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441 31St Ave

Central Richmond, SF 94121 1463009 2 units · 2 fl · 1970

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 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 441 31St 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 1970
2 or more units
2 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
Units2
Floors2
Year built1970
Total area3,745 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot1463009
Ownership

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

Owner name
Hum Robert W & Susan G
Mailing address
443 31st Ave San Francisco CA 94121
Last sale
000000

Landlord portfolio

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

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Augrented Insights
Initial analysis

The property at 441 31st Avenue in the Central Richmond district is a two-unit, two-story multi-family residential building constructed in 1970, currently owned by Robert W. and Susan G. Hum. The building's permit history shows one significant modification from 1991, when a street-level room and bathroom (without kitchen) was legalized, representing the only documented structural change in over three decades.

The property has experienced recurring sewer-related issues, with three documented sewage back-ups between 2015-2021, all involving 4-inch sewer vents, suggesting a persistent plumbing challenge. The most recent sewer service request was recorded in June 2021. The building's maintenance history also includes a general request for PUC services in May 2021, though the specific nature of this request is not detailed in the records.

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

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Risk rating

How 441 31St 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
89th percentile

Out of 2250 buildings in this neighborhood, 248 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
91%
No DBI
violation
9%
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.

Construction spend, owner's portfolio

Estimated permit value across all of this owner's buildings.

Estimated permit spend (past 7 years)

Dollar value of permits pulled at this address — large recent spend can signal deferred-maintenance catch-up.

Property class: multi-family flat

2–4 unit flats (class F) are a common SF building type with their own maintenance and complaint patterns.

12-Month severity forecast
No violation 84.2%
Moderate concern 10.8%
Severe concern 5.0%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

441 31St Ave apartment reviews

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The story over time

441 31St Ave event timeline

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

2025
Building Permit Dec 09
Re-roofing: remove and replace roofing material / existing roofing material (in-kind)
$31,000 · Complete

See all 1 events

Full history back to 2025 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 441 31St Ave 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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