Is New Castle, DE Safe to Buy? Home Safety Score 78/100
Score 78/100 · Risk: moderate · Water Grade B · Updated 2026-05-03
New Castle has moderate risk. Some factors warrant attention during the home buying process.
Data: EPA SDWIS, FEMA NFIP, Census ACS, EPA Radon Zones Last verified: 2026-05-03
Relative to home values in New Castle, the estimated upgrade outlay falls into the more financially comfortable range — not a trivial number, but a manageable planning target.
What is a home safety score?
The home safety score (0-100) combines multiple environmental risk factors into a single number: water quality grade, lead contamination levels, flood zone exposure, radon risk, and air quality. A higher score means lower overall risk. The score helps homebuyers compare neighborhoods at a glance. New Castle scores 78/100 with a "moderate" risk level.
Remediation Cost Breakdown
Estimated costs to address safety issues for a typical home in New Castle:
Cost ranges are estimates based on national averages. Actual costs vary by property. Get 3 quotes before proceeding.
Per-ZIP Home Safety Scores
Safety scores vary across New Castle's 2 ZIP codes.
| ZIP Code | Score | Grade | |
|---|---|---|---|
| 19720 | 73 | B | View report → |
| 19721 | 83 | B | View report → |
Home Safety Overview
New Castle, Delaware has moderate risk for homebuyers. The average home safety score is 78/100 across 2 ZIP codes. Some risk factors warrant attention during the home buying process.
Safety Score Card
A composite view of New Castle's key risk indicators:
| Risk Factor | Value | Assessment |
|---|---|---|
| Water Quality | Grade B (78/100) | Low risk |
| Lead Risk | 0.0010 mg/L | Low risk |
| Flood Risk | 50% in flood zones | Elevated risk |
| Radon | Zone 2 (Moderate) | Moderate risk |
| Air Quality | AQI 46 (Good) | Low risk |
Cost to Fix: Remediation Breakdown
Estimated costs to address safety issues for a typical home in New Castle:
| Component | Estimated Cost |
|---|---|
| Radon | $400 |
| Flood Insurance | $600 |
| Pfas | $300 |
| Total (low estimate) | $600 |
| Total (mid estimate) | $1K |
| Total (high estimate) | $2K |
Cost ranges are estimates based on national averages and local data. Actual costs vary by property condition, contractor, and scope of work. Get 3 quotes before proceeding.
New Castle vs. Nearby Delaware Cities
How New Castle's overall risk compares to similar cities in Delaware:
| City | Water Grade | Lead ZIPs Over Limit | Flood Claims | Population |
|---|---|---|---|---|
| New Castle | B | 0 | 144 | 6,848 |
| Clayton | A | 0 | 3 | 7,014 |
| Laurel | A | 0 | 17 | 5,903 |
| Selbyville | B | 0 | 376 | 5,811 |
Homebuyer Safety Checklist for New Castle
Before purchasing a home in New Castle, Delaware, complete these checks:
Water Quality
- Request the latest Consumer Confidence Report (CCR) from the water utility
- Test tap water for lead, bacteria, and nitrates ($20-$50 for DIY kit)
Radon
- Conduct a radon test ($15-$30 for short-term kit, $150-$300 for professional)
- New Castle is in Radon Zone 2 (Moderate risk) — testing is strongly recommended
Flood Risk
- Check the property's FEMA flood zone at msc.fema.gov
- Ask about flood history and past insurance claims
- 50% of New Castle is in flood zones — verify insurance requirements
Lead Paint & Pipes
- For homes built before 1978: request lead paint disclosure
- For homes built before 1986: inspect plumbing for lead solder and pipes
- 72% of New Castle homes built before 1986 — pipe inspection recommended
General
- Check for carbon monoxide detectors on every level
- Inspect for visible mold, water stains, or musty odors
- Verify the home's connection to a regulated public water system
Data Sources
- Water quality: EPA SDWIS
- Lead: EPA Lead and Copper Rule
- Flood: FEMA NFIP
- Radon: EPA Radon Zones
- Air quality: EPA AirNow
- Home values: U.S. Census Bureau ACS B25077
- Remediation costs: National cost model (EPA, Census, FEMA data)
Updated daily.
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