Free SF apartment background check

621 Natoma St

South of Market, SF 94103 3727039 2 units · 1 fl · 1906

Nothing on record for this building in the last seven years, and our model puts it at a low risk of maintenance problems over the next 12 months. No public enforcement record to go on. Walk the building, ask the current tenants how repairs get handled, and get any promises in writing.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in South of Market — not a forecast
At or below average
avg 3.3
0
FewerMore

This building has 0 novs (7y), at or below the South of Market average of 3.3.

Rent & eviction protection

Is 621 Natoma 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
RED
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.

Statewide backstop · AB 1482

California Tenant Protection Act of 2019

Even when a building isn't covered by local rent stabilization, the statewide Tenant Protection Act (AB 1482) may still apply. It caps annual rent increases and requires the landlord to state a legal reason to end most tenancies.

15+ years since occupancy
Built 1906
Annual rent increase cap
5% + CPI, max 10%
Just-cause eviction
After 12 months
Local rent control likely takes priority. This building appears to fall under the local ordinance above, which is stronger than AB 1482. Where a local just-cause ordinance applies, its rules govern instead of the state cap.

AB 1482 does not apply to single-family homes and condos unless owned by a corporation, REIT, or an LLC with a corporate member; to owner-occupied duplexes; or to deed-restricted affordable housing. The Act is in effect until January 1, 2030. Not legal advice — see the California landlord–tenant guide.

Building characteristics
Units2
Floors1
Year built1906
Total area1,325 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3727039
Ownership

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

Owner name
Mailing address
601 Buena Vista Ave W San Francisco CA 94117
Last sale
October 19, 1994

Landlord portfolio

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

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Augrented Insights
Initial analysis

The two-unit residential building at 621 Natoma Street, owned by Matthew P. Leffers, has a storied history dating back to its 1906 construction. The property has experienced recurrent maintenance issues over the past two decades, with the most recent significant concern being documented flooding problems in early 2015, where one unit reportedly experienced five inches of water accumulation due to pipe issues during rainstorms. The building has undergone several major repairs, including termite remediation (1994) and reroofing work (1991), though some permits from this period are now expired. A notable cluster of building violations emerged in October 2003, including problems with smoke detectors, toilet security, electrical wiring, light fixtures, and damage to interior surfaces, though these were all abated by December 2003. Additional violations were recorded in 2008 regarding fire safety and structural concerns, and there were complaints in 2004 about electrical issues and heating problems.

The building's condition has raised multiple concerns over the years, as evidenced by various tenant complaints between 1996 and 2005. These issues included heating failures, plumbing problems, mold growth, and questions about building code compliance. The property has also experienced recurring environmental challenges, with multiple reports of graffiti, debris, and sanitation issues noted in recent 311 calls throughout 2023-2024. While many historical violations have been resolved, the pattern of water-related issues in 2015 and the presence of maintenance violations in various categories suggest ongoing upkeep requirements. The building's maintenance history includes both addressed violations and some expired permits, indicating a complex relationship between repairs undertaken and regulatory compliance during the property's lifespan. Recent 311 calls primarily relate to exterior conditions, such as street cleaning and lighting issues, though these are more related to the surrounding area than the building's internal conditions.

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

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Risk rating

How 621 Natoma 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

Lower risk — safer than most nearby

DBI rarely finds violations here. Strong maintenance history and a clean complaint record.

Typical — about average for the neighborhood

Some past violations or complaints on record. Worth asking the landlord about any open issues before signing.

Higher risk — riskier than most nearby

Elevated violation and complaint history. DBI has found issues here before and is statistically likely to again.

Neighborhood percentile
74thpercentile

Out of 430 buildings in this neighborhood, 112 are predicted to be safer. The band is relative to this neighborhood, so a share of every neighborhood falls in each colour.

RiskiestSafest
Predicted 12-month outcome
81%
No DBI
violation
19%
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 (ZIP code)

The ZIP code captures local housing market and enforcement patterns that affect all buildings in the area.

Estimated permit spend (past 7 years)

Dollar value of permits pulled at this address — large recent spend can signal deferred-maintenance catch-up.

Building permits, owner's portfolio

Permits pulled across all of this owner's buildings over 7 years.

12-Month risk forecast
Low failure risk 19%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

621 Natoma St apartment reviews

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The story over time

621 Natoma St event timeline

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

2026
311 Request Apr 16
Homelessness and supportive housing
housing homeless request for service
311 RequestApr 07
Garbage and debris

See all 7 events

Full history back to 2022 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 621 Natoma St apartments

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

Side by side

How 621 Natoma St compares to the neighborhood

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