A pooja room does not need to be large. What matters is that it is clean, calm and used every day.
Direction
Traditionally the north-east corner of the home is preferred, with the person praying facing east or north.
Placing the idols
Keep the idols on a raised peeta rather than on the floor, and avoid crowding too many images together.
The essentials
A lamp, a bell, a kalasham, kumkum and haldi, incense and a small plate for flowers cover most daily rituals.