Free SF apartment background check

531 41St Ave

Outer Richmond, SF 94121 1503005 2 units · 2 fl · 1903

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

NOVs (7y) vs. neighborhood
Compared to a typical building in Outer Richmond
Above average
avg 0.7
9
FewerMore

This building has 9 novs (7y), above the Outer Richmond average of 0.7.

Rent & eviction protection

Is 531 41St 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 1903
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 built1903
Total area2,650 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1503005
Ownership

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

Owner name
Chananudech Benjavan & Luck
Mailing address
533 41st 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 two-unit residential building at 531 41st Avenue in San Francisco's Outer Richmond district is a 2-story flats and duplex structure built in 1903, currently owned by Chananudech Benjavan & Luck. The property's maintenance history reveals several significant events, with the most recent being a complaint filed in September 2024 regarding unpermitted plumbing work and concrete modifications. This follows a pattern of construction-related issues, including a 2015 violation concerning hazardous exterior stairs and siding replacement that went through multiple notice stages before being abated in March 2018. The building underwent vertical and horizontal additions in 1988, reflecting substantial past modifications to the structure.

Recent concerns primarily relate to parking and noise issues, with three reports of excessive noise and multiple complaints about driveway blocking between 2021 and 2024, though most parking enforcement matters were resolved through officer intervention. There were also two relevant maintenance issues reported in 2021-2022: an abandoned vehicle incident and exposed cable concerns that were determined to be cable company equipment rather than streetlight wiring. While the building has experienced some maintenance and compliance challenges over the years, particularly regarding construction work, the property has undergone several significant improvements, including the 2015 siding and stair repairs and the 1988 expansion project.

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

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Risk rating

How 531 41St 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
29th percentile

Out of 1040 buildings in this neighborhood, 738 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
78%
No DBI
violation
22%
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.

Neighborhood location

Precise location is a proxy for neighborhood-level risk — some SF blocks have systematically higher DBI activity.

Building age

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

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 66.5%
Moderate concern 25.8%
Severe concern 7.7%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

531 41St Ave apartment reviews

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The story over time

531 41St Ave event timeline

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

2026
Building Violation (NOV) Jan 05 Serious
The legal use of this building is r-3, two family dwelling on three floors of occupancy. inspection and permit history research revealed that there is unpermitted construction, plumbing and electric work on the first floor above the garage. permit research indicates the first floor unit originally extended beyond the current living room, bathroom, bedroom and kitchen, into an additional 2 bedrooms, a 2nd bathroom, and an exterior deck leading to rear yard. permit research failed to indicate any valid permits were issued to separate these rooms from the front of the unit. the code violations (including but not limited to the) following, exist at this property: * work without permit. [sfhc 301; sfbc 106a, 108.4] * unapproved wiring. [sfhc 1001(e)] * unapproved plumbing. [sfhc 1001(f)]
DBI ComplaintJan 05
Date last observed: 02-jan-26; floor: middle; exact location: main bldg; building type: residence/dwelling illegal unit; ; additional information: the building at 531-533 41st ave is legally 2 units (2 flats, each flat is 3 bedrooms+2 bathrooms) on top of garage/ground level and has 2 electric meters and 2 gas meters. unpermitted conversion of 1 unit (the flat at 533 41st ave), into 2 units. resulted in the one tenant renting the unpermitted/converted unit paying for the electric and gas usage for both unpermitted/converted units in 533 41st ave, the garage/ground level, and other common areas, as owner states the tenant has own meter/not shared. please legalize the unpermitted units/conversion.;

See all 13 events

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

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Every record we have

Full data for 531 41St Ave apartments

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

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