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21-25 Castro St

Hayes Valley, SF 94117 1260019 3 units · 3 fl · 1961

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 Hayes Valley
At or below average
avg 2.3
0
FewerMore

This building has 0 novs (7y), at or below the Hayes Valley average of 2.3.

Rent & eviction protection

Is 21-25 Castro 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 1961
2 or more units
3 units
Property type
Multi-Family Residential
Zoning
RH3
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
Floors3
Year built1961
Total area2,391 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1260019
Ownership

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

Owner name
Curtis Mayah Christina
Mailing address
25 Castro St San Francisco CA 94114
Last sale
083021

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.

25 Castro St, San Francisco, CA 94117
21 Castro St, San Francisco, CA 94117
23 Castro St, San Francisco, CA 94117
Augrented Insights
Initial analysis

The three-unit multi-family residential building at 21-25 Castro Street in Hayes Valley, owned by Curtis Mayah Christina and constructed in 1961, has undergone significant renovations and improvements over recent years. The most substantial work occurred between 2016-2018, when the property underwent major upgrades including the creation of a new accessory dwelling unit in the garage, installation of a new roof deck, comprehensive fire safety systems including sprinklers and monitoring, and extensive interior improvements. These improvements included drywall replacement, kitchen renovations, and updating of all three residential units' electrical systems through complete rewiring in 2017. The building's fire safety features were notably enhanced in 2018 with a new sprinkler waterflow & supervisory system, including updated control panels and smoke detection equipment.

More recent activity includes multiple plumbing and electrical system updates, including modifications to gas lines and installation of radiant heating systems. While there have been numerous 311 calls related to the property in the past year (2024-2025), they primarily concern external issues such as garbage collection and graffiti on public spaces rather than building-specific problems. A 2021 fire alarm system complaint was investigated and found to have no merit as of May 2022. The building's recent maintenance record shows active management and regular updates to critical systems, though prospective tenants should note the structure's age and the significant amount of recent infrastructure work that has been completed.

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

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Risk rating

How 21-25 Castro 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
60th percentile

Out of 1027 buildings in this neighborhood, 411 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
72%
No DBI
violation
28%
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.

Construction spend, owner's portfolio

Estimated permit value across all of this owner's buildings.

12-Month severity forecast
No violation 50.8%
Moderate concern 30.4%
Severe concern 18.8%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

21-25 Castro St apartment reviews

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The story over time

21-25 Castro St event timeline

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

2026
311 Request May 17
Not offensive
other
311 RequestMay 04
Not offensive

See all 6 events

Full history back to 2021 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 21-25 Castro 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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