Home Office Expenses Although she spends most of her day working from the office of TUQ, Robyn occasionally works from home because it saves her time commuting to her office. Robyn has a small room in her house at Bardon which she uses as an office to complete work for TUQ. This room occupies one-tenth of the floor area of the house. The home loan on the house was $720 per week. Electricity and water costs for Robyns office amounted to $450 and $300 respectively. These were supplied through separate meters.