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431-433 Frederick St

Cole Valley/Parnassus Heights, SF 94117 1267056 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 Cole Valley/Parnassus Heights
At or below average
avg 0.9
0
FewerMore

This building has 0 novs (7y), at or below the Cole Valley/Parnassus Heights average of 0.9.

Rent & eviction protection

Is 431-433 Frederick 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
RH3
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 area2,940 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1267056
Ownership

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

Owner name
Lockary/Thompson Fmly Lvg T
Mailing address
Lockary J Francis&thompson 775 10Th Ave San Francisco CA 94118
Last sale
051402

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.

431 Frederick St, San Francisco, CA 94117
433 Frederick St, San Francisco, CA 94117
Augrented Insights
Initial analysis

The 4-unit, 2-story multi-family residential building at 431-433 Frederick Street, owned by the Lockary/Thompson Family Living Trust, was constructed in 1908 and has experienced several significant maintenance events over its history. Most notably, in 2024, there is an open fire violation regarding sleeping area requirements that was cited in July. The building underwent a complete roof replacement in 2005 at a cost of $9,500, which included 40-year composition shingles, and substantial structural work was performed in 2002, including stair repairs, deck removal, and handrail support improvements. A series of serious safety violations was documented in February 2002, including issues with stairs, smoke detectors, emergency egress, and various fire safety concerns, though all were abated by May 2002.

The building has had three routine housing inspections since 1998 (1998, 2006, and 2011), while a significant complaint was filed in 2002 reporting multiple roof leaks, mold growth, window issues, electrical problems, and lighting failures. More recently, in 2024, there was one documented fire violation regarding sleeping area requirements that remains open. The property has experienced routine systematic maintenance issues through the years, with several repairs to ensure safety and compliance with building codes, particularly in the early 2000s when multiple violations were addressed and resolved. The building's location is affected by external events such as the Outside Lands Festival in Golden Gate Park and urban maintenance activities, with recent complaints regarding noise from the festival and street cleaning matters being handled through regular city channels.

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

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Risk rating

How 431-433 Frederick 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
35th percentile

Out of 526 buildings in this neighborhood, 342 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
70%
No DBI
violation
30%
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.

Estimated permit spend (past 7 years)

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

Neighborhood location

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

12-Month severity forecast
No violation 59.2%
Moderate concern 18.4%
Severe concern 22.4%
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

431-433 Frederick St event timeline

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

2025
311 Request Nov 27
Parking on sidewalk
Parking Enforcement
311 RequestJul 29
Other illegal parking

See all 4 events

Full history back to 2024 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 431-433 Frederick St apartments

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

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