Free SF apartment background check

640-646 Douglass St

Noe Valley, SF 94114 2775008 4 units · 2 fl · 1904

Nothing on record for this building in the last seven years. Our model still sees a moderate chance of maintenance problems in the next 12 months, from the owner's wider portfolio and the surrounding area rather than from anything recorded here. 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 Noe Valley — not a forecast
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.

The bar and the rating point different ways because they measure different things: the bar counts DBI violations already on file, the rating forecasts the next 12 months.

Rent & eviction protection

Is 640-646 Douglass 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 1904
2 or more units
4 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 1904
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
Units4
Floors2
Year built1904
Total area2,650 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot2775008
Ownership

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

Mailing address
C/o Vertex Property Group 2443 Fillmore St #271 San Francisco CA 94115
Last sale
—

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.

640 Douglass St, San Francisco, CA 94114
644 Douglass St, San Francisco, CA 94114
646 Douglass St, San Francisco, CA 94114
642 Douglass St, San Francisco, CA 94114
Augrented Insights
Initial analysis

The property at 640-646 Douglass St is a two-story, four-unit multi-family residential building located in Noe Valley, built in 1904 and currently owned by Richard Carpeneti Trustee. The building has experienced several significant maintenance and safety issues over its history, with the most recent being multiple fire code violations documented in November 2024, related to alarm systems and sprinkler service requirements. This follows a pattern of fire safety concerns, with similar violations recorded in September 2023, 2020, 2019, and 2009. The building is currently undergoing reroofing work, with permits issued in January 2025 for shingle replacement at a cost of $16,500, following previous roofing work completed in 1997 and another roofing permit from 2025.

The property has a documented history of building safety and maintenance issues, including multiple violations and repair requirements identified during routine inspections in 2001 and 2011, which included concerns about lead paint hazards, staircase repairs, handrail repairs, and security improvements. A notable tenant buyout occurred in August 2017 at 644 Douglass Street, involving two tenants and totaling $3,550. The building's maintenance record shows consistent attention to infrastructure updates, though the recurring fire code violations suggest ongoing challenges with fire safety compliance. Recent 311 calls from the last year primarily relate to street-level maintenance issues outside the building, including garbage and debris concerns, and parking-related complaints.

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

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Risk rating

How 640-646 Douglass 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
23rdpercentile

Out of 1879 buildings in this neighborhood, 1447 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
61%
No DBI
violation
39%
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.

Number of units

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

Neighborhood location

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

Estimated permit spend (past 7 years)

Dollar value of permits pulled at this address — large recent spend can signal deferred-maintenance catch-up.

12-Month risk forecast
Moderate failure risk 39%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

640-646 Douglass St apartment reviews

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On the map

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8 found
The story over time

640-646 Douglass St event timeline

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

2026
311 Request Jul 22
Cloudy milky appearance
residence
311 RequestMar 18
Overgrown tree

See all 7 events

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

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Every record we have

Full data for 640-646 Douglass St apartments

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

Side by side

How 640-646 Douglass St compares to the neighborhood

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