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2480 Union St

Cow Hollow, SF 94123 0536017 2 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 Cow Hollow
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 2480 Union 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.

Building characteristics
Units2
Floors3
Year built1900
Total area5,000 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot0536017
Ownership

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

Owner name
Borgonovo Survivors Tr
Mailing address
Roberta F Borgonovo, Tte 2480 Union St San Francisco CA 94123
Last sale
000000

Landlord portfolio

Other SF properties this owner holds, with risk grades for each.

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Augrented Insights
Initial analysis

The two-unit, three-story residential building at 2480 Union Street in Cow Hollow was constructed in 1900 and is currently owned by the Borgonovo Survivors Trust. The property has undergone several significant improvements over the years, including a complete reroofing project in 2011 costing $18,920, installation of new aluminum railings and front porch improvements in 1984, and a gas line installation for a clothes dryer in 2019. Earlier renovations included kitchen remodeling in 1989 and another reroofing project in 1988. The building's heating system underwent modernization in 2011 with the installation of PEX tubing for space heating, though this permit was eventually marked as expired.

The property has experienced recurring issues with illegal parking in the vicinity, particularly in 2024, with multiple incidents of vehicles blocking driveways, parking on sidewalks, and other unauthorized parking, resulting in several citations being issued by parking enforcement. Notably, there were two fire-related incidents recorded: a malfunctioning alarm system activation and a smoke detector activation, neither resulting in civilian injuries. The building's permit history shows regular maintenance and infrastructure improvements, though there is one expired plumbing permit from 2011 related to space heating installation which may indicate incomplete project follow-through.

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

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Risk rating

How 2480 Union 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

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
86th percentile

Out of 861 buildings in this neighborhood, 121 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
88%
No DBI
violation
12%
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.

Owner's portfolio size

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

Estimated permit spend (past 7 years)

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

12-Month severity forecast
No violation 83.4%
Moderate concern 10.7%
Severe concern 5.9%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

2480 Union St apartment reviews

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The story over time

2480 Union St event timeline

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

2019
Plumbing Permit Oct 29
Work category: 1p; running a gas line from existing meter to clothes dryer
Complete

See all 1 events

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

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Every record we have

Full data for 2480 Union St 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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