Free SF apartment background check

475 Warren Dr

Forest Knolls, SF 94131 2634060 12 units · 5 fl · 1961

This building has far more open problems than almost any other in the neighborhood. Renters here report frequent, slow-to-fix problems. Get repair promises in writing and check the unit before signing.

NOVs (7y) vs. neighborhood
Compared to a typical building in Forest Knolls
Above average
avg 1.9
13
FewerMore

This building has 13 novs (7y), above the Forest Knolls average of 1.9.

Rent & eviction protection

Is 475 Warren Dr 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 1961
2 or more units
12 units
Property type
Multi-Family Residential
Zoning
RM2
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
Units12
Floors5
Year built1961
Total area10,594 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot2634060
Ownership

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

Owner name
Khostovan Ali & Fatemah
Mailing address
506 Craig Rd Hillsborough CA 94010
Last sale
051111

Landlord portfolio

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

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Augrented Insights
Initial analysis

The five-story multi-family residential building at 475 Warren Drive, owned by Khostovan Ali & Fatemah, was constructed in 1961 and contains 12 units. The property has a consistent history of maintenance and safety compliance issues, most recently evidenced by April 2024 violations regarding fire alarm systems, extinguishers, and exit signs, though these were subsequently abated. A significant recent concern involved a tenant complaint in 2024 about an unsafe balcony in Apartment 3, leading to deck repairs completed in December 2024. The building has experienced recurring fire safety concerns, with violations noted in 2020 and 2022 related to extinguishers and alarm systems, though these were corrected. Historical maintenance records show various repairs and upgrades, including multiple unit renovations in 2009-2014, addressing issues such as dry rot, damaged walls, and bathroom fixtures. The property has undergone significant infrastructure work, including reroofing in 1993, and more recent plumbing updates in units 1, 2, and 10 (2013-2014).

The building's maintenance history reveals persistent challenges with building systems and resident amenities, including heating issues in 2011 that required PG&E intervention, plumbing problems in 2022, and multiple fire safety system violations. Routine and complaint-based inspections have been conducted regularly, revealing various interior and exterior maintenance needs, including a recent 2023 sidewalk defect report. Historical violations from 2003-2005 indicate past challenges with fire escape maintenance, storage compliance, and interior surface conditions, though these issues were resolved. The property's location has experienced recurring parking enforcement issues in recent years, with multiple citations issued for various parking violations between 2023-2024.

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

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Risk rating

How 475 Warren Dr'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
6th percentile

Out of 50 buildings in this neighborhood, 47 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
19%
No DBI
violation
81%
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.

NOV rate, owner's portfolio

Per-building NOV rate across everything this owner manages — high rates signal pattern neglect.

Building size

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

Number of units

The number of units affects how the model reads complaint and violation totals — more units means more potential sources.

12-Month severity forecast
No violation 8.6%
Moderate concern 62.9%
Severe concern 28.4%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

475 Warren Dr apartment reviews

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The story over time

475 Warren Dr event timeline

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

2026
DBI Complaint May 18
No hot water
Housing Inspection Services
Building Violation (NOV)May 15
Building violation

See all 21 events

Full history back to 2023 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 475 Warren Dr 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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