CM20 2

19 sales in the last 12 months · median £422,500 · East Hertfordshire

East Hertfordshire Council · Green / Liberal Democrat coalition 26/50 seats · 52% · OCD 2026

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Environment This postcode sector

NO₂

9.4

— WHO guide

PM2.5

7.1

— WHO guide

µg/m³ annual mean · DEFRA

Surface water 1-in-1006.2%

Flood zone9.4% of postcodes

Radonup to <1% of homes

Historic landfill8 sites within ~1 km

EA · UKHSA/BGS · Mining Remediation Authority — indicative, not a property search

Road & rail noise bands (≥55 / ≥65 dB Lden) are being added — not yet available for this area. They cover major sources only; "not mapped" ≠ "quiet".

Defra strategic noise mapping

Listed buildings40

Conservation areas1

Green belt27.3%

Green spaces165

Historic England · OS Open Greenspace

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