A reasonable period of time for a repair depends on the type or urgency of the required repair.
For example a loss of electricity/water supply or severe leak would be expected to be repaired within 24 hours. Repairs to guttering and general household leaks would be expected to be completed within 7 days. General building repairs such repairs to plasterwork or door frames would be expected to be completed within 1 month. If repairs are required to the physical building structure then time must be allowed to coordinate scaffolding etc.