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1635-1637 Leavenworth St

Nob Hill, SF 94109 0155007 2 units · 2 fl · 1911

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 1635-1637 Leavenworth 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 1911
2 or more units
2 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
Units2
Floors2
Year built1911
Total area3,230 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0155007
Ownership

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

Owner name
William H Wong Bypass Tr
Mailing address
Wong Lilly Ttee 1637 Leavenworth St San Francisco CA 94109
Last sale
052021

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.

1637 Leavenworth St, San Francisco, CA 94109
1635 Leavenworth St, San Francisco, CA 94109
Augrented Insights
Initial analysis

The property at 1635-1637 Leavenworth Street is a two-unit, two-story multi-family residential building located in Nob Hill, constructed in 1911. The building has undergone several significant modifications over the years, including an unauthorized top floor addition in 1984, installation of a fire escape stair in 1985, and vinyl siding installation in 2000. Most notably, between 2018 and the present, there have been ongoing issues related to unpermitted construction work. A 2018 complaint led to a permit (201807275734) being issued to remove unauthorized construction and restore the original rear wall, but an internal audit in October 2024 revealed that this work was never completed, resulting in an active violation (202430322) regarding the unremoved top floor addition. The building has experienced multiple fire-related incidents, including one building fire with one civilian injury recorded, several smoke detector activations, and a stalled elevator rescue, though most incidents involved no injuries or were related to false alarms.

Recent activity at the property has included multiple 311 calls between 2023-2024, primarily regarding parking issues and street cleaning concerns, as well as some complaints about illegal parking and debris. A significant fire incident occurred in October 2024, resulting in the response of fire personnel to address the situation. The property has also been subject to various building complaints and inspections, including a 2018 investigation into unauthorized construction work and a more recent complaint in December 2023. The history of unpermitted modifications and ongoing violations related to the unauthorized top floor addition raise potential concerns about building code compliance and safety, while the numerous fire incidents suggest potential fire safety system maintenance issues.

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

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Risk rating

How 1635-1637 Leavenworth 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
94th percentile

Out of 1125 buildings in this neighborhood, 68 are predicted to be safer.

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.

NOV rate, owner's portfolio

Per-building NOV rate across everything this owner manages — high rates signal pattern neglect.

Building age

Older buildings tend to have more maintenance challenges; SF's pre-1906 earthquake housing stock carries distinct risk.

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 severity forecast
No violation 85.5%
Moderate concern 11.0%
Severe concern 3.5%
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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On the map

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The story over time

1635-1637 Leavenworth St event timeline

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

2025
311 Request Oct 31
Garbage and debris
furniture
Building PermitJun 10
Re-roofing w/ hot works. tear off existing roofing and replace with new modified bitumen.

See all 7 events

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

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Every record we have

Full data for 1635-1637 Leavenworth 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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