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527-531 Duboce Ave

Duboce Triangle, SF 94117 3538094 4 units · 3 fl · 1906

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 Duboce Triangle — not a forecast
At or below average
avg 2.3
0
FewerMore

This building has 0 novs (7y), at or below the Duboce Triangle average of 2.3.

Rent & eviction protection

Is 527-531 Duboce 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 1906
2 or more units
4 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 1906
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
Floors3
Year built1906
Total area4,866 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3538094
Ownership

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

Mailing address
105 Bulkley Ave Sausalito CA 94965
Last sale
June 01, 2022

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.

527 Duboce Ave, San Francisco, CA 94117
529 Duboce Ave, San Francisco, CA 94117
531 Duboce Ave, San Francisco, CA 94117
Augrented Insights
Initial analysis

The 4-unit, 3-story apartment building at 527-531 Duboce Avenue, built in 1906, has undergone significant recent improvements, most notably the installation of a solar PV system (8.64 kW) and HVAC system on the roof in 2023, along with electrical panel relocations and upgrades. Recent maintenance has focused on unit improvements and building systems, including a $40,000 kitchen and bath remodel in Unit B (2021), comprehensive electrical upgrades (2021), and plumbing improvements including water heater replacement (2022). The building has a history of proactive maintenance, with major works completed in recent years including window replacements (2015), multiple apartment renovations (2011-2012), and roofing work (2012).

The property has experienced some issues requiring attention, including building violations in 2015 related to weatherproofing and lead paint concerns, though these were abated by May 2015. The most recent complaints have been minor in nature, including street cleaning matters and maintenance of common areas. A documented cooking fire incident with no civilian injuries occurred, though no date is specified. The building's infrastructure has seen substantial upgrades over the years, including an underground service conversion to 150A with 4 meters in 2005, indicating consistent investment in maintaining and upgrading the property. Recent 311 calls primarily relate to exterior and street issues rather than building-specific problems, suggesting overall stability and maintenance of the building systems and units.

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

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Risk rating

How 527-531 Duboce 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

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
66thpercentile

Out of 287 buildings in this neighborhood, 98 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
79%
No DBI
violation
21%
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.

Building age

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

Owner's portfolio size

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

12-Month risk forecast
Low failure risk 21%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

527-531 Duboce Ave apartment reviews

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On the map

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Buildings nearby
8 found
The story over time

527-531 Duboce Ave event timeline

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

2023
Electrical Permit May 11
Pv plan 5222. 24 pv modules, 360 / 1000 watts per module, 8.64 (dc) kw. (must maintain existing fire life safety systems during construction. please notify fire inspector at the start of work 415-554-8927)
Complete
Electrical PermitApr 09
Relocate main panel in garage. install 50-amp circuit to hvac on roof.

See all 7 events

Full history back to 2019 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 527-531 Duboce Ave apartments

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

Side by side

How 527-531 Duboce Ave compares to the neighborhood

This building against comparable properties in Duboce Triangle. Toggle filters to narrow the peer group.

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