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340 Hamilton St

Portola, SF 94134 5988021 4 units · 2 fl · 1963

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

NOVs (7y) vs. neighborhood
Compared to a typical building in Portola
At or below average
avg 1.8
0
FewerMore

This building has 0 novs (7y), at or below the Portola average of 1.8.

Rent & eviction protection

Is 340 Hamilton St 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
4 units
Property type
Multi-Family Residential
Zoning
RH1
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
Units4
Floors2
Year built1963
Total area3,938 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot5988021
Ownership

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

Owner name
Jackson Helen
Mailing address
2580 Wexford Ave South San Francisco CA 94080
Last sale
121912

Landlord portfolio

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

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Augrented Insights
Initial analysis

The four-unit, two-story apartment building at 340 Hamilton Street in Portola, owned by Helen Jackson and constructed in 1963, has experienced several significant maintenance and safety-related events over its history. Most notably, there have been recurring issues with water intrusion and structural problems, particularly with the front deck and stairs. In 2017-2018, major work was performed on the exit stairs to restore them to original construction standards, including the addition of steel columns for support, at a cost of $50,000. Multiple complaints in 2006 documented serious maintenance issues, including dry rot, water damage, and mold problems that prompted violation notices, though these were eventually abated. The building has undergone various system upgrades, including a furnace replacement in 2023 and multiple water heater replacements (most recently attempted in 2023). Recent inspections have shown fewer violations, though a pavement defect was reported nearby in April 2024.

The property has a history of addressing maintenance issues, with all historical building violations and complaints eventually being marked as "Not Active." Past improvements included window replacements in 2012 (four vinyl windows installed) and roofing work in 2000. While there have been several routine inspections and a few non-building-related complaints (mostly regarding parking issues in the vicinity), the property has maintained compliance with building codes since addressing the 2006-2007 violations. The most recent building permit activity, from 2017-2018, focused primarily on stairway safety improvements, suggesting more recent concerns have been handled through regular maintenance rather than major structural changes.

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

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Risk rating

How 340 Hamilton St'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 255 buildings in this neighborhood, 214 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
51%
No DBI
violation
49%
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.

DBI tenant complaints (past 7 years)

Formal complaints tenants filed with DBI about this building over 7 years.

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 26.2%
Moderate concern 40.9%
Severe concern 32.8%
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

340 Hamilton St event timeline

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

2025
Building Permit Feb 18
Reroofing: flat roof torchdown, tear off like for like. first story only, not touching the rest of the building.
$4,000 · Complete

See all 4 events

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

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Every record we have

Full data for 340 Hamilton St 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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