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1309 Harrison St

South of Market, SF 94103 3525076 2 units · 2 fl · 1906

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 South of Market
At or below average
avg 3.3
0
FewerMore

This building has 0 novs (7y), at or below the South of Market average of 3.3.

Rent & eviction protection

Is 1309 Harrison 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 1906
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
SLR
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 built1906
Total area
Property typeMulti-Family Residential
Tax statusNone
Blocklot3525076
Ownership

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

Owner name
Knadler Peter G & Gail P Re
Mailing address
Knadler Peter G & Gail P, T 459 Briarwood Dr South San Francisco CA 94080
Last sale
100298

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.

1309 A Harrison St, San Francisco, CA 94103
1309 Harrison St, San Francisco, CA 94103
Augrented Insights
Initial analysis

The two-unit, two-story multi-family residential building at 1309 Harrison Street in the South of Market neighborhood, owned by Peter and Gail Knadler, dates back to 1906. The property underwent significant renovations in late 2014, including a complete electrical rewiring, furnace replacement with new ductwork, window replacements, and plumbing upgrades totaling approximately $84,920. These improvements were part of a comprehensive update to the building's systems. However, the building has experienced recurring fire safety concerns, with violations issued between 2018 and 2023 for issues related to alarm systems, sprinkler systems, combustible materials, and sleeping area requirements. The property has also been subject to multiple fire department responses, though most were for false alarms or non-fire-related incidents, with no civilian injuries reported.

More recently, between late 2024 and early 2025, there have been several 311 calls regarding the vicinity of the building, primarily related to encampments, graffiti, and abandoned items on the street. The property was notably affected by a homelessness-related incident in December 2024. These external issues, while not directly impacting the building's safety systems, may affect the immediate neighborhood environment. The most recent fire safety violation from December 2023 regarding sleeping area requirements remains open as of the latest data review in October 2023.

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

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Risk rating

How 1309 Harrison 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
74th percentile

Out of 430 buildings in this neighborhood, 112 are predicted to be safer.

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

Neighborhood (ZIP code)

The ZIP code captures local housing market and enforcement patterns that affect all buildings in the area.

Neighborhood location

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

Estimated permit spend (past 7 years)

Dollar value of permits pulled at this address — large recent spend can signal deferred-maintenance catch-up.

12-Month severity forecast
No violation 77.0%
Moderate concern 15.4%
Severe concern 7.7%
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

1309 Harrison St event timeline

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

2023
311 Request Aug 04
Parking on sidewalk
Grey - Mercedes C250 - 9CHH858

See all 1 events

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

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Every record we have

Full data for 1309 Harrison 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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