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646 Ofarrell St

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

A handful of records on file over the last seven years, and our model predicts a high risk of further maintenance problems in the next 12 months. A few records worth reading before you sign. Check whether they were closed out, and ask what was actually fixed.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Downtown — not a forecast
Above average
avg 6.9
7
FewerMore

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

The bar and the rating point different ways because they measure different things: the bar counts DBI violations already on file, the rating forecasts the next 12 months.

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.

Statewide backstop · AB 1482

California Tenant Protection Act of 2019

Even when a building isn't covered by local rent stabilization, the statewide Tenant Protection Act (AB 1482) may still apply. It caps annual rent increases and requires the landlord to state a legal reason to end most tenancies.

15+ years since occupancy
Built 1915
Annual rent increase cap
5% + CPI, max 10%
Just-cause eviction
After 12 months
Local rent control likely takes priority. This building appears to fall under the local ordinance above, which is stronger than AB 1482. Where a local just-cause ordinance applies, its rules govern instead of the state cap.

AB 1482 does not apply to single-family homes and condos unless owned by a corporation, REIT, or an LLC with a corporate member; to owner-occupied duplexes; or to deed-restricted affordable housing. The Act is in effect until January 1, 2030. Not legal advice — see the California landlord–tenant guide.

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
Mailing address
Po Box 642771 San Francisco CA 94164
Last sale
April 30, 1998

Landlord portfolio

Other SF properties this owner holds, with a risk rating 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

Lower risk — safer than most nearby

DBI rarely finds violations here. Strong maintenance history and a clean complaint record.

Typical — about average for the neighborhood

Some past violations or complaints on record. Worth asking the landlord about any open issues before signing.

Higher risk — riskier than most nearby

Elevated violation and complaint history. DBI has found issues here before and is statistically likely to again.

Neighborhood percentile
73rdpercentile

Out of 448 buildings in this neighborhood, 121 are predicted to be safer. The band is relative to this neighborhood, so a share of every neighborhood falls in each colour.

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 risk forecast
High failure risk 68%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

646 Ofarrell St apartment reviews

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On the map

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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.

Side by side

How 646 Ofarrell St compares to the neighborhood

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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

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