— ACRERIGHT AREA REPORT · POSTCODE SECTOR
Home › Welwyn Hatfield › EN6 4 · postcode sector
5,839 people · median £725,000 · Welwyn Hatfield
High wellbeing
Welwyn Hatfield Council · Labour / Liberal Democrat coalition 31/48 seats · 65% · OCD 2026
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Environment This postcode sector
Air quality
µg/m³ annual mean · DEFRA
Ground checks
Surface water 1-in-1003.2%
Flood zone1.1% of postcodes
Radonup to 1–3% of homes
Historic landfill2 sites within ~1 km
EA · UKHSA/BGS · Mining Remediation Authority — indicative, not a property search
Transport noise (Defra)
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
Heritage & green space
Listed buildings31
Conservation areas1
Green belt83%
Green spaces214
Historic England · OS Open Greenspace
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