420 Hemlock Ave, South San Francisco, CA 94080, USA

Property CA
, , , , , , , , , , ,
1

Property Overview:

420 Hemlock Ave is a single-family home in South San Francisco, CA 94080, built in 1948. It features 3 bedrooms, 1 bathroom, a 1,100 sq. ft. interior, and sits on a 5,000 sq. ft. lot. The home includes a parking garage and offers wide access for extra vehicles, boats, or trailers. The estimated home value ranges from $626,500 to $1,085,171.

Neighborhood Highlights:

  • Crime Rate:

    • Personal crime risk: 5.3% (lower than state average of 11.8%)
    • Property crime risk: 7.3% (lower than state average of 10.8%)
    • 17 criminal and sex offenders within 1 mile

  • Schools:

    • Nearby schools: Martin Elementary, Parkway Heights Middle, South San Francisco High, and Community Day
    • Above average school ratings
    • Average SAT score: 951 (state average: 975)

  • Job Market:

    • 58.3% white-collar jobs, 41.7% blue-collar jobs
    • Unemployment rate: 3.6% (lower than state average of 4.7%)

  • Demographics:

    • Community population: 59,728 (10% growth since 2000)
    • 73% families with children
    • Largest age group: 25-34 years (15%)

  • Natural Disaster Risk:

    • Very high earthquake risk
    • Very low tornado risk
    • Minimal flood risk

  • Weather:

    • Average temperature: 48.8°F (January), 62.9°F (July)
    • Average rainfall: 18.3 inches/year
    • Average snowfall: 0 inches/year

  • Cost of Living:

    • Median household income: $66,857
    • Average annual spending: $52,389

Property Features:

  • Solid home with great potential; needs cosmetic updates
  • Large lot with alley access for extra vehicles, RV, boat, or trailer
  • Sunny backyard ideal for gardening and outdoor living
  • Remodeling opportunity: Paint, update, and expand to add value
  • Expansion possibilities: Potential for ADU(s) or granny flat
  • Recent upgrades (in some listings):
    • Completely upgraded electrical (200-amp panel, full rewire)
    • Fresh paint inside and out
    • High-end stainless steel kitchen appliances
  • Large patio/deck for entertaining
  • Bay and mountain views from various rooms
  • Attached one-car garage and additional driveway for RV/boat parking

Location Benefits:

  • Prime Paradise Valley neighborhood:
    • Family-friendly and quiet
    • Across 101 from Oyster Point biotech hub
    • Near Sign Hill Park, schools, playgrounds, and community amenities
    • Easy access to major highways for commutes to San Francisco, Silicon Valley, and SFO
    • Minutes from Grand Avenue, Costco Business Center, and biotech employers
  • Investment potential:
    • Versatile lot for future expansion or ADU development
    • Strong rental and resale market in a sought-after area

Summary:
420 Hemlock Ave offers a rare opportunity to own a home with tremendous potential in a desirable, safe, and convenient neighborhood. With its large lot, expansion options, and proximity to top amenities and employers, this property is ideal for families, investors, or anyone seeking to create their dream home in South San Francisco.

2

Price and Status History

date type price
2019-10-07 For Sale NaN
2020-02-09 For Sale 800000
2020-02-20 Pending NaN
2020-03-18 For Sale NaN
2020-03-25 Pending NaN
2020-04-17 Sold 812000
2020-07-28 Rental 4000
2022-04-30 Off Market NaN
2024-05-24 For Sale 1149000
2024-05-25 Sold 1149000
2024-06-05 Pending NaN
2024-06-12 For Sale 831000
2024-06-20 Sold 1247500
2025-04-11 For Sale 1098000
2025-04-18 Pending 1098000
2025-06-27 Sold 1247500
3

Superfund Enterprise Management System

SITE NAME ADDRESS FEDERAL FACILITY NPL STATUS NON-NPL STATUS CONTAMINANTS SEMS EPA ID DISTANCE (MILES)
HOMART DEV CO (BETHLEHEM STEEL) 430 Poletti Way, South San Francisco, CA 94080, USA N N NF 0 CAT080029812 0.63
EDWARDS CO & Poletti Way, South San Francisco, CA 94080, USA N N NF 0 CAD982358798 0.63
DECCA XAGON 338 North Canal Street, South San Francisco, CA 94080-4672, USA N N NF 0 CAD980390272 0.84
SUN CHEMICAL 20-40 South Linden Avenue, South San Francisco, CA 94080-6423, USA N N NF 0 CAD980817506 0.86
BASAPCO INC 27 South Linden Avenue, South San Francisco, CA 94080-6407, USA N N NF 0 CAD068843796 0.92

Toxic Release Inventory

FACILITY NAME ADDRESS TOTAL FORMS LAST FORM YEAR RISK SCREENING FACILITY ID DISTANCE (MILES)
SIMPSON COATINGS GROUP INC 111 South Maple Avenue, South San Francisco, CA 94080-6303, USA 100 2007 N/A 94083DJSMP111SO 0.97

Integrated Compliance Information System - Air

PLANT NAME ADDRESS OPERATING STATUS DISTANCE (MILES)
AIRPORT INN 751 Airport Boulevard, South San Francisco, CA 94080-1815, USA OPR: Operating 0.40
RAMADA 721 Airport Boulevard, South San Francisco, CA 94080-1815, USA OPR: Operating 0.42
SOUTH CITY FORD 315 Airport Boulevard, South San Francisco, CA 94080-1810, USA OPR: Operating 0.59
RAMADA LIMITED AND SUITES 721 AIRPORT ROAD, South San Francisco, CA 94080-1815, USA OPR: Operating 0.70
GRAND HOTEL 731 AIRPORT ROAD, South San Francisco, CA 94080-1815, USA OPR: Operating 0.70
HAMPTON INN 300 Gateway Boulevard, South San Francisco, CA 94080-7016, USA OPR: Operating 0.78
EMBASSY SUITE 250 Gateway Boulevard, South San Francisco, CA 94080-7018, USA OPR: Operating 0.80
HILTON GARDEN INN 670 Gateway Boulevard, South San Francisco, CA 94080-7014, USA OPR: Operating 0.87
LARKSPUR LANDING 690 Gateway Boulevard, South San Francisco, CA 94080-7014, USA OPR: Operating 0.90
4

Flood Risk Info

fld_zone very high impact: up to 0.0001 miles high impact: up to 0.2 miles moderate impact: up to 0.5 miles low-moderate impact: up to 1.5 miles
A 0 0 0 3
AE 0 0 0 7
AH 0 0 1 0
AO 0 0 0 0
VE 0 0 0 0

Flood Zone Type

code meaning
A 1% annual chance flood zone determined using approximate methods. No BFEs shown. Flood insurance and management standards apply.
AE 1% annual chance flood zone determined by detailed methods. BFEs shown. Insurance and floodplain management required.
AH Shallow flooding (ponding) zones with depths between 1-3 feet. BFEs shown. Insurance and management required.
AO Shallow flooding (sheet flow) zones with depths 1-3 feet. BFEs or average depths shown. High-velocity areas may exist.
VE Coastal 1% annual chance flood zone with wave action. BFEs shown. Insurance and management required.

Earthquake Risk Info

zone_name quad_name very high impact: up to 0.0001 miles high impact: up to 2.0 miles moderate impact: up to 10.0 miles
San Andreas - Peninsula Montara Mountain 0 0 1
San Andreas - Peninsula San Francisco South 0 0 1

Landslide Risk Info

lscat very high impact: up to 0.0001 miles high impact: up to 0.04 miles moderate impact: up to 0.1 miles low-moderate impact: up to 0.2 miles
8 0 0 0 0

Liquefaction Risk Info

Suscept very high impact: up to 0.0001 miles high impact: up to 0.05 miles moderate impact: up to 0.5 miles low-moderate impact: up to 1.0 miles
High 0 0 0 1
Very high 0 0 0 2

Wild fire Risk Info

haz_class very high impact: up to 0.0001 miles high impact: up to 0.5 miles moderate impact: up to 1.5 miles low-moderate impact: up to 3.0 miles
High 0 1 0 0
Very High 0 0 0 0
5

Traffic Noise by Hour x Weekday

hour_of_day Monday Tuesday Wednesday Thursday Friday Saturday Sunday
0 40 39 41 39 41 40 38
1 39 39 39 40 38 39 39
2 39 39 38 39 40 40 39
3 39 39 37 37 40 38 40
4 39 39 39 40 38 37 41
5 37 40 37 38 37 38 39
6 35 38 37 38 37 36 37
7 37 37 37 37 39 36 37
8 36 36 37 38 36 37 38
9 37 36 37 35 37 38 39
10 38 37 38 37 35 38 38
11 38 37 37 36 34 36 33
12 35 38 38 36 37 37 36
13 37 37 36 39 37 37 38
14 41 41 39 42 39 39 43
15 48 47 39 44 47 39 39
16 41 39 39 41 42 39 40
17 42 43 40 41 42 40 39
18 40 43 42 41 41 41 38
19 41 40 39 34 40 40 38
20 40 41 38 40 39 38 40
21 41 39 41 41 42 39 40
22 40 42 39 37 42 41 38
23 40 41 38 40 39 39 39
6

Airplane Noise by Hour x Weekday

hour_of_day Monday Tuesday Wednesday Thursday Friday Saturday Sunday
0 6 7 5 5 6 7 6
1 3 3 2 3 3 3 3
2 1 2 2 2 3 3 2
3 1 2 2 1 2 1 1
4 1 1 1 2 1 2 2
5 3 4 3 3 2 3 4
6 5 6 6 5 7 6 5
7 7 7 6 6 6 7 8
8 6 7 7 7 7 8 6
9 9 9 8 9 10 9 8
10 7 6 6 8 8 6 7
11 10 11 10 10 11 11 11
12 10 7 8 9 8 8 8
13 12 12 14 12 9 10 12
14 9 10 9 9 10 9 8
15 7 5 8 7 7 7 8
16 9 8 9 10 9 7 8
17 9 8 9 8 8 6 8
18 5 7 5 7 6 5 7
19 8 8 10 10 9 6 7
20 4 6 5 5 5 5 5
21 7 5 6 6 6 4 7
22 5 4 4 5 3 5 5
23 8 7 8 9 9 9 10