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660 Clipper St

Noe Valley, SF 94114 6544021 24 units · 3 fl · 1964

This building has a substantial enforcement record over the last seven years, and our model predicts continuing maintenance failures over the next 12 months. Read the records below before you sign. Ask which issues were resolved, get repair commitments in writing, and inspect the unit yourself.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Noe Valley — not a forecast
Above average
avg 1.2
7
FewerMore

This building has 7 novs (7y), above the Noe Valley average of 1.2.

Rent & eviction protection

Is 660 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 1964
2 or more units
24 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.

Statewide backstop · AB 1482

California Tenant Protection Act of 2019

Even when a building isn't covered by local rent stabilization, the statewide Tenant Protection Act (AB 1482) may still apply. It caps annual rent increases and requires the landlord to state a legal reason to end most tenancies.

15+ years since occupancy
Built 1964
Annual rent increase cap
5% + CPI, max 10%
Just-cause eviction
After 12 months
Local rent control likely takes priority. This building appears to fall under the local ordinance above, which is stronger than AB 1482. Where a local just-cause ordinance applies, its rules govern instead of the state cap.

AB 1482 does not apply to single-family homes and condos unless owned by a corporation, REIT, or an LLC with a corporate member; to owner-occupied duplexes; or to deed-restricted affordable housing. The Act is in effect until January 1, 2030. Not legal advice — see the California landlord–tenant guide.

Building characteristics
Units24
Floors3
Year built1964
Total area17,177 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot6544021
Ownership

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

Mailing address
Steven C. Thrower 1 Bush St Ste 900 San Francisco CA 94104
Last sale
December 09, 2014

Landlord portfolio

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

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Augrented Insights
Initial analysis

The 24-unit, 3-story apartment building at 660 Clipper Street in Noe Valley, built in 1964, has undergone significant recent improvements, including the installation of new ADUs (Accessory Dwelling Units) at ground level (issued in 2020) and various unit renovations between 2015-2022. Recent maintenance work includes the installation of washer/dryer units in multiple apartments, kitchen and bathroom rehabilitations, and electrical system upgrades. The building has completed its soft-story seismic retrofit requirements, achieving Tier 2 compliance. Fire safety has been a recurring focus, with recent fire violations in 2023 regarding sleeping area requirements, though this was subsequently abated. The building has maintained active compliance with building codes, including a fire alarm upgrade in 2019 to meet current standards.

Historical records show earlier challenges in 2004-2005 when multiple fire safety violations were addressed, including issues with garbage disposal locations, lead paint hazards, and security concerns, all of which were resolved. More recent historical complaints from 1997 regarding unauthorized construction noise and 2009 concerning unpermitted work have been closed. The building's maintenance history demonstrates ongoing investment in unit improvements and safety systems, though there have been periodic issues requiring correction, including recent fire safety concerns. Regular inspections and permits indicate active management and compliance with building codes. Recent 311 calls primarily relate to street cleaning and public space maintenance rather than building-specific issues.

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

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Risk rating

How 660 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

Lower risk — safer than most nearby

DBI rarely finds violations here. Strong maintenance history and a clean complaint record.

Typical — about average for the neighborhood

Some past violations or complaints on record. Worth asking the landlord about any open issues before signing.

Higher risk — riskier than most nearby

Elevated violation and complaint history. DBI has found issues here before and is statistically likely to again.

Neighborhood percentile
5thpercentile

Out of 1879 buildings in this neighborhood, 1785 are predicted to be safer. The band is relative to this neighborhood, so a share of every neighborhood falls in each colour.

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.

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.

NOV rate, owner's portfolio

Per-building NOV rate across everything this owner manages — high rates signal pattern neglect.

12-Month risk forecast
High failure risk 62%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

660 Clipper St apartment reviews

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On the map

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The story over time

660 Clipper St event timeline

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

2026
311 Request Jul 15
Public utilities commission
billing request for service
Plumbing PermitMar 25
Work category: 1p; replacement of tankless water heater

See all 26 events

Full history back to 2020 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 660 Clipper St apartments

13 SF public datasets for this parcel — permits, violations, complaints, fire records, 311 calls, planning records, and buyouts.

Side by side

How 660 Clipper St compares to the neighborhood

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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

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