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639-641 Clayton St

Haight Ashbury, SF 94117 1246008 2 units · 2 fl · 1900

Nothing on record for this building in the last seven years, and our model puts it at a low risk of maintenance problems over the next 12 months. No public enforcement record to go on. Walk the building, ask the current tenants how repairs get handled, and get any promises in writing.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Haight Ashbury — not a forecast
At or below average
avg 1.7
0
FewerMore

This building has 0 novs (7y), at or below the Haight Ashbury average of 1.7.

Rent & eviction protection

Is 639-641 Clayton 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
RH3
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 1900
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
Units2
Floors2
Year built1900
Total area3,800 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1246008
Ownership

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

Mailing address
Katherine Seligman & David 641 Clayton St San Francisco CA 94117
Last sale
May 26, 1988

Landlord portfolio

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

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Multiple entrances & addresses

Included addresses

All street addresses sharing this blocklot that are covered by this report.

641 Clayton St, San Francisco, CA 94117
639 Clayton St, San Francisco, CA 94117
Augrented Insights
Initial analysis

The property at 639-641 Clayton Street is a 2-unit, 2-story multi-family residential building constructed in 1900 in the Haight Ashbury neighborhood, currently owned by the Heiden Family Revocable Trust. The building underwent significant permit activity between 2003 and 2012, including major electrical work, bathroom remodeling, and the installation of a fire sprinkler system. Of particular note, there was a serious period of permit complications between 2009-2012 when multiple permits expired, including those for fire sprinklers, a vertical addition, footing replacement, and moment frame shearwalls. This situation led to building violations that were not abated until July 2012, when final inspections were finally completed for several previously unfinalized projects, including multiple electrical upgrades, bathroom renovations, and fire safety improvements.

The building has experienced two documented fire incidents - one CO detector activation and one carbon monoxide incident, neither resulting in civilian injuries. Recent 311 calls from 2022-2024 have primarily related to street cleaning issues, with occurrences of garbage, graffiti (though no graffiti was found in 2024), parking violations, and some waste management concerns. Two rear yard variance requests are on file, one of which was withdrawn, and a potential illegal short-term rental investigation was conducted in 2015 but determined to be for a neighboring property instead.

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

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Risk rating

How 639-641 Clayton 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
73rdpercentile

Out of 581 buildings in this neighborhood, 157 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
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.

Building size

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

Building age

Older buildings tend to have more maintenance challenges; SF's pre-1906 earthquake housing stock carries distinct risk.

Neighborhood location

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

12-Month risk forecast
Low failure risk 20%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

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On the map

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The story over time

639-641 Clayton St event timeline

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

No dated public records on file yet.
Every record we have

Full data for 639-641 Clayton St apartments

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

Side by side

How 639-641 Clayton St compares to the neighborhood

This building against comparable properties in Haight Ashbury. Toggle filters to narrow the peer group.

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

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