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646 Ofarrell St

Downtown, SF 94109 0319012 11 units · 3 fl · 1915

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 Downtown
Above average
avg 6.9
7
FewerMore

This building has 7 novs (7y), above the Downtown average of 6.9.

Rent & eviction protection

Is 646 Ofarrell 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 1915
2 or more units
11 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
Units11
Floors3
Year built1915
Total area5,169 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0319012
Ownership

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

Owner name
Decker Holding Llc
Mailing address
Po Box 642771 San Francisco CA 94164
Last sale
091919

Landlord portfolio

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

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Augrented Insights
Initial analysis

646 Ofarrell St is a three-story, 11-unit multi-family residential building constructed in 1915, currently owned by Decker Holding LLC. The building, which is classified as an unreinforced masonry structure, has undergone several significant safety improvements over the years, including a seismic hazard initialization project in 2001 costing $82,000 and reroofing in 2001. The building has experienced multiple concerning incidents, including a small kitchen fire in 2003 that required electrical repairs, and serious maintenance issues in 2002 following fire damage that left debris and hazardous conditions. Notable safety violations were documented in September 2001, including problems with heat provision, smoke detectors, floor coverings, and potential lead paint hazards, though these were later abated by December 2001.

More recent concerns include active complaints regarding indoor battery charger safety in 2016, and several maintenance and safety violations were recorded between 2000-2003. The building has had recurring fire safety issues, as evidenced by multiple fire complaints between 2008-2023 regarding alarms, extinguishers, and fire escapes, though most have been marked as "Condition Corrected." Recent activity around the property has generated multiple 311 calls for various issues including excessive noise, garbage and debris, and encampments near the building, with several cases remaining open or having been resolved between 2024 and 2025. The building's maintenance history shows a pattern of both ongoing upkeep and periodic safety violations that have required attention, particularly relating to fire safety systems and building infrastructure.

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

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Risk rating

How 646 Ofarrell 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
74th percentile

Out of 448 buildings in this neighborhood, 116 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
32%
No DBI
violation
68%
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.

Building age

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

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 19.4%
Moderate concern 31.9%
Severe concern 48.6%
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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The story over time

646 Ofarrell St event timeline

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

2026
Fire Complaint Apr 03
Exit Maintenance

See all 16 events

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

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Every record we have

Full data for 646 Ofarrell 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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