Bird box placement

Hello all! 

Having spent the last few years staring out at a very blank canvas of a garden, we are this year making some wildlife friendly changes, such as adding a pond, planting lots of native flower species and bird feeders. I’ve put together a bird box with a 28mm opening and have placed it near to our back door. 

The placement is to both stop any cats from being able to get to it, and also so we can see the action from inside the house, but I wonder whether this will be an area of too high traffic? I have two young kids and we use the garden daily throughout the summer

The door is north east facing  

Cheers!