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644-646 27Th Ave

Central Richmond, SF 94121 1569027 3 units · 3 fl · 1926

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 Central Richmond
At or below average
avg 0.5
0
FewerMore

This building has 0 novs (7y), at or below the Central Richmond average of 0.5.

Rent & eviction protection

Is 644-646 27Th Ave 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 1926
2 or more units
3 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
Units3
Floors3
Year built1926
Total area5,800 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1569027
Ownership

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

Owner name
Joe William & Stacy L Revoc
Mailing address
William O & Stacy L Joe Tru 646 27Th Ave San Francisco CA 94121
Last sale
000000

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.

644 27th Ave, San Francisco, CA 94121
646 27th Ave, San Francisco, CA 94121
Augrented Insights
Initial analysis

The three-unit, three-story multi-family residential building at 644-646 27th Avenue in the Central Richmond neighborhood, owned by Joe William & Stacy L Revoc, has a history dating back to 1926. The most recent significant building improvement occurred in 2015, when fiber-cement siding was added to the south wall at a cost of $4,800. A major renovation took place in 2010, involving a kitchen remodel on the second floor with accompanying electrical and plumbing work, including high-efficiency lighting installation, new cabinets, and sink installation, costing $9,500. The building's infrastructure has been maintained through various updates, including a roofing project in 1989 and a code compliance update in 1984.

The building had a cluster of building and safety violations in May 2002 related to stair repairs, smoke detector installations, and fire extinguisher requirements, all of which were promptly addressed and abated by September 2002. Two routine housing inspections were conducted in 2002 and 2011, with no active violations recorded. While there have been multiple 311 calls regarding parking issues in the area between 2020 and 2024, these are exterior to the building itself and primarily involve vehicles blocking driveways or parking on sidewalks. A single service call was recorded by the fire department with no civilian injuries reported. The building's record shows regular maintenance and compliance with safety requirements, with no recent violations or safety concerns noted.

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

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Risk rating

How 644-646 27Th Ave'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
20th percentile

Out of 2250 buildings in this neighborhood, 1800 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
73%
No DBI
violation
27%
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.

Estimated permit spend (past 7 years)

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

Building size

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

Owner's portfolio size

Number of SF parcels this owner is registered on — larger portfolios have distinct risk patterns.

12-Month severity forecast
No violation 75.1%
Moderate concern 18.3%
Severe concern 6.7%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
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The story over time

644-646 27Th Ave 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 644-646 27Th Ave 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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