two stories. The building's maintenance history includes several significant events, with the most recent being a fire code violation issued in May 2023 regarding fire extinguisher service requirements, which was subsequently abated. In 2007, the property faced multiple fire safety violations related to combustible storage materials and improper garbage receptacle placement in the parking garage, though these were resolved by August of the same year. Earlier renovation work includes a completed 2000 project that added a bathroom and exercise room with a wet bar in the basement, while several permits from the 1980s were either cancelled or expired regarding wall and cabinet removal.

The building has undergone routine safety inspections by Housing Inspection Services in 2000, 2007, 2011, and 2018, with no significant issues recorded in the most recent inspection. More recently, in early January 2025, there have been multiple reports of garbage and debris issues near the property, including overflowing city garbage cans and instances of graffiti on public fixtures, though most of these cases have been resolved. The fire incident records show primarily minor issues, including outside rubbish fires, though one was noted as undetermined after investigation, and there were two alarm system malfunctions recorded. The property has maintained active compliance with most regulatory requirements, with regular inspections and prompt resolution of violations, though the recent concentration of sanitation issues reported through 311 calls in early 2025 may indicate emerging maintenance concerns in the vicinity.

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

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Risk rating

How 400 Fell 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
81th percentile

Out of 1027 buildings in this neighborhood, 195 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
84%
No DBI
violation
16%
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.

Neighborhood (ZIP code)

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

Construction spend, owner's portfolio

Estimated permit value across all of this owner's buildings.

DBI complaint rate, owner's portfolio

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

12-Month severity forecast
No violation 67.8%
Moderate concern 15.7%
Severe concern 16.5%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
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The story over time

400 Fell St event timeline

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

2026
311 Request May 31
Park patrol
park rules violation
311 RequestMay 31
Homelessness and supportive housing

See all 5 events

Full history back to 2026 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 400 Fell St apartments

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

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