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1526-1528 California St

Nob Hill, SF 94109 0644010 3 units · 2 fl · 1907

This building has a higher-than-average number of open problems nearby. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood
Compared to a typical building in Nob Hill
At or below average
avg 2.4
2
FewerMore

This building has 2 novs (7y), at or below the Nob Hill average of 2.4.

Rent & eviction protection

Is 1526-1528 California 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
3 units
Property type
Multi-Family Residential
Zoning
POLK
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 built1907
Total area3,125 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0644010
Ownership

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

Owner name
Chien Family Trust
Mailing address
Peter Chien Po Box 16527 San Francisco CA 94116
Last sale
110398

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.

1528 California St, San Francisco, CA 94109
1526 California St, San Francisco, CA 94109
Augrented Insights
Initial analysis

The two-story multi-family residential building at 1526-1528 California Street in Nob Hill, owned by the Chien Family Trust, was constructed in 1907 and contains two residential units and one commercial unit. The property has experienced significant recent maintenance issues, particularly with the roof and drainage systems. In early 2024, multiple complaints were filed regarding water leaks and drainage problems, including clogged and leaking roof drains, corroded drain stacks, and an unapproved sink drain, which were documented as health and safety violations. The building underwent several repairs in 2024, including roof repairs, plumbing work, and drainage pipe replacements, with costs totaling approximately $9,500. The commercial space has seen some transitional use changes, notably converting from a computer store to a dry cleaning operation in 2014, including associated renovations such as flooring replacement and the installation of washers and dryers.

Historical records show the building has faced various issues over the years, including electrical problems in 2000 with potentially hazardous wiring, compressor noise complaints in 2018, and a fire escape violation in 2006 that required correction. The property has also been the subject of multiple 311 calls regarding sidewalk cleanliness and waste disposal, with recent reports in 2024 noting issues with garbage and debris on public property. In 2023-2024, the commercial tenant filed several complaints about water leaks and potential mold concerns, particularly regarding inadequate roof repairs and drainage systems, which became particularly problematic during rainy weather. While most recent violations were abated by February 2024, the recurring nature of water-related issues suggests ongoing infrastructure challenges. The building has received various permits for maintenance and improvements over the years, including electrical modifications and plumbing installations, indicating regular maintenance efforts by ownership.

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

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Risk rating

How 1526-1528 California 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 1125 buildings in this neighborhood, 731 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
48%
No DBI
violation
52%
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.

DBI tenant complaints (past 7 years)

Formal complaints tenants filed with DBI about this building over 7 years.

Property class: apartment building

Apartment building — this property classification influences expected violation rates.

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 24.7%
Moderate concern 64.3%
Severe concern 11.0%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
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The story over time

1526-1528 California St event timeline

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

2026
311 Request Jun 08
Garbage and debris
furniture
311 RequestJan 15
Homelessness and supportive housing

See all 14 events

Full history back to 2023 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 1526-1528 California 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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