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531-533 Natoma St

South of Market, SF 94103 3726050 4 units · 2 fl · 1908

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 South of Market
At or below average
avg 3.3
0
FewerMore

This building has 0 novs (7y), at or below the South of Market average of 3.3.

Rent & eviction protection

Is 531-533 Natoma 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 1908
2 or more units
4 units
Property type
Multi-Family Residential
Zoning
RED
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
Units4
Floors2
Year built1908
Total area3,050 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3726050
Ownership

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

Owner name
Zarboulas Philip & Lei Yang
Mailing address
1570 Seneca Ln San Mateo CA 94402
Last sale
062018

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.

533 Natoma St, San Francisco, CA 94103
531 Natoma St, San Francisco, CA 94103
Augrented Insights
Initial analysis

The two-story, four-unit multi-family residential building at 531-533 Natoma Street in San Francisco's South of Market neighborhood has a recorded history of maintenance and safety compliance efforts dating back to 1991. Recent activity includes the issuance of a plumbing permit in March 2024 for the replacement of a 40-gallon gas water heater. The building has undergone several significant structural and safety-related improvements over the years, including stair repairs and replacements in 1993 (with associated handrail work), reroofing in 1991, and multiple health and safety inspections by Housing Inspection Services in 2004, 2008, and 2012. A notable cluster of building violations was recorded in January 2004, addressing stair safety issues including handrail and guardrail requirements, gas utility shutoff tool requirements, and security concerns, all of which were abated by February 2004.

The property has experienced recurring fire safety system inspections and issues, with the most recent fire complaint in September 2023 regarding sprinkler/standpipe systems (which was corrected promptly), and multiple fire system-related complaints in 2022 including concerns about alarms and extinguishers that were also corrected. Historical fire violations from June 2017 regarding sprinkler and extinguisher requirements were eventually abated. The building underwent a significant routine safety inspection in 2008 that identified various compliance issues, and more recent inspections have continued to monitor fire safety systems. The surrounding area has generated multiple 311 calls in recent months (2024-2025), primarily related to garbage and debris on public areas near the building, though these external issues do not directly reflect on the building's internal conditions or management.

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

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Risk rating

How 531-533 Natoma 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
69th percentile

Out of 430 buildings in this neighborhood, 133 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
79%
No DBI
violation
21%
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.

Neighborhood (ZIP code)

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

Building age

Older buildings tend to have more maintenance challenges; SF's pre-1906 earthquake housing stock carries distinct risk.

12-Month severity forecast
No violation 57.9%
Moderate concern 25.4%
Severe concern 16.8%
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

531-533 Natoma St event timeline

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

2025
Fire Incident Nov 20 Serious
500 Service Call, other
Injuries: 0 · Fatalities: 0
311 RequestOct 08
Garbage and debris

See all 8 events

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

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Every record we have

Full data for 531-533 Natoma 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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