A crew from the town was called to East Way at around 9.35pm yesterday after reports of a garden shed on fire.
A North Yorkshire Fire Services spokesman today said: "A crew from Whitby was called to a garden shed on fire which resulted in slight fire damage to the shed.
"The fire was extinguished by a resident using a garden hose prior to our arrival."
He said the crew had used a thermal imaging camera and lights while at the scene.
It is believed that the cause was a dropped cigarette, he added.