Police are appealing for witnesses following suspected arson in Sybil Road, Wisbech.
The incident happened at about midnight on Monday (June 22) when a shed was believed to have been deliberately set on fire.
The fire destroyed the shed and spread, damaging fencing in neighbouring gardens.
PC Justin Bielawski said: “The fire spread and caused significant damage and we are keen to speak to witnesses.
“Although the fire happened at midnight, the footpath close to the houses affected is well-used and a busy route, at all times of the day.”
Anyone with information should call 101, or Crimestoppers, anonymously, on 0800 555 111.