You can already claim a tax deduction for genuine home office expenses, so I think this will be a given. You should be able to claim a portion of your power, internet, water, mobile phone, etc as I understand it.
For most people it works out better to claim the government's set rate for home office expenses, which allows for all of the above.
Even when claiming "professional office cleaning" my actual home office expenses come short of the set rate.
Might be different if your an employee and the company doesn't supply all consumables (computers, monitors, paper, printer, printer ink, etc), like mine does.