Northwest Hillsdale, San Mateo

Updated · 1,856 residents

Northwest Hillsdale is an exceptionally walkable residential enclave in San Mateo known for its quiet streets and mid-century aesthetic. Residents benefit from high acoustic comfort and easy access to local amenities, making it a stable, pedestrian-friendly choice for those seeking a peaceful suburban environment.

Key Highlights

Moderate PrivacyHighly Pedestrian FriendlyManicured and SpaciousGreat for Dog OwnersSuburban feelQuiet Suburban MixModerate Traffic NoiseModerate Air QualityPurely ResidentialSolid Health CoverageStrongly LiberalDiverse Age MixLow Flood RiskExtreme Fire Risk
Map showing the location of Northwest Hillsdale, San Mateo, CA
Explore full map

About Northwest Hillsdale

Northwest Hillsdale in San Mateo, California, emerged during the post-World War II suburban boom as part of developer David D. Bohannon’s master-planned Hillsdale community. Developed on former dairy land acquired in the late 1930s, the neighborhood is characterized by mid-century single-family ranch homes, including signature "Bohannon homes" constructed in the early 1950s. A central landmark of the neighborhood is Hillsdale High School, completed in 1955. Designed by architect John Lyon Reid with landscape design by Robert Royston, the school’s pioneering "loft-plan" design featured flexible, movable interior partitions and skylights. This innovative modern architecture earned the American Institute of Architects School Design Award in 1955 and served as a prototype for educational facilities nationwide.

The area maintains a distinct residential character marked by its high walkability and relative acoustic comfort. With a score of 7.5 out of 10 for acoustic comfort, the neighborhood offers a tranquil living experience despite its central location in San Mateo. Streets are primarily residential, featuring open green spaces that contribute to a visual appeal score of 8 out of 10. According to iHuus data, the area provides a balanced environment that integrates suburban quietude with the convenience of a highly accessible urban layout.

Families and professionals often gravitate toward this community for its access to the San Mateo Union High School District, which holds a top-tier rating for academic performance. While the neighborhood offers significant benefits regarding flood safety and walkability, prospective residents should note the localized operational challenges within the elementary school district. The area is well-suited for those who prioritize a quiet, stable environment with strong educational infrastructure and a high degree of pedestrian connectivity.

Neighborhood Scores Across 15 Qualities

Privacy Index
Score: 5.6 out of 10

Residential spacing provides a moderate level of separation between neighbors, which is slightly higher than the average for San Mateo. Some areas feature denser housing with closer proximity between homes, while other sections offer standard suburban buffers.

Ranked #12 in San Mateo →
Walkability
Score: 9.2 out of 10

Wide sidewalks on both sides of residential streets and frequent crossings make navigating the area on foot easy. This level of accessibility is slightly higher than the San Mateo average, according to iHuus data.

Ranked #17 in San Mateo →
Visual Appeal
Score: 7.6 out of 10

Upscale suburban features like well-maintained yards and private pools characterize this area. According to iHuus data, the visual environment is more polished than the San Mateo average.

Ranked #11 in San Mateo →
Dog Friendliness
Score: 7.6 out of 10

Abundant access to large sports fields and public parks provides ample green space for pets. According to iHuus data, the area offers better connectivity to open spaces and wider paths than the San Mateo average.

Ranked #10 in San Mateo →
Urban-Rural Index
Score: 6.6 out of 10

Residential pockets feature a mix of single-family homes and larger commercial structures, offering a landscape that is very similar to the broader San Mateo area. According to iHuus data, the environment provides a transition between dense suburban layouts and more open, wooded spaces.

Ranked #9 in San Mateo →
Neighborhood Vibe
Score: 5.3 out of 10

Residential streets and green spaces offer a serene atmosphere punctuated by a moderate selection of local dining and community landmarks. This area provides a slightly more tranquil environment than the San Mateo average, characterized by peaceful pockets of nature alongside occasional social hubs.

Ranked #26 in San Mateo →
Acoustic Comfort
Score: 5.9 out of 10

Steady noise from nearby busy streets is present, though the area remains noticeably quieter than the San Mateo average. According to iHuus data, the acoustic environment is characterized by a consistent hum from local transit.

Ranked #5 in San Mateo →
Air Quality
Score: 6 out of 10

Air quality in this area fluctuates between acceptable and unhealthy levels, presenting occasional concerns for sensitive groups. This level of air quality is consistent with the city average, according to iHuus data.

Ranked #1 in San Mateo →
Industrial Proximity
Score: 9.6 out of 10

Industrial activity is absent from this area, which consists entirely of residential, school, and recreational land use. This lack of warehouses or manufacturing facilities makes the neighborhood slightly more free of industrial proximity than the San Mateo average.

Ranked #18 in San Mateo →
Health Insurance Coverage
Score: 8.1 out of 10

Most residents in this area are covered by health insurance, though the rate is slightly lower than the San Mateo city average according to iHuus data.

Ranked #26 in San Mateo →
Ideological Lean
Score: 9.6 out of 10

Voting patterns and census indicators show a highly liberal leaning that is very similar to the broader San Mateo area. According to iHuus data, the community reflects the same progressive political landscape found across most of the city.

Ranked #28 in San Mateo →
Population Age Profile
Score: 5.4 out of 10

Residents live alongside a balanced distribution of young adults, families, and seniors. This demographic variety is slightly more diverse than the average seen throughout San Mateo, according to iHuus data.

Ranked #4 in San Mateo →
Flood Safety
Score: 7.7 out of 10

Flood safety in this area is notably higher than the San Mateo average. While some residual risk exists due to its location within a 500-year floodplain, according to iHuus data, the area remains generally secure.

Ranked #1 in San Mateo →
Fire Safety
Score: 0.1 out of 10

High wildfire danger persists in this area due to extreme environmental hazards; this risk level is notably higher than the San Mateo city average according to iHuus data.

Ranked #7 in San Mateo →

Address-Level Insights for Northwest Hillsdale

iHuus Neighborhood Intelligence Insights

Get address-level neighborhood insights for Northwest 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

No credit card required

Compare with Any Neighborhood

Compare with
DimensionNorthwest HillsdaleAragon
🚶
Walkabilityavg 8.95
Score: 9.2 out of 10
Score: 10 out of 10
🔊
Acoustic Comfortavg 3.72
Score: 5.9 out of 10
Score: 3.8 out of 10
🤫
Privacy Indexavg 5.13
Score: 5.6 out of 10
Score: 4.5 out of 10
🎨
Visual Appealavg 7.16
Score: 7.6 out of 10
Score: 7.1 out of 10
🐕
Dog Friendlinessavg 6.92
Score: 7.6 out of 10
Score: 6.2 out of 10
🗺️
Urban-Rural Indexavg 6.73
Score: 6.6 out of 10
Score: 6.5 out of 10
Neighborhood Vibeavg 5.61
Score: 5.3 out of 10
Score: 6.8 out of 10
🏥
Health Insurance Coverageavg 8.75
Score: 8.1 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: 9.6 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: 9.6 out of 10
Score: 9.7 out of 10
👥
Population Age Profileavg 4.99
Score: 5.4 out of 10
Score: 5 out of 10
🔥
Fire Safetyavg 0.28
Score: 0.1 out of 10
Score: not available
🏫
School Quality
Score: not available
Score: not available

School Insights for Northwest Hillsdale

School Insights

See what's really behind every school rating near Northwest 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

No credit card required

Frequently Asked Questions

Is Northwest Hillsdale a walkable neighborhood?
Yes, the neighborhood is highly walkable, earning a top score for its pedestrian-friendly layout and easy access to local amenities.
How is the noise level in the area?
The area is notably quiet, with an acoustic comfort score of 7.5 out of 10. Residents typically experience minimal noise from road traffic and other environmental sources.
What school district serves the neighborhood?
Students in the area are served by the San Mateo Union High School District, which is highly regarded for its academic performance and fiscal stability.