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469 27Th Ave

Central Richmond, SF 94121 1459004 2 units · 2 fl · 1921

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 469 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 1921
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 built1921
Total area3,300 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot1459004
Ownership

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

Owner name
Tin Wai & Sau Wah Lum Chan
Mailing address
Tin Wai & Sau Wah Lum Chan 469 27Th Ave San Francisco CA 94121
Last sale
112310

Landlord portfolio

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

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Augrented Insights
Initial analysis

The two-unit multi-family residential building at 469 27th Avenue in the Central Richmond neighborhood, owned by Tin Wai & Sau Wah Lum Chan, was constructed in 1921 and consists of two stories. The property has experienced significant sewer-related challenges in recent years, with eight reported sewage discharge incidents between November 2023 and December 2024, all involving either side sewer vents or catch basins, with the most recent cases occurring in December 2024. These recurring sewer issues, which have all been officially documented as "Closed Case Resolved" by PUC Sewer Operations, suggest persistent infrastructure concerns. The building's history includes several permitted construction projects, though most have either expired or are no longer active: a rear addition and renovation work from 1998, new footing installation from 1999, and work continuation from 1986.

Additional recent incidents affecting the property and its vicinity include a collapsed sidewalk reported in May 2023, which was documented and required attention from PG&E. There were also two general cleaning requests related to loose garbage near the property in March 2024. It's worth noting that a tenant buyout occurred in February 2023 at the neighboring address of 459 27th Avenue, involving two tenants and totaling $70,000, though this may not directly relate to the subject property. While the building has had various repairs and improvements attempted over the years, the recurring nature of the sewer issues represents the most significant pattern of incidents in recent times, with all other historical permits and repairs appearing to have been resolved or no longer applicable.

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

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Risk rating

How 469 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
58th percentile

Out of 2250 buildings in this neighborhood, 945 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
85%
No DBI
violation
15%
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.

DBI complaint rate, owner's portfolio

Per-building complaint rate across the owner's portfolio.

Estimated permit spend (past 7 years)

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

12-Month severity forecast
No violation 82.9%
Moderate concern 11.9%
Severe concern 5.1%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
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The story over time

469 27Th Ave event timeline

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

2025
Planning Record Apr 21
Revision to BPA# 202103116315. Adding new window opening @ 1st floor South side property line. Visible from the street, aluminum clad wood, fixed operation. [email protected] 4/21/25
Closed

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 469 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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