The HP21 7 postcode sector is within the county of Buckinghamshire in the South East of England.
HP21 7 is a postcode sector within the HP21 postcode district which is within the HP Hemel Hempstead postcode area.
The Royal Mail delivery office for the HP21 7 postal sector is the Aylesbury Delivery Office.
The area of the HP21 7 postcode sector is 0.85 square miles which is 2.19 square kilometres or 541.03 square acres.
Waterways within the HP21 7 postcode sector include the Grand Union Canal - Aylesbury Arm.
The HP21 7 postcode sector is crossed by a railway.
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