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840-842 Union St

Russian Hill, SF 94133 0100043 2 units · 2 fl · 1959

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NOVs (7y) vs. neighborhood

Compared to a typical building in Russian Hill

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FewerMore

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12-Month Maintenance Forecast

?%

(risk — lower is better)

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Estimated probability of a DBI violation or complaint in the next 12 months.

7-YEAR TREND —

7-Year Historical Counts

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NOVs (7y)

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DBI Complaints (7y)

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311 Calls (7y)

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Fire Incidents

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2nd NOVs

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Dir. Hearings

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City Atty

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Permits (7y)

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Rent & eviction protection

Is 840-842 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 1959

2 or more units

2 units

Property type

Multi-Family Residential

Zoning

RM1

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

Units	2
Floors	2
Year built	1959
Total area	2,257 sq ft
Property type	Multi-Family Residential
Tax status	None
Blocklot	0100043

Ownership

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

Owner name

OWNER NAME LLC

Mailing address

123 Hidden Street, CA 00000

Last sale

051017

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.

840 Union St, San Francisco, CA 94133

842 Union St, San Francisco, CA 94133

Augrented Insights

AI summary

The two-unit residential building at 840-842 Union Street in Russian Hill is a two-story flats and duplex structure built in 1959, currently owned by Brent M. Gullixson. The property has undergone several significant improvements and maintenance work since 2016, with the most substantial being a comprehensive plumbing system upgrade including new underground sewer, domestic water piping, and gas lines, along with the installation of radiant heat boilers and a complete electrical rewiring. In late 2016, a roof deck expansion project was permitted costing $8,540. Between 2016 and 2020, multiple plumbing and electrical improvements were completed, including the installation of shower pans, bar sink plumbing, electrical receptacles, lights, and switches.

The building has had several street space permits issued between 2016 and 2018, with consistent activity suggesting regular maintenance or construction-related needs. The property has experienced minimal issues, with only two 311 calls recorded: one regarding a blocked driveway (resolved by parking enforcement) and another concerning an abandoned vehicle (towed) from 2014, though this was unrelated to the building itself. Planning records show various proposed improvements, including a rear yard staircase replacement and a partial fourth floor addition, though some of these applications were withdrawn or cancelled. The building's maintenance record indicates regular upkeep and systematic improvements to its infrastructure, particularly between 2016 and 2018, with all major permits marked as completed.

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Risk rating

How 840-842 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

95th percentile

Out of 1133 buildings in this neighborhood, 57 are predicted to be safer.

RiskiestSafest

Predicted 12-month outcome

93%

No DBI
violation

7%

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.

Neighborhood location

Precise location is a proxy for neighborhood-level risk — some SF blocks have systematically higher DBI activity.

Building age

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

Construction spend, owner's portfolio

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

12-Month severity forecast

No violation 78.6%

Moderate concern 8.9%

Severe concern 12.5%

Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.

Apartment reviews

840-842 Union St apartment reviews

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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning