Southwest Hillsdale, San Mateo

Updated · 1,339 residents

Southwest Hillsdale is a quiet, residential enclave in San Mateo characterized by its serene atmosphere and abundance of green space. With a focus on residential privacy and low ambient noise levels, it offers a peaceful retreat while maintaining proximity to essential regional services.

Key Highlights

Moderate PrivacyQuiet Walking PathsUpscale Visual AppealGood for Dog OwnersSemi-rural feelQuiet and SuburbanQuiet and SereneModerate Air QualityPurely ResidentialModerate CoverageStrongly LiberalDiverse Age GroupsReliable Flood SafetyHigh Fire Risk
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About Southwest Hillsdale

Southwest Hillsdale is defined by its tranquil, suburban character, offering a retreat from the dense urban activity found elsewhere in San Mateo. The area is primarily residential, featuring quiet streets and significant green space that contribute to a high level of acoustic comfort. Local landmarks such as the Transfiguration Episcopal Church anchor the community, which functions as a remote and low-key pocket of the city. With minimal industrial presence and a layout that prioritizes residential space, the neighborhood maintains a consistent visual appeal and a relaxed pace of life.

Living in this area involves a trade-off between serenity and immediate access to commercial amenities. While it is less walkable than the surrounding Hillsdale neighborhoods, it provides a stable environment for those who value privacy and quiet surroundings. Residents benefit from access to high-performing school districts in the region, making it a suitable choice for families seeking a stable academic environment. The neighborhood is best suited for individuals or families who prefer a secluded, suburban lifestyle over the high-energy, transit-oriented living found in the more central parts of the city.

Neighborhood Scores Across 15 Qualities

Privacy Index
Score: 6 out of 10

Detached homes with modest yards provide more separation between neighbors than is typical for San Mateo. According to iHuus data, the residential spacing offers a standard level of suburban buffer.

Ranked #4 in San Mateo →
Walkability
Score: 8.2 out of 10

Residential streets feature narrow, winding roads with intermittent sidewalks and low traffic volumes. While walking is generally safe, the ease of pedestrian movement is slightly lower than the San Mateo average.

Ranked #31 in San Mateo →
Visual Appeal
Score: 8 out of 10

Manicured yards, large homes, and frequent private pools create an aesthetic that is more visually polished than the San Mateo average. According to iHuus data, the area features prominent architectural variety and well-maintained residential landscapes.

Ranked #5 in San Mateo →
Dog Friendliness
Score: 7.3 out of 10

Nearby sports fields and central park access offer reliable green space for pets, though some residential streets feature narrow sidewalks. According to iHuus data, the level of dog friendliness in this area is slightly higher than the San Mateo average.

Ranked #14 in San Mateo →
Urban-Rural Index
Score: 6.9 out of 10

Frequent open land and scattered homes amid woodland create a more semi-rural atmosphere than most of San Mateo. According to iHuus data, the area features a significant mature tree canopy and dense hillside development.

Ranked #6 in San Mateo →
Neighborhood Vibe
Score: 4.7 out of 10

Primarily a serene and low-density residential area, this neighborhood offers much less commercial activity and social density than the San Mateo average. Residents will find a peaceful setting characterized by green spaces and limited local services, making it more car-dependent for most errands.

Ranked #30 in San Mateo →
Acoustic Comfort
Score: 7.1 out of 10

Acoustic levels are notably lower than the San Mateo average, characterized by minimal traffic noise and only infrequent sounds from distant trains or vehicles. According to iHuus data, this area provides a much more tranquil environment than most parts of the city.

Ranked #1 in San Mateo →
Air Quality
Score: 6 out of 10

Air quality in this area typically fluctuates between acceptable and unhealthy levels; according to iHuus data, these conditions are consistent with the average for San Mateo.

Ranked #1 in San Mateo →
Industrial Proximity
Score: 10 out of 10

Industrial activity and warehouses are entirely absent from this area. According to iHuus data, the neighborhood offers a higher degree of separation from industrial hazards than the San Mateo average.

Ranked #1 in San Mateo →
Health Insurance Coverage
Score: 7.9 out of 10

Health insurance access among residents is relatively high, though it remains slightly below the San Mateo city average according to iHuus data.

Ranked #30 in San Mateo →
Ideological Lean
Score: 9.7 out of 10

Voting patterns and census indicators reflect a predominantly liberal political leaning that aligns with the San Mateo city average.

Ranked #26 in San Mateo →
Population Age Profile
Score: 5.3 out of 10

Residents live alongside a balanced mix of young adults, families, and seniors. According to iHuus data, this demographic spread is slightly more varied than the typical San Mateo profile.

Ranked #10 in San Mateo →
Flood Safety
Score: 7.7 out of 10

Flood risk in this area is notably lower than the San Mateo average, though some residual risk remains due to its location within a 500-year floodplain. According to iHuus data, the neighborhood is generally situated in a safer zone compared to much of the city.

Ranked #1 in San Mateo →
Fire Safety
Score: 0.7 out of 10

Extreme fire hazards are present in this area, representing a much higher risk level than the San Mateo average. According to iHuus data, residents should prioritize maximum protection measures due to the significant danger of wildfire.

Ranked #6 in San Mateo →

Address-Level Insights for Southwest Hillsdale

iHuus Neighborhood Intelligence Insights

Get address-level neighborhood insights for Southwest Hillsdale

  • Street-level scores — see how individual blocks compare, not just neighborhood averages
  • Micro-zone boundaries — identify quiet pockets, flood boundaries, and walkable clusters before you visit
  • 15 dimensions in full — walkability, noise, air quality, school quality, insurance coverage, population age profile, urban/rural index, and more
  • Boundary risk alerts — know if your address sits near a block boundary where scores drop, the kind of detail no listing will ever mention
  • School insights — individual school ratings and insights, not just district-level data
  • Compare before you commit — side-by-side data across neighborhoods, down to block precision

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Compare with Any Neighborhood

Compare with
DimensionSouthwest HillsdaleAragon
🚶
Walkabilityavg 8.95
Score: 8.2 out of 10
Score: 10 out of 10
🔊
Acoustic Comfortavg 3.72
Score: 7.1 out of 10
Score: 3.8 out of 10
🤫
Privacy Indexavg 5.13
Score: 6 out of 10
Score: 4.5 out of 10
🎨
Visual Appealavg 7.16
Score: 8 out of 10
Score: 7.1 out of 10
🐕
Dog Friendlinessavg 6.92
Score: 7.3 out of 10
Score: 6.2 out of 10
🗺️
Urban-Rural Indexavg 6.73
Score: 6.9 out of 10
Score: 6.5 out of 10
Neighborhood Vibeavg 5.61
Score: 4.7 out of 10
Score: 6.8 out of 10
🏥
Health Insurance Coverageavg 8.75
Score: 7.9 out of 10
Score: 8.7 out of 10
🌿
Air Qualityavg 6
Score: 6 out of 10
Score: 6 out of 10
🏭
Industrial Proximityavg 9.34
Score: 10 out of 10
Score: 9.4 out of 10
🌊
Flood Safetyavg 5.24
Score: 7.7 out of 10
Score: 4 out of 10
🗳️
Ideological Leanavg 9.68
Score: 9.7 out of 10
Score: 9.7 out of 10
👥
Population Age Profileavg 4.99
Score: 5.3 out of 10
Score: 5 out of 10
🔥
Fire Safetyavg 0.28
Score: 0.7 out of 10
Score: not available
🏫
School Quality
Score: not available
Score: not available

School Districts Serving Southwest Hillsdale

San Mateo-Foster City Elementary School District
Grades K–822 schoolsRatings 1–10/10
7/10

School Insights for Southwest Hillsdale

School Insights

See what's really behind every school rating near Southwest Hillsdale

  • Individual school ratings — each school's own score with outcome context, not just a district average
  • Enrollment & class size data — student-to-teacher ratio and how it compares to the state average
  • Full demographics breakdown — ethnicity and gender composition for every school in the enrollment zone
  • Every school in the district — all schools within the enrollment boundary ranked by rating, not just the closest one
  • Grade levels & benchmarks — elementary through high school, with below/above state-average flags

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Frequently Asked Questions

Is Southwest Hillsdale a quiet place to live?
Yes, the neighborhood is notably quiet. It maintains a low average noise level of 52 decibels, primarily attributed to light road traffic, with no significant noise impact from railroads or aviation.
What is the walkability like in Southwest Hillsdale?
The neighborhood has moderate walkability. While it is not as highly pedestrian-oriented as the nearby central Hillsdale areas, its quiet, residential streets are suitable for walking and dog-friendly activities.
Which school districts serve Southwest Hillsdale?
Students in the area are served by highly-rated districts, including the Belmont-Redwood Shores Elementary School District and the San Mateo Union High School District, both of which are recognized for strong academic performance.