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3550 23Rd St

Noe Valley, SF 94110 3634012 8 units · 2 fl · 1958

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
0
FewerMore

This building has 0 novs (7y), at or below the Noe Valley average of 1.2.

Rent & eviction protection

Is 3550 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 1958
2 or more units
8 units
Property type
Multi-Family Residential
Zoning
RM1
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
Units8
Floors2
Year built1958
Total area7,530 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3634012
Ownership

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

Owner name
Alexanderson Family 2001 Tr
Mailing address
Eric & Linnea Alexanderson, 264 Fair Oaks St San Francisco CA 94110
Last sale
072111

Landlord portfolio

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

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Augrented Insights
Initial analysis

Located in Noe Valley, 3550 23rd Street is a two-story, 8-unit, multi-family residential building constructed in 1958, currently owned by the Alexanderson Family 2001 Trust. The property has undergone several significant safety upgrades over the years, most notably a 2021 fire alarm system upgrade valued at $23,450 to comply with current San Francisco Fire Department requirements, and seismic retrofitting completed in 2016 at a cost of $65,000 as part of the city's Soft Story Program. Historical maintenance records show consistent attention to building upkeep, including window replacements in 2010, roof work in 2001, and multiple repairs to address dry rot issues in 2006 and 2009.

The building has experienced periodic inspection and compliance issues, particularly in 2008 when multiple violations were documented, including problems with fire safety equipment, damaged ceilings, floor coverings, and interior surfaces. These violations were all resolved by November 2008. More recent concerns were raised in a 2019 complaint regarding fire safety and electrical systems, specifically mentioning blocked emergency exits and overloaded circuits, though these complaints were marked as not active. The property has maintained its soft-story retrofit status as work complete with a Certificate of Final Completion issued. Recent activity at the property has primarily consisted of parking-related issues, with multiple citations issued between 2020 and 2024 for vehicles blocking driveways, though these are not directly related to building conditions. The building's maintenance history shows regular upkeep and compliance with major safety requirements, with no active violations or complaints as of the latest available data from 2023.

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

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Risk rating

How 3550 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
9th percentile

Out of 1879 buildings in this neighborhood, 1710 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
44%
No DBI
violation
56%
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.

Building size

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

Number of units

The number of units affects how the model reads complaint and violation totals — more units means more potential sources.

Neighborhood (ZIP code)

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

12-Month severity forecast
No violation 43.5%
Moderate concern 28.3%
Severe concern 28.2%
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

3550 23Rd St event timeline

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

2026
311 Request May 04
Blocking driveway cite tow
Parking Enforcement
311 RequestMay 04
Park patrol

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 3550 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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