Two appliances and crew from Slough and one from Gerrards Cross attended.
An outbuilding was well alight when they arrived.
The firefighters used one set of breathing apparatus and a hose reel
The outbuilding was 100 per cent damaged by fire. A digger and a van were also affected by fire.
Thames Valley Police was notified.
Thames Valley Police has issued an appeal for witnesses in relation to this incident.