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4300-4308 23Rd St

Noe Valley, SF 94114 2802009 6 units · 3 fl · 1911

This building has far more open problems than almost any other in the neighborhood. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood
Compared to a typical building in Noe Valley
At or below average
avg 1.2
1
FewerMore

This building has 1 novs (7y), at or below the Noe Valley average of 1.2.

Rent & eviction protection

Is 4300-4308 23Rd 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 1911
2 or more units
6 units
Property type
Multi-Family Residential
Zoning
RH2
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
Units6
Floors3
Year built1911
Total area6,095 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot2802009
Ownership

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

Owner name
Horwitz Marital Trust
Mailing address
Horwitz Georgiana T Trustee 120 Laidley St San Francisco CA 94131
Last sale
122496

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.

4308 23rd St, San Francisco, CA 94114
4302 23rd St, San Francisco, CA 94114
4300 23rd St, San Francisco, CA 94114
4304 23rd St, San Francisco, CA 94114
4306 23rd St, San Francisco, CA 94114
Augrented Insights
Initial analysis

The 6-unit, 3-story multi-family residential building at 4300-4308 23rd Street in Noe Valley, owned by Horwitz Marital Trust, was constructed in 1911 and has experienced several significant events throughout its history. Most notably, the building suffered fire damage in 2015 when an electrical short affected the ground floor grocery store, prompting extensive repairs and system replacements, including a new sprinkler system installation in 2017-2019. The property has undergone mandatory soft-story seismic retrofitting as a Tier 3 building, with work completed and Certificate of Final Completion issued, though there was a complaint filed in 2020 regarding initial non-compliance. Recent improvements include a completed bathroom remodel in November 2023 and final inspection approvals in September 2023. The building's safety systems have been actively maintained, with a like-for-like fire system replacement in 2019 and regular fire alarm system monitoring.

The property has maintained compliance with most building codes since addressing multiple violations in 2002 related to electrical systems, smoke detection, and fire safety, all of which were abated. Minor electrical issues, including several instances of alarm system malfunctions and smoke detector activations (none resulting in injuries or fires), have been documented in recent years. Infrastructure improvements include plumbing upgrades, such as new gas lines installation in 2020, and various street space permits in 2018-2019. Regular maintenance and prompt attention to repairs suggest active property management, though there have been occasional reports of garbage and parking issues in the vicinity as documented through 311 calls, all of which were resolved.

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

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Risk rating

How 4300-4308 23Rd 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
5th percentile

Out of 1879 buildings in this neighborhood, 1785 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.

DBI tenant complaints (past 7 years)

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

Building size

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

12-Month severity forecast
No violation 42.2%
Moderate concern 39.1%
Severe concern 18.7%
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

4300-4308 23Rd St event timeline

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

2025
311 Request Nov 06
No parking
defaced ok
Building PermitOct 06
Upgrade (e) fire alarm system in partly sprinkled bldg. to comply with sffc sec 1103.7.6.1 and current cbc/cfc 2022 and nfpa 72 2022 code requirements. install new facu with radio to monitor system. horn/strobe, detectors, and pull stations in common area and exits. monitor sprinkler system.

See all 17 events

Full history back to 2019 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 4300-4308 23Rd 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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