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4256 23Rd St

Noe Valley, SF 94114 2773012 2 units · 2 fl · 1907

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 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 4256 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 1907
2 or more units
2 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
Units2
Floors2
Year built1907
Total area3,278 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot2773012
Ownership

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

Owner name
Carl W & Laura A Friedman T
Mailing address
Friedman Laura A Trustee 4256 23Rd St San Francisco CA 94114
Last sale
091714

Landlord portfolio

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

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Augrented Insights
Initial analysis

The two-unit, two-story multi-family residential building at 4256 23rd Street in Noe Valley, owned by Carl W & Laura A Friedman, has undergone significant improvements since its 1907 construction. The most substantial renovation occurred between 2009-2010, when a comprehensive horizontal addition was completed at a cost of $250,000, adding approximately 1,000 square feet including a master bedroom suite, study, laundry facilities, two bedrooms, kitchen, and roof deck. This project also involved extensive updates including window relocations, new exterior stairs, and comprehensive plumbing and electrical upgrades, with the installation of new 150-amp service, three sub-panels, and complete rewiring. Historical records show earlier improvements including multiple window replacements (2005), bathroom and kitchen renovations (1997), roofing work (1997, 2005), and a comprehensive remodeling of various interior spaces (1985).

Recent maintenance and safety issues have emerged in the vicinity of the property, particularly regarding sidewalk access. Numerous citations for sidewalk parking violations were issued in late 2023 through early 2024, with at least two resulting in citations. There are also ongoing concerns with street maintenance, as evidenced by multiple reports of garbage and debris between April 2023 and February 2024, though most of these cases have been resolved. A tree-related safety concern was reported in July 2023 regarding lifted sidewalk roots, which remains open. The most recent building maintenance records indicate no major structural or system issues since the extensive 2009-2010 renovations, and all permitted work was completed successfully. However, the concentration of recent 311 calls regarding parking and street cleaning suggests there may be ongoing challenges with neighborhood maintenance and access around the property's location.

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

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Risk rating

How 4256 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
56th percentile

Out of 1879 buildings in this neighborhood, 827 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
80%
No DBI
violation
20%
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 location

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

Neighborhood (ZIP code)

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

Building permits, owner's portfolio

Permits pulled across all of this owner's buildings over 7 years.

12-Month severity forecast
No violation 55.5%
Moderate concern 19.3%
Severe concern 25.2%
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

4256 23Rd St event timeline

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

2026
311 Request Jun 04
Other illegal parking
Parking Enforcement
311 RequestMar 26
Sidewalk defect

See all 4 events

Full history back to 2025 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 4256 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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