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434 Leavenworth St

Tenderloin, SF 94102 0323016 59 units · 5 fl · 1911

This building has far more open problems than almost any other in the neighborhood. Renters here report frequent, slow-to-fix problems. Get repair promises in writing and check the unit before signing.

NOVs (7y) vs. neighborhood
Compared to a typical building in Tenderloin
Above average
avg 12.0
37
FewerMore

This building has 37 novs (7y), above the Tenderloin average of 12.0.

Rent & eviction protection

Is 434 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
59 units
Property type
Multi-Family Residential
Zoning
RC4
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
Units59
Floors5
Year built1911
Total area34,565 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0323016
Ownership

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

Owner name
Sf 434 Leavenworth Llc
Mailing address
Steven C. Thrower 1 Bush St Ste 900 San Francisco CA 94104
Last sale
022113

Landlord portfolio

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

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Augrented Insights
AI summary

434 Leavenworth Street is a 5-story, 59-unit multi-family residential building constructed in 1911, currently owned by SF 434 Leavenworth LLC and located in the Tenderloin neighborhood. The building has undergone several significant renovations in recent years, most notably a comprehensive unit upgrade program in 2021-2024 that includes kitchen and bathroom rehabilitations, washer/dryer installations, and the recent conversion from a wireless to a hardwired fire alarm system with an associated cost of approximately $103,194 completed in June 2024. The building's systems have received attention through multiple infrastructure upgrades, including the installation of new tankless Rinnai water heaters in April 2023 to replace the previous boiler system.

Despite these improvements, the property has experienced numerous maintenance and safety challenges in recent years. There have been recurring issues with the elevator system, with complaints about extended outages in 2023-2024, and multiple fire safety violations have been documented, including recurring alarm system problems and sprinkler/standpipe system violations throughout 2023-2024. The building has also faced several health and safety concerns, as evidenced by multiple building violations filed in late 2023 regarding interior surfaces, including mold/mildew issues, damaged ceilings, and window repairs. Recent complaints from September 2024 specifically mentioned ongoing garbage and sanitation issues, including problems with waste collection and the number of garbage receptacles available for the large building size. The property has also seen a series of 311 calls regarding encampments and various sanitation issues in early 2025, indicating continuing challenges with building exterior maintenance and security in the surrounding area.

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Risk rating

How 434 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
4th percentile

Out of 172 buildings in this neighborhood, 165 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
5%
No DBI
violation
95%
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.

Notices of Violation (past 7 years)

DBI issued Notices of Violation at this address over the last 7 years — a direct record of code enforcement activity.

Building size

Total floor area — a proxy for building scale and the number of systems (plumbing, electrical, HVAC) that can fail.

12-Month severity forecast
No violation 6.8%
Moderate concern 58.3%
Severe concern 34.9%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

434 Leavenworth St apartment reviews

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The story over time

434 Leavenworth St event timeline

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

2025
311 Request Nov 12
Blocking driveway cite tow
Parking Enforcement
311 RequestNov 08
Blocking driveway cite tow

See all 36 events

Full history back to 2021 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 434 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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