Free SF apartment background check

435 6Th Ave

Inner Richmond, SF 94118 1538006 2 units · 2 fl · 1915

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 Inner Richmond
At or below average
avg 0.9
0
FewerMore

This building has 0 novs (7y), at or below the Inner Richmond average of 0.9.

Rent & eviction protection

Is 435 6Th 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 1915
2 or more units
2 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
Units2
Floors2
Year built1915
Total area2,100 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1538006
Ownership

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

Owner name
Leong Lan Heung
Mailing address
435 6th Ave San Francisco CA 94118
Last sale
031198

Landlord portfolio

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

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Augrented Insights
Initial analysis

The two-unit, two-story residential building at 435 6th Avenue in San Francisco's Inner Richmond district is a property owned by Leong Lan Heung and was constructed in 1915 as a flats and duplex structure. The building is currently undergoing significant exterior improvements, with an issued permit from August 2024 for extensive siding work on both the rear and south walls, totaling 2,200 square feet of new composite siding at a cost of $53,000. The property has experienced recurring issues with its alarm system, with violations documented in September 2023 and August 2019, though the most recent violation has been abated. Historical records show earlier repairs including stucco work in 1990 and reroofing in 1988, with an expired permit.

The building and its immediate surroundings have been the subject of various municipal service calls in recent years, most notably including two open sidewalk defect cases (from May 2024 and November 2020). The property experienced a series of municipal interventions in 2021, when multiple instances of illegal postings were reported and resolved, along with some street cleaning and a vandalized tree incident. Noise complaints were also recorded in early 2020. While the building has had fire code violations in 2019 and 2023, they appear to have been addressed promptly, with the most recent violation related to the alarm system being corrected. The property's maintenance history shows attention to exterior upkeep, though the recurring nature of the alarm system issues and sidewalk problems may warrant observation.

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

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Risk rating

How 435 6Th 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
71th percentile

Out of 1723 buildings in this neighborhood, 500 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
87%
No DBI
violation
13%
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.

Building age

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

Construction spend, owner's portfolio

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

Building permits, owner's portfolio

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

12-Month severity forecast
No violation 81.5%
Moderate concern 14.3%
Severe concern 4.2%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

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The story over time

435 6Th Ave event timeline

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

2024
Building Permit Aug 14
Remove the (e) siding on the back yard, use the same materials window waterproofing 1,300 square ft. also remove (e) stucco south wall new material to use siding 900 square ft. new exterior finish to be composite siding
$53,000 · Complete
Planning RecordAug 14
Replace siding on side property line with wood composite siding.

See all 2 events

Full history back to 2024 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 435 6Th 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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