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1645 Clay St

Nob Hill, SF 94109 0621018 6 units · 3 fl · 1910

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 Nob Hill
At or below average
avg 2.4
1
FewerMore

This building has 1 novs (7y), at or below the Nob Hill average of 2.4.

Rent & eviction protection

Is 1645 Clay 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 1910
2 or more units
6 units
Property type
Multi-Family Residential
Zoning
RM3
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
Units6
Floors3
Year built1910
Total area5,370 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0621018
Ownership

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

Owner name
Chan Lvg Tr
Mailing address
Chan Donald Trustee 1645 Clay St Apt 2 San Francisco CA 94109
Last sale
120816

Landlord portfolio

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

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Augrented Insights
Initial analysis

The three-story multi-family residential building at 1645 Clay Street in the Nob Hill neighborhood, constructed in 1910, has undergone several significant improvements over the past two decades, demonstrating ongoing maintenance and upgrades. Most notably, the building completed its mandatory soft-story retrofit in 2017 at a cost of $98,280, achieving compliance with San Francisco's earthquake safety requirements. The property has seen substantial modernization efforts, including a complete electrical system upgrade in 2008 with the installation of a 200-amp main switch and seven meters, window replacements in 2012 with low-E fiberglass windows, and various roof repairs including work in 1996, 1993, and most recently in 2013. Building maintenance records indicate attention to ongoing issues, such as stair repairs in 2010 and various interior maintenance projects.

The building has experienced several maintenance and compliance challenges over its history. Notable incidents include a significant violation in 2005 regarding water damage and bathroom repairs, which led to multiple violations and correction orders addressing various interior and safety issues including lead paint concerns and plumbing problems. A 2008 complaint highlighted ceiling and water damage issues in the lobby/hallway areas. More recent concerns include graffiti on the building in 2023 and a 2020 violation related to mandatory seismic retrofit compliance, though this was subsequently resolved with the issuance of a Certificate of Final Completion. The property has maintained active compliance with most building codes and requirements, with completed repairs to various building systems including stairs, electrical, and plumbing, though some older permits from 1996-2005 remain in expired status, suggesting completion of those respective works. Recent 311 calls mostly concern external matters such as street lighting and parking infrastructure, rather than building-specific issues.

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

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Risk rating

How 1645 Clay 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
50th percentile

Out of 1125 buildings in this neighborhood, 562 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
63%
No DBI
violation
37%
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.

DBI tenant complaints (past 7 years)

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

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 43.7%
Moderate concern 33.6%
Severe concern 22.8%
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

1645 Clay St event timeline

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

2025
Electrical Permit Nov 05
Ref: witness test fee for e202504261992
Complete
Building PermitMay 15
Upgrade existing fire alarm system to comply with sffc section 1103.7.6.1

See all 6 events

Full history back to 2020 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 1645 Clay 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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