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248 Corbett Ave

Corona Heights, SF 94114 2653013 4 units · 2 fl · 1904

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 Corona Heights
At or below average
avg 1.2
0
FewerMore

This building has 0 novs (7y), at or below the Corona Heights average of 1.2.

Rent & eviction protection

Is 248 Corbett 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 1904
2 or more units
4 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
Units4
Floors2
Year built1904
Total area2,065 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot2653013
Ownership

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

Owner name
Malchow Martin Trust
Mailing address
Carl Malchow, Trustee 1387 44Th Ave San Francisco CA 94122
Last sale
031003

Landlord portfolio

Other SF properties this owner holds, with risk grades for each.

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Augrented Insights
Initial analysis

The property at 248 Corbett Avenue is a two-story, four-unit multi-family residential building located in Corona Heights, constructed in 1904 and currently owned by the Malchow Martin Trust. The building has undergone several significant improvements over the years, including a complete reroofing in 2008 costing $11,900, and critical infrastructure upgrades in 2004 such as the replacement of a 6-foot front property line retaining wall ($15,000) and conversion from overhead to underground electrical service. Security enhancements were made in 2003 following a violation for inadequate entry door glazing, which was promptly addressed within four months. Regular routine housing inspections were conducted in 2002, 2010, and 2017, with the most recent inspection showing no active violations.

The building's recent history shows minimal internal issues, with only one minor incident recorded: a carbon monoxide detector activation that was investigated and found to have no CO present. However, there have been numerous reports in the immediate vicinity of the building regarding external conditions, including recurring issues with sidewalk blocking, garbage accumulation, and street cleaning needs between 2020 and 2025. Notably, there are documented problems with sidewalk maintenance, including a lifted section near a utility vault in early 2021 that was inspected and reported. While the building's internal systems and structure appear well-maintained based on historical permit records and routine inspections, the surrounding area has experienced ongoing challenges with public space maintenance and enforcement issues, particularly regarding parking compliance and sidewalk accessibility.

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

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Risk rating

How 248 Corbett 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
33th percentile

Out of 348 buildings in this neighborhood, 233 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
74%
No DBI
violation
26%
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.

Number of units

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

Building age

Older buildings tend to have more maintenance challenges; SF's pre-1906 earthquake housing stock carries distinct risk.

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 59.6%
Moderate concern 19.0%
Severe concern 21.4%
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

248 Corbett Ave event timeline

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

No dated public records on file yet.
Every record we have

Full data for 248 Corbett 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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