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520-522 Fillmore St

Hayes Valley, SF 94117 0828019 3 units · 2 fl · 1900

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 520-522 Fillmore 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
3 units
Property type
Multi-Family Residential
Zoning
RM1
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
Units3
Floors2
Year built1900
Total area4,026 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0828019
Ownership

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

Owner name
Mcmath Alexander S
Mailing address
522 Fillmore St San Francisco CA 94117
Last sale
120197

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.

520 Fillmore St, San Francisco, CA 94117
522 Fillmore St, San Francisco, CA 94117
Augrented Insights
Initial analysis

The three-unit residential building at 520-522 Fillmore Street in Hayes Valley, owned by Alexander S. Mcmath, is a two-story flats and duplex structure built in 1900. The building's maintenance record shows several significant improvements over the years, including reroofing projects in 1991 and 1997, and bathroom renovations in 1993. A horizontal addition was completed in 1987, demonstrating the property's historical development. The building underwent routine safety inspections in 2000, 2008, and 2010, with the 2008 inspection revealing multiple violations related to security and fire safety, including requirements for deadlatch locks, fire extinguishers, self-closing doors, and address identification - all of which were abated by February 2008. A structural issue with the wood stairs was identified and resolved in 2010.

More recent concerns include three fire code violations between 2019-2022 for issues related to permits, change of use, and non-conforming hardware, all of which were subsequently abated. The property has experienced multiple false alarms and system malfunctions, with six recorded fire incidents since 2010, though none resulted in civilian injuries. Recent activity at the property includes several 311 calls from 2023-2025 primarily related to sidewalk parking violations and street cleaning needs, with the most recent being for garbage and debris in January 2025. A notable fire complaint regarding overcrowding and operating without a permit was filed in May 2021, with violations issued and closed in February 2022.

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

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Risk rating

How 520-522 Fillmore 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
33th percentile

Out of 1027 buildings in this neighborhood, 688 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.

Building size

Total floor area — a proxy for building scale and the number of systems (plumbing, electrical, HVAC) that can fail.

Building age

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

Estimated permit spend (past 7 years)

Dollar value of permits pulled at this address — large recent spend can signal deferred-maintenance catch-up.

12-Month severity forecast
No violation 48.4%
Moderate concern 19.2%
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

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The story over time

520-522 Fillmore St event timeline

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

2026
DBI Complaint Feb 20
Customer is reporting that this building does not have a gutter on their roof. due to this, rain water drains into breezeway next door, leaving 3 to 4 inches of standing water, and has damaged the foundation of their building. customer is willing to provide access into their property for inspection.
Housing Inspection Services

See all 1 events

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

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Every record we have

Full data for 520-522 Fillmore 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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