Thieves stole £1,500 worth of building equipment when they broke into farm premises near Billingshurst.
Police say that the break-in happened at a property in Stane Street, Adversane, on June 26.
Four Hitachi ZX35 mini digger buckets were stolen.
Police say that, in a separate incident, a container was broken into on a farm in Station Road, Cowfold, on June 24.
Officers say that it is not yet known if anything was taken from the container.