These terms sound similar but they are used for entirely different purposes.
The housing loan is a loan that is basically used for purchasing a home, though it is often used in a broader sence, for the following:
• acquisition of land and construction of house,
• repairs, renovation, remodeling or extension of a house,
• furnishing, beautification or purchase of a house, etc.
Household loan, on the other hand, is designed to meet the short term financial need of individuals or households with consistent income. As its name indicates, it can be used for purchasing various household items, including electrical devices, such as
• kitchen equipment (waching machine, fridge, dishwasher, freezer, etc)
• IT devices (PCs, laptops, tablets, etc)
• Garden devices (lawmower, etc.)