Free SF apartment background check

470 Warren Dr

Forest Knolls, SF 94131 2635047 20 units · 4 fl · 1963

This building has significantly more problems than most nearby buildings. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood
Compared to a typical building in Forest Knolls
Above average
avg 1.9
9
FewerMore

This building has 9 novs (7y), above the Forest Knolls average of 1.9.

Rent & eviction protection

Is 470 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 1963
2 or more units
20 units
Property type
Multi-Family Residential
Zoning
RM4
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.

Statewide backstop · AB 1482

California Tenant Protection Act of 2019

Even when a building isn't covered by local rent stabilization, the statewide Tenant Protection Act (AB 1482) may still apply. It caps annual rent increases and requires the landlord to state a legal reason to end most tenancies.

15+ years since occupancy
Built 1963
Annual rent increase cap
5% + CPI, max 10%
Just-cause eviction
After 12 months
Local rent control likely takes priority. This building appears to fall under the local ordinance above, which is stronger than AB 1482. Where a local just-cause ordinance applies, its rules govern instead of the state cap.

AB 1482 does not apply to single-family homes and condos unless owned by a corporation, REIT, or an LLC with a corporate member; to owner-occupied duplexes; or to deed-restricted affordable housing. The Act is in effect until January 1, 2030. Not legal advice — see the California landlord–tenant guide.

Building characteristics
Units20
Floors4
Year built1963
Total area18,285 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot2635047
Ownership

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

Owner name
Mailing address
4444 Geary Blvd San Francisco CA 94118
Last sale
050503

Landlord portfolio

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

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Augrented Insights
Initial analysis

The 20-unit, four-story multi-family residential building at 470 Warren Drive in Forest Knolls, built in 1963, has undergone several significant improvements and faced various maintenance challenges over its history. Most notably, the building completed a mandatory soft-story retrofit in September 2018, which included the installation of new moment frames and plywood shearwalls, bringing the building up to current seismic safety standards. Other major improvements include a comprehensive window replacement project in 2012 (installing 66 vinyl windows and 3 patio doors), multiple roofing projects (2010 and 2013), and termite repairs completed in 2000. The building has experienced periodic maintenance issues, including a water pipe leak repair in 2016 and some significant building violations in 2024 related to fire safety requirements, including combustible storage issues and ceiling repairs that were subsequently abated in May 2024.

The property has a documented history of fire safety concerns, with multiple violations and incidents recorded between 2006 and 2023, including issues with fire alarms, extinguishers, and hazardous materials, though most were promptly corrected. The building has experienced several false fire alarm activations and smoke detector malfunctions, with only one recorded genuine cooking-related fire incident. Parking enforcement has been a recurring issue in recent years, with multiple citations issued for vehicles blocking driveways between 2021 and 2024. The most recent building inspection and complaint activity suggest ongoing attention to fire safety compliance is necessary, with violations noted in November 2023 regarding sleeping area requirements and the need for permit compliance. While the building's major systems have been upgraded to meet current codes, the presence of recent violations and historical maintenance issues suggests continued monitoring of building conditions is warranted.

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

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Risk rating

How 470 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
16th percentile

Out of 50 buildings in this neighborhood, 42 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
37%
No DBI
violation
63%
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.

NOV rate, owner's portfolio

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

12-Month severity forecast
No violation 22.6%
Moderate concern 37.4%
Severe concern 39.9%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

470 Warren Dr apartment reviews

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On the map

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The story over time

470 Warren Dr event timeline

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

2025
Fire Complaint Jun 09
Exit Maintenance
No Merit

See all 9 events

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

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Every record we have

Full data for 470 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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