The HA5 3 postcode sector stands on the Greater London and Hertfordshire border in the Greater London area of England..
HA5 3 is a postcode sector within the HA5 postcode district which is within the HA Harrow postcode area.
The Royal Mail delivery office for the HA5 3 postal sector is the Pinner Delivery Office.
The area of the HA5 3 postcode sector is 1.25 square miles which is 3.23 square kilometres or 797.22 square acres.
Waterways within the HA5 3 postcode sector include the River Pinn and Pinn
The HA5 3 postcode sector is crossed by a railway.
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