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31-35 Frederick St

Buena Vista Park/Ashbury Heights, SF 94117 2603011A 3 units · 2 fl · 1928

A handful of records on file over the last seven years, and our model puts this building at a low risk of further maintenance problems in the next 12 months. A few records worth reading before you sign. Check whether they were closed out, and ask what was actually fixed.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Buena Vista Park/Ashbury Heights — not a forecast
At or below average
avg 1.6
0
FewerMore

This building has 0 novs (7y), at or below the Buena Vista Park/Ashbury Heights average of 1.6.

Rent & eviction protection

Is 31-35 Frederick 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 1928
2 or more units
3 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 1928
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
Units3
Floors2
Year built1928
Total area2,396 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot2603011A
Ownership

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

Mailing address
William A Werner, Trustee 213 Richardson St Sausalito CA 94965
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.

35 Frederick St, San Francisco, CA 94117
31 Frederick St, San Francisco, CA 94117
33 Frederick St, San Francisco, CA 94117
Augrented Insights
Initial analysis

The property at 31-35 Frederick Street is a two-story, three-unit multi-family residential building located in the Buena Vista Park neighborhood. Built in 1928 and currently owned by the William A Werner Revocable Trust, the building has undergone several significant maintenance and upgrade projects over the years. Most recently, in 2021, four non-street-facing windows were replaced with wood composite units at a cost of $13,269. A major systems upgrade was completed in 2016 with the installation of a new heating system and backflow prevention assembly for all three units.

The building has experienced two routine housing inspections by Housing Inspection Services, one in 2003 and another in 2017, which revealed several fire safety issues that were subsequently addressed. The 2017 inspection resulted in violations related to fire proofing, which was abated by August 15, 2017. The 2003 routine inspection led to multiple fire safety violations including problems with egress obstruction, fire extinguisher charging, combustible storage, and garbage receptacle placement, all of which were resolved by February 2004. More recent municipal records show multiple parking-related issues in the surrounding area, with several reports of vehicles blocking driveways or parking on sidewalks between January and October 2024. Additionally, there are two open cases from March 2024 regarding structural maintenance issues in the adjacent park area, specifically related to graffiti. While these parking and park maintenance issues are not directly related to the building's condition, they provide context about the immediate neighborhood's current concerns.

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

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Risk rating

How 31-35 Frederick 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
45thpercentile

Out of 351 buildings in this neighborhood, 193 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
75%
No DBI
violation
25%
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 age

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

Building permits, owner's portfolio

Permits pulled across all of this owner's buildings over 7 years.

12-Month risk forecast
Low failure risk 25%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

31-35 Frederick St apartment reviews

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On the map

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The story over time

31-35 Frederick St event timeline

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

2026
311 Request Jun 27
Blocking driveway cite tow
Parking Enforcement
311 RequestJun 01
Blocking driveway cite tow

See all 10 events

Full history back to 2021 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 31-35 Frederick St apartments

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

Side by side

How 31-35 Frederick St compares to the neighborhood

This building against comparable properties in Buena Vista Park/Ashbury Heights. 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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