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523-525 43Rd Ave

Outer Richmond, SF 94121 1501003 2 units · 2 fl · 1946

Nothing on record for this building in the last seven years, and our model puts it at a low risk of maintenance problems over the next 12 months. No public enforcement record to go on. Walk the building, ask the current tenants how repairs get handled, and get any promises in writing.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Outer Richmond — not a forecast
At or below average
avg 0.7
0
FewerMore

This building has 0 novs (7y), at or below the Outer Richmond average of 0.7.

Rent & eviction protection

Is 523-525 43Rd Ave 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 1946
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RH2
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.

Statewide backstop · AB 1482

California Tenant Protection Act of 2019

Even when a building isn't covered by local rent stabilization, the statewide Tenant Protection Act (AB 1482) may still apply. It caps annual rent increases and requires the landlord to state a legal reason to end most tenancies.

15+ years since occupancy
Built 1946
Annual rent increase cap
5% + CPI, max 10%
Just-cause eviction
After 12 months
Local rent control likely takes priority. This building appears to fall under the local ordinance above, which is stronger than AB 1482. Where a local just-cause ordinance applies, its rules govern instead of the state cap.

AB 1482 does not apply to single-family homes and condos unless owned by a corporation, REIT, or an LLC with a corporate member; to owner-occupied duplexes; or to deed-restricted affordable housing. The Act is in effect until January 1, 2030. Not legal advice — see the California landlord–tenant guide.

Building characteristics
Units2
Floors2
Year built1946
Total area2,000 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1501003
Ownership

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

Mailing address
Joan A Frost, Trustee 74 Logan Lane Atherton CA 94027
Last sale
—

Landlord portfolio

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

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Multiple entrances & addresses

Included addresses

All street addresses sharing this blocklot that are covered by this report.

523 43rd Ave, San Francisco, CA 94121
525 43rd Ave, San Francisco, CA 94121
Augrented Insights
Initial analysis

The two-unit residential building at 523-525 43rd Avenue in San Francisco's Outer Richmond district was constructed in 1946 and is currently owned by the Joan A Frost Revocable Living Trust. The property underwent significant improvements in 2018, including a complete remodel of the upper unit's kitchen and bathroom, electrical system upgrades, and the installation of a new 200-amp electrical service with separate 100-amp feeds for each apartment. This substantial renovation work, valued at approximately $100,000, was prompted by an initial building complaint regarding unauthorized construction without permits in February 2018, which was subsequently addressed through proper permitting channels.

The building's maintenance history shows attention to infrastructure needs, including a cancelled 2019 window replacement project, and earlier work from 2002 involving a complete reroofing. More recent history includes two sewer-related incidents, with the most recent occurring in December 2021 involving a 4-inch sewer vent issue, and an earlier flooding incident in December 2010. The property has experienced minimal surface-level issues, with only four 311 calls recorded in the past decade, primarily related to parking concerns rather than building maintenance problems. The cancellation of several permits in 2018, including a window replacement project and certain electrical work, and the lack of documentation for a kitchen and bath remodel permit filed in 2018, while not directly indicating any safety concerns, suggest that not all proposed improvements were ultimately carried through as originally intended.

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

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Risk rating

How 523-525 43Rd Ave'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

Lower risk — safer than most nearby

DBI rarely finds violations here. Strong maintenance history and a clean complaint record.

Typical — about average for the neighborhood

Some past violations or complaints on record. Worth asking the landlord about any open issues before signing.

Higher risk — riskier than most nearby

Elevated violation and complaint history. DBI has found issues here before and is statistically likely to again.

Neighborhood percentile
80thpercentile

Out of 1040 buildings in this neighborhood, 208 are predicted to be safer. The band is relative to this neighborhood, so a share of every neighborhood falls in each colour.

RiskiestSafest
Predicted 12-month outcome
89%
No DBI
violation
11%
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 location

Precise location is a proxy for neighborhood-level risk — some SF blocks have systematically higher DBI activity.

Building permits, owner's portfolio

Permits pulled across all of this owner's buildings over 7 years.

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 risk forecast
Low failure risk 11%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

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8 found
The story over time

523-525 43Rd Ave event timeline

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

2019
Building Permit Aug 13
Replace (11) windows at front of house with marvin wood clad double-hung in-kind. maintain transom.
$17,000 · Cancelled

See all 1 events

Full history back to 2019 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 523-525 43Rd Ave apartments

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

Side by side

How 523-525 43Rd Ave compares to the neighborhood

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