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51-53 Castillo St

Visitacion Valley, SF 94134 6320008H 2 units · 2 fl · 1949

This building has far more open problems than almost any other in the neighborhood. Few open issues; problems get fixed quickly. A reasonable bet for a smooth tenancy.

NOVs (7y) vs. neighborhood
Compared to a typical building in Visitacion Valley
Above average
avg 1.4
20
FewerMore

This building has 20 novs (7y), above the Visitacion Valley average of 1.4.

Rent & eviction protection

Is 51-53 Castillo 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 1949
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
Floors2
Year built1949
Total area2,200 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot6320008H
Ownership

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

Owner name
Markelova Guldzhan
Mailing address
916 Southgate Ave Daly City CA 94015
Last sale
041607

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.

53 Castillo St, San Francisco, CA 94134
51 Castillo St, San Francisco, CA 94134
Augrented Insights
Initial analysis

The two-unit residential building at 51-53 Castillo Street is a 1949 two-story structure currently owned by Markelova Guldzhan, located in Visitacion Valley. The property has experienced several significant maintenance and legality issues over its history, with the most pressing recent concerns centered around water damage and mold problems. Between April and September 2024, the building underwent violations related to interior surfaces including damaged walls, water damage, general dilapidation, and several other maintenance issues, all of which were eventually abated. Earlier this year, complaints surfaced regarding possible unauthorized modifications and illegal units, with an active investigation as of June 2024 concerning an illegal lower unit. The building's maintenance history includes a 2006 permit for ground floor alterations to address violation compliance, legalization of specific rooms, and kitchen removal, as well as electrical work that year involving multiple fixtures and circuits. Previous concerns about structural integrity were documented in 2004 when rotted back stairs required reconstruction, and earlier complaints in 2004 noted issues with the porch area and egress requirements.

The property's historical records show recurring concerns about unauthorized units and illegal modifications, with a notable pattern of water-related issues, including recent complaints of roof leaks and mold as reported in 2023-2024. The building's maintenance and compliance history demonstrates periodic attention to structural and safety issues, though some problems have persisted over extended periods, as evidenced by recent violations that emerged in 2024. The property has also generated multiple parking-related complaints in recent years, though these are largely unrelated to the building's internal conditions.

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

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Risk rating

How 51-53 Castillo 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
7th percentile

Out of 214 buildings in this neighborhood, 199 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
53%
No DBI
violation
47%
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.

NOV rate, owner's portfolio

Per-building NOV rate across everything this owner manages — high rates signal pattern neglect.

Notices of Violation (past 7 years)

DBI issued Notices of Violation at this address over the last 7 years — a direct record of code enforcement activity.

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 63.9%
Moderate concern 16.3%
Severe concern 19.8%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

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The story over time

51-53 Castillo St event timeline

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

2026
Plumbing Permit Jun 10
Install (1) shower, shower pan, and (1) kitchenette with sink. relocate (2) water heaters in garage.
Issued
Electrical PermitJun 10
Install (1) kitchenette with (1) 2-burner electric cooktop.

See all 15 events

Full history back to 2024 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 51-53 Castillo 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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