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1820-1822 Filbert St

Cow Hollow, SF 94123 0519011 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 Cow Hollow — not a forecast
At or below average
avg 0.7
0
FewerMore

This building has 0 novs (7y), at or below the Cow Hollow average of 0.7.

Rent & eviction protection

Is 1820-1822 Filbert 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.

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 area3,997 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot0519011
Ownership

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

Owner name
Mailing address
Po Box 470880 San Francisco CA 94147
Last sale
March 22, 2002

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.

1820 Filbert St, San Francisco, CA 94123
1822 Filbert St, San Francisco, CA 94123
Augrented Insights
Initial analysis

The two-unit residential building at 1820-1822 Filbert Street in Cow Hollow, owned by Eric R. Mathewson, is a two-story flats and duplex structure built in 1900. The property underwent significant renovations and upgrades between 2005 and 2010, including a major seismic upgrade that began in late 2005, installation of fire sprinklers throughout the building in 2007, complete rewiring of both units with new electrical systems, and comprehensive plumbing work including bathroom and kitchen remodels, laundry facilities, and radiant heating installation. The renovation period also saw the addition of multiple fireplaces (two in January 2008) and a new air conditioning unit installation. Several building permits from 2010 relate to obtaining final inspections for previously approved work, indicating that much of the construction was completed by this time.

While the major renovation work appears to have been properly completed and inspected, there were some procedural issues noted during the renovation period, including a complaint filed in December 2005 regarding foundation work commencing without a valid building permit, though this violation was ultimately abated in July 2012. The property also experienced some planning activity regarding a proposed one-story addition and rear addition with enclosed porches, which went through various approval stages and ultimately received approval, though earlier appeals were denied. More recently, there have been several routine municipal service calls in the vicinity, primarily related to parking enforcement and street cleaning, with the most recent activity being general cleaning in March 2023. The building's documented history suggests that it has been well-maintained since completing its major renovations, with no significant building code violations or safety concerns reported in recent years.

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

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Risk rating

How 1820-1822 Filbert 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
80thpercentile

Out of 861 buildings in this neighborhood, 172 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
87%
No DBI
violation
13%
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 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.

Construction spend, owner's portfolio

Estimated permit value across all of this owner's buildings.

12-Month risk forecast
Low failure risk 13%
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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8 found
The story over time

1820-1822 Filbert St event timeline

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

2026
311 Request Jun 29
Blocking driveway cite tow
Parking Enforcement

See all 5 events

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

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Every record we have

Full data for 1820-1822 Filbert St apartments

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

Side by side

How 1820-1822 Filbert St compares to the neighborhood

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