Free SF apartment background check

515-519 Duboce Ave

Duboce Triangle, SF 94117 3538096 3 units · 3 fl · 1900

This building has a higher-than-average number of open problems nearby. Few open issues; problems get fixed quickly. A reasonable bet for a smooth tenancy.

NOVs (7y) vs. neighborhood
Compared to a typical building in Duboce Triangle
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 515-519 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 1900
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.

Building characteristics
Units3
Floors3
Year built1900
Total area3,678 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3538096
Ownership

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

Owner name
Lahiri Supratik
Mailing address
517 Duboce Ave San Francisco CA 94117
Last sale
040521

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.

519 Duboce Ave, San Francisco, CA 94117
517 Duboce Ave, San Francisco, CA 94117
515 Duboce Ave, San Francisco, CA 94117
Augrented Insights
Initial analysis

The three-unit residential building at 515-519 Duboce Avenue in the Duboce Triangle neighborhood, owned by Supratik Lahiri and constructed in 1900, has undergone substantial improvements and renovations over recent years, with significant attention to modernization and safety upgrades. Most recently, in February 2023, the property received new shower installations and water heater upgrades across all three units. In late 2022, the building enhanced its safety features with a comprehensive expansion of the fire sprinkler system, adding 36 new sprinklers and relocating existing ones at a cost of $20,000. The building underwent major interior renovations in 2021, including kitchen and bathroom relocations, window enlargements, and electrical upgrades, followed by the installation of three Tesla Powerwall units and solar panels in 2023 with an investment of $28,000, demonstrating commitment to sustainability.

The property has seen consistent infrastructure improvements, including a 400-amp electrical service upgrade in 2022, installation of new heat pump systems, and comprehensive plumbing updates. Earlier maintenance addressed structural issues, such as dry rot repairs completed in 2022, and the building's fire safety systems have been systematically improved since 2014, when a new fire sprinkler system was first installed. The building's management has maintained a proactive approach to maintenance and upgrades, with all recent permits showing proper completion status. While there have been multiple 311 calls regarding parking enforcement and illegal postings in the vicinity of the building between 2020 and 2024, these are external to the property itself and have been appropriately resolved through municipal channels.

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

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Risk rating

How 515-519 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

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
89th percentile

Out of 287 buildings in this neighborhood, 32 are predicted to be safer.

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.

Property class: single-family home

Single-family homes (class A) have distinct violation and complaint patterns from multi-family buildings.

12-Month severity forecast
No violation 74.7%
Moderate concern 21.0%
Severe concern 4.2%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

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The story over time

515-519 Duboce Ave event timeline

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

2026
Building Permit Mar 31
To obtain final inspection for work approved under pa# 202106162614. all work is complete.
$1 · Complete
Building PermitMar 31
To obtain final inspection for work approved under pa# 202107214843, 202206297417, and 202302232476. all work is complete.

See all 17 events

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

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Every record we have

Full data for 515-519 Duboce 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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