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635-637 Connecticut St

Potrero Hill, SF 94107 4100053 2 units · 3 fl · 1964

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 635-637 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 1964
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 built1964
Total area2,723 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot4100053
Ownership

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

Owner name
Arthur C & Cheryl Ann Agnos
Mailing address
Agnos Arthur C & Cheryl Ann 641 Connecticut St San Francisco CA 94107
Last sale
022019

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.

635 Connecticut St, San Francisco, CA 94107
637 Connecticut St, San Francisco, CA 94107
Augrented Insights
Initial analysis

The property at 635-637 Connecticut Street is a three-story, two-unit multi-family residential building located in Potrero Hill, owned by Arthur C & Cheryl Ann Agnos and constructed in 1964. The building has undergone several significant improvements over the past two decades, with the most recent major work being a roofing project completed in 2020 that involved installing new four-ply tar and gravel roofing to comply with California's cool roof requirements, at a cost of approximately $21,500. The building underwent substantial renovations in 2013, including kitchen remodels, bathroom renovations, and the installation of a solar panel system (3.185 kW with 13 roof-mounted modules) along with a 100-amp electrical service upgrade. This renovation work also included replacing three FAU units with 80% AFUE systems and updating ductwork that previously contained asbestos. Earlier modifications were attempted in 2005 to enclose a basement deck and add a bathroom, though these permits were ultimately cancelled.

The building has experienced minimal issues that required attention, with the most notable being a complaint in December 2020 regarding unpermitted construction signs and a porta-potty placement during renovation work, which was subsequently addressed through proper permitting. Recent activity at the property includes a 2024 Rent Board request that resulted in a status change from 2 exempt units to 2 rentals, and a tree maintenance issue reported in August 2024. The surrounding area has experienced several infrastructure-related issues, particularly regarding pavement conditions, with multiple reports of pavement defects on Connecticut Street between 2010 and 2017. The property has generally maintained compliance with building codes and regulations, with all significant renovation work having obtained proper permits and undergone necessary inspections.

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

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Risk rating

How 635-637 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
39th percentile

Out of 726 buildings in this neighborhood, 443 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
70%
No DBI
violation
30%
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.

DBI tenant complaints (past 7 years)

Formal complaints tenants filed with DBI about this building over 7 years.

Neighborhood location

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

12-Month severity forecast
No violation 77.2%
Moderate concern 19.4%
Severe concern 3.4%
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

635-637 Connecticut St event timeline

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

2024
311 Request Oct 04
Rent board
rent board request for service
311 RequestAug 20
Damaged tree

See all 4 events

Full history back to 2020 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 635-637 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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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

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