Free SF apartment background check

221 26Th Ave

Lake Street, SF 94121 1386002 4 units · 3 fl · 1968

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 Lake Street
At or below average
avg 0.6
0
FewerMore

This building has 0 novs (7y), at or below the Lake Street average of 0.6.

Rent & eviction protection

Is 221 26Th 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 1968
2 or more units
4 units
Property type
Multi-Family Residential
Zoning
RM1
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
Units4
Floors3
Year built1968
Total area5,850 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1386002
Ownership

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

Owner name
Wong Wilfred W & Alice Loo
Mailing address
21 Ervine St San Francisco CA 94134
Last sale
071599

Landlord portfolio

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

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Augrented Insights
Initial analysis

The three-story, four-unit multi-family residential building at 221 26th Avenue, owned by Wilfred W. Wong and Alice Loo, has undergone several significant improvements and faced various maintenance challenges since its construction in 1968. Most recently, in December 2024, a tenant filed an active complaint regarding heating system deficiencies, reporting that the apartment could only maintain a temperature of 66°F, which is below the legal minimum requirement of 70°F. The building has seen substantial infrastructure upgrades in recent years, including a voluntary seismic upgrade filed in July 2021 (estimated cost $98,000), installation of an EV charger in March 2023, and a series of plumbing improvements including multiple water heater replacements and backflow prevention device installations between 2013 and 2016. Historical maintenance issues have included multiple instances of water-related problems, with significant incidents in 2011 involving water damage and mold, and balcony structural concerns in 2012, which led to a complaint about unpermitted construction.

The building's maintenance history reveals recurring issues with moisture and water damage, evident from multiple repairs to dry rot in the siding (2007), rotted wood in the balcony structure (2012), and various plumbing modifications. In 2003, the property faced multiple fire safety violations that were subsequently addressed, including issues with smoke detectors and fire escapes. Recent maintenance efforts indicate proactive property management, with substantial investments in seismic safety and electrical infrastructure. While the building has had its share of maintenance challenges, the recent heating complaint suggests that some systems may still require attention. The property has experienced several fire department responses, though none resulted in significant incidents or injuries, primarily relating to false alarms and system activations. Outside the building itself, there have been multiple parking enforcement actions documented through 311 calls, indicating some ongoing challenges with street parking compliance in the area.

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

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Risk rating

How 221 26Th 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
30th percentile

Out of 660 buildings in this neighborhood, 462 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
76%
No DBI
violation
24%
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 size

Total floor area — a proxy for building scale and the number of systems (plumbing, electrical, HVAC) that can fail.

Building permits, owner's portfolio

Permits pulled across all of this owner's buildings over 7 years.

12-Month severity forecast
No violation 76.1%
Moderate concern 13.6%
Severe concern 10.4%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

221 26Th Ave apartment reviews

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The story over time

221 26Th Ave event timeline

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

2024
DBI Complaint Dec 13
Date last observed: 12-dec-24; time last observed: 4pm; floor: 4; unit: 4; exact location: common area; building type: residence/dwelling no heat; ; additional information: my apartment will only get up to 66f and feels cold. i understand that the law requires a minimum temperature of 70°f. i¿ve been living in this building for five years and have previously reported heating issues to management.this is it's just too cold. i asked them to fix heat again 2 weeks ago and its still cold. are you able to send an inspector to verify my complaint? ;
Housing Inspection Services

See all 6 events

Full history back to 2021 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 221 26Th 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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