Free SF apartment background check

521-523 Clipper St

Noe Valley, SF 94114 6556025 2 units · 2 fl · 1900

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 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 521-523 Clipper 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 1900
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 built1900
Total area2,054 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot6556025
Ownership

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

Owner name
Geffner-Rodin Green Cabinet
Mailing address
Geffner Samuel L & Rodin Ma 521-523 Clipper St San Francisco CA 94114
Last sale
060706

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.

521 Clipper St, San Francisco, CA 94114
523 Clipper St, San Francisco, CA 94114
Augrented Insights
Initial analysis

The property at 521-523 Clipper Street is a two-unit, two-story multi-family residential building located in Noe Valley, built in 1900 and currently owned by Geffner-rodin Green Cabinet. The building has undergone several significant renovations over the years, with the most recent major update being the installation of a solar panel system (10.4 kW) with 26 modules completed in March 2023. Previous substantial improvements include a comprehensive remodeling project in 2002 involving a new roof dormer and kitchen/bathroom renovations valued at $100,000, and a deck addition at the rear second level in 2004 costing $6,000. The building experienced multiple violations in 2002 related to heating, window repairs, and deck conditions, though these were all abated by January 2004.

Recent concerns regarding the property include a complaint from October 2023 about the removal and conversion of the garage space, which has generated ongoing planning review activity regarding a meditation room structure and parking modifications. The building's electrical systems received a complete rewiring in 2004, and various street space permits have been obtained over the years, including a substantial $100,000 permit in 2003. The property has generated multiple 311 calls in 2023-2024, primarily regarding parking issues, curb defects, and street cleaning matters, though these are generally related to the property's location and not internal building conditions. Current planning records show active discussions regarding parking modifications and an existing rear yard structure, indicating ongoing attention to property improvements and compliance matters.

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

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Risk rating

How 521-523 Clipper 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
17th percentile

Out of 1879 buildings in this neighborhood, 1560 are predicted to be safer.

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

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.

Permit rate, owner's portfolio

Per-building permit rate across the owner's portfolio.

12-Month severity forecast
No violation 43.1%
Moderate concern 38.4%
Severe concern 18.5%
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

521-523 Clipper St event timeline

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

2025
Building Permit Feb 25
Re-roofing: remove and replace roofing material / existing roofing material (in-kind)
$12,000 · Complete

See all 6 events

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

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Every record we have

Full data for 521-523 Clipper 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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