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31-43 Houston St

Russian Hill, SF 94133 0050006A 6 units · 2 fl · 1906

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

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 31-43 Houston 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 1906
2 or more units
6 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
Units6
Floors2
Year built1906
Total area4,630 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0050006A
Ownership

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

Owner name
Boon Capp Holdings Llc
Mailing address
1780 9th Ave San Francisco CA 94122
Last sale
011019

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.

39 Houston St, San Francisco, CA 94133
37 Houston St, San Francisco, CA 94133
41 Houston St, San Francisco, CA 94133
35 Houston St, San Francisco, CA 94133
31 Houston St, San Francisco, CA 94133
33 Houston St, San Francisco, CA 94133
43 Houston St, San Francisco, CA 94133
Augrented Insights
Initial analysis

The three-story multi-family residential building located at 31-43 Houston Street in Russian Hill, built in 1906 and owned by Boon Capp Holdings LLC, is currently undergoing significant construction work. Most notably, there are two active complaints from November 2023 regarding unauthorized construction work, including concrete pouring, tree removal, and blocking street access, with evidence of work being performed without proper permits. The building previously underwent a substantial renovation project in 2021, which aimed to convert garage and storage areas into additional dwelling units, increasing the total from 6 to 9 units, with an estimated cost of $600,000.

The property has a history of maintenance and safety compliance issues, most concerning being its current non-compliant status with the mandatory soft-story retrofit program (Tier 3). Multiple building violations were recorded in 2015-2016 regarding heating system failures, door glazing reinforcement, and unauthorized construction work on rear decks and stairs. The building has undergone various improvements over the years, including electrical service upgrades in 2016, kitchen and bathroom remodels in 2015, and repairs to address safety violations. Recent maintenance activities have focused on addressing various building systems, though the current construction work has generated multiple complaints from residents regarding safety and permit compliance. The property has experienced minimal fire-related incidents, mostly involving system malfunctions and false alarms, and has a relatively small number of recent 311 calls, primarily related to illegal parking and street cleaning issues.

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

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Risk rating

How 31-43 Houston 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
21th percentile

Out of 1133 buildings in this neighborhood, 895 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
42%
No DBI
violation
58%
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.

DBI tenant complaints (past 7 years)

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

Number of units

The number of units affects how the model reads complaint and violation totals — more units means more potential sources.

Director's hearings (past 7 years)

Director's hearings are escalated enforcement actions for buildings that haven't resolved violations — a serious signal.

12-Month severity forecast
No violation 44.0%
Moderate concern 44.2%
Severe concern 11.8%
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

31-43 Houston St event timeline

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

2026
311 Request Jun 18
No parking
other ok
311 RequestJun 17
Other illegal parking

See all 13 events

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

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Every record we have

Full data for 31-43 Houston 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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