Crime & Safety Report for 439 20th Ave, San Francisco, CA 94121

Review crime and safety information near 439 20th Ave, San Francisco, CA 94121. HoodScore summarizes nearby reported incidents, registered sex offenders, and neighborhood safety indicators to help buyers and renters perform better location due diligence.

Generated At — 2026-07-25

$1,530,000 | 6 bd | 4 ba | 4,330 sqft

Distance rings: 1 mi and 2 mi from the property.

PropertyIncidentsOffenders

Unlock the full safety report before making a decision about this neighborhood.

Full report contains 500 offenders within 5 miles and 29549 crime incidents in the last 12 months.

500 Registered Sex Offenders within 5 miles Near 439 20th Ave, San Francisco, CA 94121

500 Registered Offenders Nearby
138 Rape
320 Child Involved
82 Assault
56 Other
Photo Name / Age / Tags Arrest / Conviction Address Distance Risk
Offender photo

ARROYO, MARVIN

51 years old

Rapist

Violent

2791 16TH ST SAN FRANCISCO, CA, 94103
3.7 Medium
Offender photo

BATES, ANTONIO JUAN

60 years old

Child Involved

424 JONES ST SAN FRANCISCO, CA, 94102
3.7 Medium
Offender photo

BYE, JOHN FRANKLIN

56 years old

Child Involved

111 TAYLOR ST SAN FRANCISCO, CA, 94102
3.8 Medium
Offender photo

CARROLL, JAMES MCNEALY

73 years old

Child Involved

3143 16 TH ST SAN FRANCISCO, CA, 94103
3.3 Medium
Offender photo

CHUA, SENG JOO

46 years old

Child Involved

1288 MISSION ST SAN FRANCISCO, CA, 94103
3.6 Medium

29549 Crime & Incidents in the Last 12 Months

29549 Crime & Incidents by Severity
4740 Severe
3553 Medium
3615 Low
17641 Other
Crime Location (Approx.) Severity Description

Medical Emergency

07/16/2026 10:19 PM

Folsom St & Mabini St, San Francisco, CA 94103

 Unknown

As discussed during the dispatch call, emergency medical services responding to a possible fainting incident near Folsom and Mabini Street.

Fire

07/16/2026 10:14 PM

Mission St, San Francisco, CA 94103

 MEDIUM

As discussed during the dispatch call, fire units were dispatched to a reported commercial building alarm near Mission Street between Julia Street and Eighth Street in San Francisco.

Traffic

07/16/2026 10:14 PM

Columbus Ave & Vallejo St, San Francisco, CA 94133

 LOW

As discussed during the dispatch call, dispatch received a text-to-911 report of a white Nissan Altima driving without headlights near Columbus Avenue and Vallejo Street, reportedly heading toward the pier past Taylor Street with two occupants who may be intoxicated.

Disturbance

07/16/2026 10:14 PM

Jefferson St, San Francisco, CA 94109

 Unknown

As discussed during the dispatch call, officers were dispatched to a priority audible alarm, possibly related to a disturbance, near Jefferson Street and a cross street identified as Richard Henry in San Francisco.

Medical Emergency

07/16/2026 10:13 PM

Powell St, San Francisco, CA 94133

 Unknown

As discussed during the dispatch call, emergency units were dispatched for a possible trauma incident near Powell Street and Embarcadero North. Engine 2, Truck 2, and an ambulance responded on Control 1.

Nearby Schools

Schools within 2 miles of this property, nearest first.

SchoolDistance
Alamo Elementary0.3 mi
Argonne Elementary0.3 mi
San Francisco County ROP0.4 mi
Sutro Elementary0.5 mi
Presidio Middle0.5 mi
Washington (George) High0.6 mi
Peabody (George) Elementary0.9 mi
McCoppin (Frank) Elementary0.9 mi
Lafayette Elementary1.0 mi
Jefferson Elementary1.2 mi
Roosevelt Middle1.2 mi
Independence High1.4 mi
Yu (Alice Fong) Elementary1.5 mi
Lawton Alternative1.6 mi
Presidio Early Ed.1.6 mi

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Frequently asked questions

Is 439 20th Ave in a low-crime area?

The current report summarizes crime-related incidents within 5 miles during the last 12 months. HoodScore compares these records with relevant benchmarks, but no report can guarantee future safety.

Why are traffic and medical calls shown separately from crime?

Traffic, medical and fire records are public-safety incidents but are not necessarily crimes. HoodScore separates them to avoid overstating the crime count.

How often is this HoodScore report updated?

The report displays its generated date. Update frequency varies by source and is explained in the HoodScore methodology.

How is the HoodScore calculated?

HoodScore combines nearby crime and offender data into a neighborhood safety score. Visit https://www.hoodscore.com/hoodscore-calculator.html to see how the calculation works.