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847-851 Lombard St

Russian Hill, SF 94133 0073018A 3 units · 3 fl · 1917

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 Russian Hill
At or below average
avg 1.9
1
FewerMore

This building has 1 novs (7y), at or below the Russian Hill average of 1.9.

Rent & eviction protection

Is 847-851 Lombard 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 1917
2 or more units
3 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
Units3
Floors3
Year built1917
Total area4,695 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot0073018A
Ownership

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

Owner name
Ahn Leah
Mailing address
847 Lombard St San Francisco CA 94133
Last sale
052810

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.

847 Lombard St, San Francisco, CA 94133
849 Lombard St, San Francisco, CA 94133
851 Lombard St, San Francisco, CA 94133
Augrented Insights
Initial analysis

The three-story multi-family residential building at 847-851 Lombard Street in Russian Hill, owned by Leah Ahn, was built in 1917 and contains three units. The building has undergone significant maintenance and upgrades over the years, with major electrical work completed in 2004-2007, including a complete rewiring of the flat, installation of new panels, and addition of various electrical fixtures. A fire sprinkler system was installed in the garage in 2008, followed by various maintenance works including roof access modifications in 2015.

The building has experienced several concerning issues, particularly relating to paint and safety compliance. In 2016, there were violations regarding peeling paint and potential lead hazards, though these were abated by 2018. A 2015 violation involved unpermitted construction of a roof deck and alteration of a roof hatch, which was addressed through subsequent permits. The property has had recurring plumbing issues, with multiple sewage backup incidents reported between 2015 and 2024, most recently in October 2024. While there was one documented cooking fire incident (involving a confined container) on record with no civilian injuries, it appears to have been an isolated occurrence. The building's maintenance history shows regular attention to infrastructure, though the pattern of lead hazard citations and plumbing issues suggests ongoing concerns that have required multiple interventions over the years.

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

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Risk rating

How 847-851 Lombard 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
41th percentile

Out of 1133 buildings in this neighborhood, 668 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
69%
No DBI
violation
31%
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.

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 52.1%
Moderate concern 28.4%
Severe concern 19.6%
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

847-851 Lombard St event timeline

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

2026
Plumbing Permit Mar 30
To comply with nov 202650997: legalize installation from previous company of furnace.
Complete
Plumbing PermitMar 02
To comply with nov# 202650997: item #1-repair and strapping 15 ft of 2" broken pipe on back wall facing backyard dmv pipe.

See all 6 events

Full history back to 2026 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 847-851 Lombard St apartments

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

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