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1137-1139 Potrero Ave

Inner Mission, SF 94110 4212007 2 units · 2 fl · 1908

This building has significantly more problems than most nearby buildings. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood
Compared to a typical building in Inner Mission
At or below average
avg 2.6
1
FewerMore

This building has 1 novs (7y), at or below the Inner Mission average of 2.6.

Rent & eviction protection

Is 1137-1139 Potrero 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 1908
2 or more units
2 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
Units2
Floors2
Year built1908
Total area2,760 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot4212007
Ownership

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

Owner name
Tharp Carl
Mailing address
1139 Potrero Ave San Francisco CA 94110
Last sale
112515

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.

1137 Potrero Ave, San Francisco, CA 94110
1139 Potrero Ave, San Francisco, CA 94110
1137 A Potrero Ave, San Francisco, CA 94110
Augrented Insights
Initial analysis

The property at 1137-1139 Potrero Avenue in the Inner Mission neighborhood is a two-story, two-unit multi-family residential building built in 1908, currently owned by Carl Tharp. The building has undergone significant improvements in recent years, including the addition of a ground-floor accessory dwelling unit (ADU) in 2019-2020, complete with two bedrooms, two bathrooms, living room, kitchen, and a new NFPA 13 fire sprinkler system. Major safety upgrades were implemented in 2019 with voluntary seismic retrofitting completed at a cost of $60,000. The building has received consistent maintenance and modernization work, including two complete roof replacements (2015 and 2024), kitchen and bathroom remodeling in both units, heating system upgrades, and extensive electrical system improvements.

The property has experienced numerous graffiti incidents and other public cleanliness issues in 2024, particularly affecting the sidewalk and street areas around the building, with most cases being resolved through city services. A tenant buyout was recorded in June 2024 for $61,823.38 involving two tenants at the adjacent address (1131 Potrero Avenue), though this is not directly related to the subject property. Recent improvements include a new address assignment for the ADU completed in April 2024 and the installation of new utilities and systems to support the building's modernized infrastructure.

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

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Risk rating

How 1137-1139 Potrero 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
13th percentile

Out of 2380 buildings in this neighborhood, 2071 are predicted to be safer.

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

Neighborhood location

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

NOV rate, owner's portfolio

Per-building NOV rate across everything this owner manages — high rates signal pattern neglect.

12-Month severity forecast
No violation 38.0%
Moderate concern 56.7%
Severe concern 5.3%
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

1137-1139 Potrero Ave event timeline

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

2026
Building Permit May 08
To comply with nov 20260235: minor stair repairs front stairs and back stairs, street facing, less than 50%.
$100 · Complete
DBI ComplaintFeb 25
Peeling paint

See all 19 events

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

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Every record we have

Full data for 1137-1139 Potrero 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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