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43-45 Norton St

Mission Terrace, SF 94112 3206027 2 units · 1 fl · 1906

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 Mission Terrace
Above average
avg 2.3
5
FewerMore

This building has 5 novs (7y), above the Mission Terrace average of 2.3.

Rent & eviction protection

Is 43-45 Norton 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
2 units
Property type
Multi-Family Residential
Zoning
RH1
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
Floors1
Year built1906
Total area2,421 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3206027
Ownership

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

Owner name
Bello Ulises
Mailing address
124 Lapham Way San Francisco CA 94112
Last sale
051700

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.

43 Norton St, San Francisco, CA 94112
45 N Norton St, San Francisco, CA 94112
Augrented Insights
Initial analysis

The two-unit, one-story multi-family residential building at 43-45 Norton Street in Mission Terrace, owned by Ulises Bello, has a documented history spanning several decades since its construction in 1906. The property has undergone multiple significant maintenance and improvement projects, with the most recent focusing on roof repairs in late 2024, including both cement siding installation and rear roof replacement. The building experienced notable plumbing and maintenance issues in 2024, including violations for mold/mildew, sanitation problems, and drainage issues, all of which were officially abated by October 2024. Earlier violations from 2013 highlighted concerns with window hardware, floor coverings, and various plumbing issues, particularly relating to a laundry setup and kitchen repairs, which were also resolved by October 2024.

The building's maintenance history shows regular attention to roofing needs, with reroofing projects completed in 2017 and 2024. Significant infrastructure upgrades were performed in 2009 with an electrical service upgrade to 200 amps. Historical complaints from the 1990s through 2013 indicate recurring issues with windows, plumbing, and ventilation systems, suggesting periodic maintenance challenges. The property has been active in addressing both regular maintenance and compliance issues, as evidenced by the prompt completion of multiple building and plumbing permits. Recent complaints have primarily focused on interior conditions and plumbing systems, while historical issues often involved windows and general maintenance concerns. The property has experienced minimal parking-related issues in the immediate vicinity, as evidenced by several 311 calls between 2015 and 2024, though these are not directly related to building conditions.

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

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Risk rating

How 43-45 Norton 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
14th percentile

Out of 149 buildings in this neighborhood, 128 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
46%
No DBI
violation
54%
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.

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.

12-Month severity forecast
No violation 41.3%
Moderate concern 44.1%
Severe concern 14.7%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
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The story over time

43-45 Norton St event timeline

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

2025
311 Request Oct 24
Abandoned vehicle
Parking Enforcement

See all 10 events

Full history back to 2024 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 43-45 Norton St apartments

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

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