Londoner Charles Christie-Webb runs a small estate agency out of a double-decker bus in Camden Town.
A few months ago, for £750 ($1,130; €960) he purchased a DJI Phantom drone, which carried a Go-Pro camera he could pair with his iPhone.
With some assistance from his son, Mr Christie-Webb began filming from the air the 200-odd streets where he sells properties, describing their history and styles of architecture to prospective buyers.
He is one of a growing number. Between January and October 2014, the number of organisations permitted by the UK's Civil Aviation Authority (CAA) to fly drones under 20kg rose by 80%.Drones are taking off.