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4470-4472 17Th St

Corona Heights, SF 94114 2645020 3 units · 2 fl · 1971

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 Corona Heights
At or below average
avg 1.2
1
FewerMore

This building has 1 novs (7y), at or below the Corona Heights average of 1.2.

Rent & eviction protection

Is 4470-4472 17Th 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 1971
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 built1971
Total area2,248 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot2645020
Ownership

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

Owner name
Emilio Castelli & Laura Bat
Mailing address
Castelli Emillo & Batistich 9760 Green Valley Road Sebastopol CA 95472
Last sale
061713

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.

4470 A 17th St, San Francisco, CA 94114
4472 17th St, San Francisco, CA 94114
4470 17th St, San Francisco, CA 94114
Augrented Insights
Initial analysis

The multi-family residential building at 4470-4472 17th Street in Corona Heights is a two-story structure built in 1971 containing three units. The property has undergone significant recent improvements, particularly regarding fire safety, including the installation of a new fire sprinkler system for the ground floor ADU in 2022 (with ongoing work as of 2025), and a comprehensive upgrade to the fire alarm system in 2023-2024 to comply with current fire code requirements. In 2020, the owners successfully legalized an existing ground floor ADU, though this process followed an active complaint investigation in 2019 regarding an unpermitted dwelling unit.

The building has seen substantial interior improvements over the years, including kitchen and bathroom remodels in 2012, window replacements, and HVAC upgrades (including the installation of new furnaces in 2013 and a mini-split system in 2023). Recent concerns have emerged regarding the property's exterior conditions, with multiple 311 calls in early 2025 related to garbage, debris, and graffiti on the property. Additionally, there was a previous issue with short-term rentals in 2019-2020, with neighborhood concerns about unauthorized rentals in a possibly illegal unit, though this appears to have been addressed with instructions to cease short-term rentals and switch to 30-day minimum stays. The building's maintenance record shows regular upkeep of essential systems and infrastructure, though the presence of an active building complaint from 2019 regarding an unpermitted unit suggests some historical compliance challenges that have required resolution through subsequent legalization efforts.

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

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Risk rating

How 4470-4472 17Th 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
42th percentile

Out of 348 buildings in this neighborhood, 202 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
78%
No DBI
violation
22%
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.

DBI tenant complaints (past 7 years)

Formal complaints tenants filed with DBI about this building over 7 years.

Director's hearings (past 7 years)

Director's hearings are escalated enforcement actions for buildings that haven't resolved violations — a serious signal.

Director's hearing rate, owner's portfolio

Per-building rate of director's hearings across the owner's portfolio.

12-Month severity forecast
No violation 66.7%
Moderate concern 29.5%
Severe concern 3.7%
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

4470-4472 17Th St event timeline

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

2025
Plumbing Permit Jan 07
Renewal of pw 20221013731: install new fire sprinkler system at 1st fl & underground services
Complete

See all 13 events

Full history back to 2019 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 4470-4472 17Th 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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