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1640 Clay St

Nob Hill, SF 94109 0620008 9 units · 3 fl · 1988

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
Above average
avg 2.4
4
FewerMore

This building has 4 novs (7y), above the Nob Hill average of 2.4.

Rent & eviction protection

Is 1640 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 1988
2 or more units
9 units
Property type
Multi-Family Residential
Zoning
RM3
Not rent-controlled. Buildings constructed after 1978 are generally exempt from SF rent increase limits under the Costa-Hawkins Act.

Based on SF Assessor records. Not legal advice — confirm with the SF Rent Board.

Building characteristics
Units9
Floors3
Year built1988
Total area9,975 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0620008
Ownership

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

Owner name
Janot Jacques N
Mailing address
4233 Geary Blvd San Francisco CA 94118
Last sale
000000

Landlord portfolio

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

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Augrented Insights
Initial analysis

The 9-unit multi-family residential building at 1640 Clay St in Nob Hill, owned by Janot Jacques N, has undergone several significant safety improvements over its nearly 40-year history. Built in 1988 after a demolition project in 1984, the 3-story apartment building has seen various fire safety upgrades, including a voluntary system replacement in 2014 (costing $4,200) that replaced the control panel and tied in bells and sprinkler devices to a new central monitoring system, with additional smoke detectors installed in stairwells. Recent building inspections in 2023 revealed multiple violations related to compliance affidavits that were abated by June 2023. The building has experienced some maintenance issues, including vandalism in the lobby and stairwell door problems reported in July 2023, and a water leak incident in 2017. Historical fire safety concerns have been addressed through timely corrections, with recorded issues regarding fire escapes, blocked exits, and alarm systems being resolved between 2018-2024. The property has had two carbon monoxide detector activations, both with no CO detected, and has faced some exterior maintenance challenges, as evidenced by multiple 311 calls regarding graffiti, tree damage, and general cleaning issues in the surrounding area between 2020-2023. The building's management has generally responded to violations and maintenance issues, with most problems being resolved within reasonable timeframes, though there have been periods of accumulated complaints requiring attention.

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

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Risk rating

How 1640 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
32th percentile

Out of 1125 buildings in this neighborhood, 765 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
42%
No DBI
violation
58%
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.

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.

12-Month severity forecast
No violation 60.1%
Moderate concern 32.0%
Severe concern 7.9%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

1640 Clay St apartment reviews

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The story over time

1640 Clay St event timeline

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

2025
311 Request Nov 19
311 service request
Encampment
311 RequestNov 18
311 service request

See all 9 events

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

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Every record we have

Full data for 1640 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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