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519 Natoma St

South of Market, SF 94103 3726054 4 units · 2 fl · 1907

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 519 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 1907
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 built1907
Total area3,030 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3726054
Ownership

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

Owner name
Lefkos Byron Aftonomos 2010
Mailing address
Aftonomos Lefkos Byron,trus 1914 Lyon St San Francisco CA 94115
Last sale
043021

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.

519 B Natoma St, San Francisco, CA 94103
519 A Natoma St, San Francisco, CA 94103
519 C Natoma St, San Francisco, CA 94103
519 Natoma St, San Francisco, CA 94103
Augrented Insights
Initial analysis

The property at 519 Natoma Street is a two-story, four-unit multi-family residential building constructed in 1907 in San Francisco's South of Market neighborhood, currently owned by Byron Aftonomos Lefkos since 2010. The building underwent significant improvements in 2004, including a $150,000 renovation to upgrade the exit stair at the rear and infill the light wells, as well as a $60,000 project to replace kitchens and bathrooms in all four studio apartments while upgrading electrical and plumbing systems. A major electrical upgrade was completed in 2005, involving rewiring all four apartments with new lighting, switches, and receptacles. The building has had three notable fire safety-related incidents: a cooking fire (contained), a smoke scare, and one false alarm, with no civilian injuries reported in any of these events.

The property has undergone several safety inspections and renovations over its history, including addressing dry rot damage repairs to rear stairs in 1992. In 2004, multiple building violations were documented and subsequently abated, including issues with stairs, fire sprinklers, and gas shutoff tools. A routine safety inspection in 2008 and a health and safety inspection in 2011 resulted in additional requirements for fire safety improvements and security devices, all of which were eventually resolved. More recently, 2023-2024 records show various municipal service calls near the property, including reports of encampments, illegal parking, and street cleaning issues, though these are primarily external to the building itself. The most recent building-related permits show limited recent activity, with the most recent being a street space permit issued in 2018, suggesting stable conditions since the last major renovations.

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

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Risk rating

How 519 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
67th percentile

Out of 430 buildings in this neighborhood, 142 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 58.1%
Moderate concern 25.4%
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.
Apartment reviews

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The story over time

519 Natoma St event timeline

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

2025
311 Request Nov 02
Garbage and debris
human waste or urine
311 RequestOct 04
Encampment

See all 10 events

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

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Every record we have

Full data for 519 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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