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607-611 Diamond St

Noe Valley, SF 94114 2804030 3 units · 2 fl · 1900

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 Noe Valley
At or below average
avg 1.2
0
FewerMore

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

Rent & eviction protection

Is 607-611 Diamond 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 1900
2 or more units
3 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
Units3
Floors2
Year built1900
Total area4,140 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot2804030
Ownership

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

Owner name
Nancy Mazza 1996 Revoc Intv
Mailing address
Susan Hogeland 1068 Orchard St Healdsburg CA 95448
Last sale
050520

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.

611 Diamond St, San Francisco, CA 94114
607 Diamond St, San Francisco, CA 94114
609 Diamond St, San Francisco, CA 94114
Augrented Insights
Initial analysis

The property at 607-611 Diamond Street is a two-story, multi-family residential building located in Noe Valley, consisting of three units and built in 1900. The building's maintenance history shows regular upkeep, with significant work including a bathroom remodel in 2019 (valued at $13,705), window replacements in 2015 (four front windows for $5,800), and roof work in 2008 ($19,800). More recent improvements from 2019 included a complete bathroom remodeling with electrical upgrades (lighting, switches, and fan) and a 200-amp service upgrade for three meters. The building underwent sewer repairs in 2015 and received plumbing updates including a new shower pan installation.

The property faced several violations in 2011 related to safety and building maintenance, including issues with fire extinguishers, weatherproofing on siding, stairs, and security locks, though all these violations were resolved by October 2011. A minor electrical issue was recorded as a fire incident, though no civilian injuries were reported. Recent years have seen multiple reports of parking violations on the sidewalk in the vicinity, with several citations issued between 2023 and 2025, and a few instances of abandoned vehicle complaints. Regular maintenance work appears to be consistently performed by the current owner, Nancy Mazza, with no active violations or complaints on record since 2011.

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

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Risk rating

How 607-611 Diamond 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
34th percentile

Out of 1879 buildings in this neighborhood, 1240 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
67%
No DBI
violation
33%
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.

Building size

Total floor area — a proxy for building scale and the number of systems (plumbing, electrical, HVAC) that can fail.

Neighborhood location

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

Neighborhood (ZIP code)

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

12-Month severity forecast
No violation 50.6%
Moderate concern 16.8%
Severe concern 32.6%
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

607-611 Diamond St event timeline

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

2026
DBI Complaint Jun 17
On a walk i just noticed a sharp, loose piece of wood on this house. could really hurt someone if it blows off the ledge
Housing Inspection Services

See all 6 events

Full history back to 2023 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 607-611 Diamond 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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