Free SF apartment background check

826-828 Diamond St

Noe Valley, SF 94114 6505005 2 units · 3 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 826-828 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
2 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
Units2
Floors3
Year built1900
Total area2,606 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot6505005
Ownership

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

Owner name
Caulfield Robert Louis
Mailing address
826 Diamond St San Francisco CA 94114
Last sale
040218

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.

826 Diamond St, San Francisco, CA 94114
828 Diamond St, San Francisco, CA 94114
Augrented Insights
Initial analysis

The three-story, two-unit multi-family residential building at 826-828 Diamond Street in Noe Valley, owned by Robert Louis Caulfield, has undergone several significant improvements since its construction in 1900. The most substantial renovation occurred in 2014-2015, involving a horizontal and vertical addition that included the demolition of existing stairs and bathrooms at the rear, relocation of the second unit, and expansion of various living spaces. This major project, costing $350,000, was followed by additional work in 2015 including foundation repairs, complete re-plumbing of three bathrooms and two kitchens, and comprehensive electrical rewiring of both units including the installation of new panels and circuits. During this period, the building also received new heating systems with the installation of an Aqua Therm furnace and updated duct systems.

Earlier improvements include a facade restoration in 2005 ($40,000), which returned the building to its original appearance, and the legalization of its two existing units in 1988. The building has a documented history of maintenance and improvements, though some older permits such as a 1996 reroofing project and a 2006 electrical upgrade have either expired or were completed long ago. The property has generated minimal complaint activity, with only two parking-related incidents recorded in 2018, neither of which directly impacted the building's residential operations. The most recent building permits and improvements indicate that the property has received significant modernization and maintenance attention over the past decade, particularly focusing on infrastructure upgrades and living space improvements.

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

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Risk rating

How 826-828 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
74th percentile

Out of 1879 buildings in this neighborhood, 489 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
86%
No DBI
violation
14%
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 location

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

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 severity forecast
No violation 80.0%
Moderate concern 12.9%
Severe concern 7.1%
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

826-828 Diamond St 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 826-828 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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