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414-416 Warren Dr

Forest Knolls, SF 94131 2635042 12 units · 2 fl · 1961

This building has more problems than most buildings in this neighborhood. 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
5
FewerMore

This building has 5 novs (7y), above the Forest Knolls average of 1.9.

Rent & eviction protection

Is 414-416 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
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.

Building characteristics
Units12
Floors2
Year built1961
Total area8,926 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot2635042
Ownership

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

Owner name
Biscay Jacques & Leonie Trs
Mailing address
14 Forest Knolls Dr San Francisco CA 94131
Last sale
000000

Landlord portfolio

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

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Multiple entrances & addresses

Included addresses

All street addresses sharing this blocklot that are covered by this report.

414 Warren Dr, San Francisco, CA 94131
416 Warren Dr, San Francisco, CA 94131
Augrented Insights
Initial analysis

The 12-unit, 2-story multi-family residential building at 414-416 Warren Drive was built in 1961 and is currently owned by Biscay Jacques & Leonie Trusts. The building has undergone several significant improvements, most notably completing a mandatory soft-story seismic retrofit in 2017 at a cost of $60,000, which included foundation reinforcement and new steel frames at garage openings. Recent maintenance work included the installation of new garage doors and openers in 2018 ($10,000), reroofing in 2016 ($13,000), and the addition of six garage outlets in 2018. The building has experienced some safety and maintenance issues, with multiple fire department responses including a blocked exit violation in 2019, two natural gas leak incidents, carbon monoxide detector activations, and a brief building fire with no reported injuries. In March 2024, multiple building violations were recorded regarding peeling exterior paint, weather proofing issues, and potential lead paint concerns, though these were abated by April 2024.

The property has a documented history of routine inspections and maintenance, with records showing efforts to address various building needs over the years. Historical permits from 1985 and 1996 indicate past improvements to bring the building up to code and address roofing needs. The surrounding area has seen occasional issues with parking violations and general street maintenance, as evidenced by 311 calls between 2020-2024, though these are not directly related to building conditions. The building's safety systems have had some false activations, but there have been no reported civilian injuries from any incidents. The property currently holds a Tier 3 soft-story status with work completed and a Certificate of Final Completion issued.

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

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Risk rating

How 414-416 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
22th percentile

Out of 50 buildings in this neighborhood, 39 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
38%
No DBI
violation
62%
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.

Neighborhood location

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

12-Month severity forecast
No violation 22.1%
Moderate concern 16.6%
Severe concern 61.3%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
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The story over time

414-416 Warren Dr event timeline

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

2025
Fire Complaint Feb 24
General Hazardous Materials
Condition Corrected

See all 7 events

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

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Every record we have

Full data for 414-416 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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