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589-591 Connecticut St

Potrero Hill, SF 94107 4100021 2 units · 2 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 Potrero Hill
At or below average
avg 1.1
0
FewerMore

This building has 0 novs (7y), at or below the Potrero Hill average of 1.1.

Rent & eviction protection

Is 589-591 Connecticut 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
Floors2
Year built1900
Total area2,067 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot4100021
Ownership

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

Owner name
Thamkul Revocable Trust
Mailing address
Mark Thamkul/penny Thamkul 5901 Christie Ave Pob Pl3 Emeryville CA 94608
Last sale
012202

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.

589 Connecticut St, San Francisco, CA 94107
591 Connecticut St, San Francisco, CA 94107
Augrented Insights
Initial analysis

The 2-unit residential building at 589-591 Connecticut Street in Potrero Hill, owned by Thamkul Revocable Trust, is undergoing significant renovation as of October 2023, with a filed permit for a major remodel valued at over $1 million. This ambitious project includes a horizontal addition at the rear, conversion of an unconditioned basement to habitable space, first-floor entry modifications for the lower unit, and comprehensive system upgrades. The building, constructed in 1900, has seen various improvements over the years, including kitchen remodels in 2015 that involved electrical upgrades, plumbing work, and the installation of new fixtures. Historical records show earlier attention to safety concerns, such as the replacement of rotting stairs and railings in 1994.

The property has experienced some maintenance challenges, particularly regarding the sidewalk, with multiple 311 calls between 2022-2024 reporting defects, including lifted and collapsed sections that remain open as of 2022. A building complaint was filed in 2015 regarding unauthorized construction work, including concerns about basement alterations and debris, though this complaint is no longer active. The most recent permit activity suggests substantial improvements are underway, which may address some of the building's historical maintenance issues. Maryland-based developer Corbin Jones (fGBA Inc.) has been associated with the current remodeling project, which includes specific window replacements - three street-facing windows will be upgraded to Marvin aluminum wood clad, with five others receiving vinyl replacements.

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

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Risk rating

How 589-591 Connecticut 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
75th percentile

Out of 726 buildings in this neighborhood, 182 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
83%
No DBI
violation
17%
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.

Property class: multi-family flat

2–4 unit flats (class F) are a common SF building type with their own maintenance and complaint patterns.

12-Month severity forecast
No violation 85.3%
Moderate concern 12.6%
Severe concern 2.1%
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

589-591 Connecticut St event timeline

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

2025
Planning Record Sep 02
APPEAL NO. 25-033: Remodel the existing two-unit building including rear horizontal addition, conversion of the existing unconditioned basement into a habitable space, small horizontal extension at the south property line to accommodate a new entrance to the lower unit, and upgrade all building systems.
Closed - Appeal Upheld

See all 4 events

Full history back to 2023 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 589-591 Connecticut St apartments

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

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