Free SF apartment background check

331 27Th Ave

Central Richmond, SF 94121 1406005 7 units · 3 fl · 1964

This building has significantly more problems than most nearby buildings. Few open issues; problems get fixed quickly. A reasonable bet for a smooth tenancy.

NOVs (7y) vs. neighborhood
Compared to a typical building in Central Richmond
At or below average
avg 0.5
0
FewerMore

This building has 0 novs (7y), at or below the Central Richmond average of 0.5.

Rent & eviction protection

Is 331 27Th Ave 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 1964
2 or more units
7 units
Property type
Multi-Family Residential
Zoning
RH2
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
Units7
Floors3
Year built1964
Total area5,068 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1406005
Ownership

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

Owner name
Oconnor Charles D
Mailing address
313 4th Ave San Francisco CA 94118
Last sale
092420

Landlord portfolio

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

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Augrented Insights
Initial analysis

The two-story, six-unit apartment building at 331 27th Avenue in the Central Richmond neighborhood, owned by Charles D Oconnor, has undergone significant safety upgrades and improvements since its construction in 1964. Most notably, the building completed a mandatory soft-story retrofit in 2016 (with a cost of $70,000) demonstrating compliance with seismic safety requirements. In 2018-2019, substantial fire safety improvements were made, including the installation of a new fire sprinkler system, fire alarm system with low frequency sounders, and monitoring equipment for a new ADU on the ground floor, costing approximately $43,000 in total. The building's fire safety systems have been further enhanced with the installation of a backflow device for the fire sprinkler system in 2020 and associated plumbing work.

The property has maintained compliance with various building safety requirements, with only one notable fire safety-related complaint in 2006 regarding combustible materials, which was promptly corrected. Historical issues from 2002-2003 included multiple fire-related violations such as the need for directional signs, fire extinguishers, and smoke enclosure door repairs, all of which were addressed and abated. Recent infrastructure improvements include electrical system upgrades in 2019 and new fire safety systems, demonstrating proactive maintenance. Earlier maintenance work included reroofing projects in 2011 and a problematic electric-to-gas stove conversion in 1999, which was subsequently resolved. The building's emergency response record shows primarily routine calls, with no civilian injuries reported in any situations. The property has undergone regular inspections and responded to all identified issues, with no active violations or complaints as of October 2023.

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

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Risk rating

How 331 27Th Ave'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
16th percentile

Out of 2250 buildings in this neighborhood, 1890 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
67%
No DBI
violation
33%
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.

Owner's portfolio size

Number of SF parcels this owner is registered on — larger portfolios have distinct risk patterns.

Building age

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

12-Month severity forecast
No violation 61.9%
Moderate concern 25.5%
Severe concern 12.6%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

331 27Th Ave apartment reviews

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The story over time

331 27Th Ave event timeline

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

2021
Building Permit Feb 04
As builts: connect sprinkler to existing combo meter. existing sprinkler system was connected to existing meter. ref 2018 0918 0603
$1 · Issued

See all 7 events

Full history back to 2019 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 331 27Th Ave apartments

13 SF public datasets for this parcel — permits, violations, complaints, fire records, 311 calls, planning records, and buyouts.

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