AL3 4

6,160 people · median £820,000 · St Albans

High wellbeingAmong the least deprived

St Albans Council · Liberal Democrat-controlled 44/56 seats · 79% · OCD 2026

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Environment This postcode sector

NO₂

— WHO guide

PM2.5

7.5

— WHO guide

µg/m³ annual mean · DEFRA

Surface water 1-in-1002.2%

Flood zone1.1% of postcodes

RadonAffected Area (up to 3–5%)

Historic landfill2 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 buildings251

Conservation areas16

Green belt47.1%

Green spaces167

Historic England · OS Open Greenspace

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