Howellville, Tredyffrin Township, Pennsylvania has a mixed investment profile, with prices 18% below Tredyffrin Township, a 3.5 gross yield, and education in the 98th percentile. Prices are 59% above Pennsylvania and fell 8.1% over the past year, while the Red Flag score is 60 and walkability is 74. The main strength is the very high education percentile; the main risk is the combination of a lower yield and a Red Flag score of 60.
AI Summary•Updated May 2026
Area
17.75 mi²
ZIP Code
19355
County
Chester County
State
Pennsylvania
Redfin — median sale & volumeZillow ZORI — asking rentFEMA National Risk Index v1.20OpenStreetMap — POIFBI UCR — state crimeEPA — radon zonesWashU ACAG — satellite PM2.5EPA FRS / BTS — hazard screeningUS Census ACS / TIGER 2024
Verified Price · Median Sale
$781,768
YoY-8.1%
Gross Rental Yield
3.5%
Listed rent · ZORI annualized
Red Flag Index
High
60 / 100
Walkability Score
74
Very Walkable
OpenStreetMap POI density · national percentile
Education Score
98 / 100
Excellent · better than 98% of U.S. districts
Pre-pandemic SEDA (2018/19) · district proxy
AI Score
39
Limited
DistrictScore attractiveness · national model
Howellville Property Prices & Rental Yield
Verified Redfin sale data and Zillow ZORI asking rent for Howellville, Tredyffrin Township.
Market Trend (12-Month)
12 Months
$852K$819K$786K$753K$720K
Verified Sale Price (Median)
Jun '25May '26
Verified = Redfin median sale price (MLS). Rolling 3-month series.
Unlock the Howellville 12-month price trend
See the full Verified vs Listed price history — free with a DistrictScore account.
FEMA National Risk Index composite across eight hazards, plus inherited Pennsylvania crime context.
Red Flag Breakdown
60 / 100
High Risk
Composite is weighted by expected impact — frequent low-damage hazards (hail, wind) weigh less than flood or wildfire.
Hurricane80Very High
Heat80Very High
Strong Wind80Very High
Flood60High
Earthquake60High
Tornado60High
Wildfire40Moderate
Hail20Low
8/8 hazards scored · FEMA NRI v1.20
Crime (state-level): Pennsylvania averaged 16.8 crimes and 2.5 violent per 1,000 residents (-7.8% YoY) in 2024(FBI UCR). Compare the state to the country, not states as a ranking — full Safety & Crime data lives on the state page.
Insights are generated from Howellville's live DistrictScore metrics.
Howellville Environment & Safety
Satellite PM2.5 air-quality history, FBI UCR crime trend (Pennsylvania-level, the finest official aggregation), EPA radon potential and point-source hazard screening.
Air Quality — PM2.5
2015–2024
6.3 µg/m³ Meets EPA, above WHO guideline-28.9% since 2015
9.57.86.24.5
EPA 9WHO 5
20152024
Annual mean fine-particle (PM2.5) concentration at the Howellville centroid, satellite-derived (ACAG). References: WHO guideline 5 µg/m³ · EPA annual standard 9 µg/m³. Latest year ranks worse than 60% of U.S. neighborhoods.
Pennsylvania Crime Trend
FBI UCR
24120
20132024
All crimes / 1k
Violent / 1k
Year
Crimes / 1k
Violent / 1k
YoY
2024
16.8
2.5
-7.8%
2023
18.3
2.7
+2.7%
2022
17.9
2.9
+16.8%
2021
15.3
2.8
-23.5%
2020
20.3
3.9
+18.8%
2019
17.1
3.1
—
Reported at the state level — the finest official US crime aggregation; Howellville inherits the Pennsylvania figures.
Radon Potential
EPA
Zone 1
Zone 1 — Highest potential · Howellville
EPA radon zones estimate indoor radon potential county-wide (Zone 1 highest, Zone 3 lowest). Testing is recommended in all zones.
Environmental Hazards
EPA / BTS
Superfund (NPL)0.3 kmVery High
Industrial odor8 nearbyVery High
Point-source screening near Howellville: EPA Superfund National Priorities List & Facility Registry (2026), BTS aviation noise (2020, 24-hour average level). Superfund shows distance to the nearest listed site; odor shows detected sources within the screening radius. Only detected sources are listed; the bar shows severity vs. all U.S. neighborhoods.
Walkability & Amenities in Howellville
Amenity density and pedestrian access from OpenStreetMap points of interest.
Walkability & Amenities
OpenStreetMap POI
74
Very Walkable
Walkability Score
11
Grocery
72
Dining
14
Schools
0
Universities
6
Hospitals
1
Pharmacies
19
Parks
6
Rail Transit
0
Coworking
POI counts are amenities within Howellville's boundary plus a 400 m walk buffer. Rail transit excludes bus stops.
Howellville vs Tredyffrin Township vs Pennsylvania
How Howellville benchmarks against its city and state medians.
Benchmark vs City & State
Across Howellville, the median sale price sits about 18% below the median for Tredyffrin Township neighborhoods and about 66% above the statewide median. Gross rental yield is 3.5%, against 3.4% for Tredyffrin Township neighborhoods and 6.4% statewide. Over the past 12 months, prices fell 8.1%. Transaction liquidity sits below the median for Tredyffrin Township neighborhoods and above the statewide median.
Howellville, Tredyffrin Township, Pennsylvania has a mixed profile. Prices are 18% below Tredyffrin Township but 59% above Pennsylvania, gross yield is 3.5, and values fell 8.1% over the past year. The Red Flag score is 60, while education is in the 98th percentile.
Neighborhoods near Howellville
Compare Howellville with nearby neighborhoods in Tredyffrin Township.