I've said it on here before but the people I know with immaculate houses apply to one or more of the following,
They or a majority of the family are out of the house for the majority of the time work, sports, activities etc,
They have spent all day cleaning/tidying for your visit,
They don't cook much, they eat out, ready meals, frozen food, those prep done cook yourself type things,
They don't have children or pets/children have left home,
They have a cleaner,
They have a playroom and or excellent storage,
They redecorate a lot,
They are constantly cleaning/tidy, you finish your drink they are up and off putting in the dishwasher, you stand up they are plumping your cushion, if they have kids they are hovering behind them wiping, tidying toys etc which is quite a stressful way to be.
There's bound to be a few people who will say none of the above apply but I've never come across anyone in RL who doesn't meet at least one criteria usually more.
My house isn't immaculate, it needs decorating badly but it is very clean/tidy and I'm a SAHM to school age children so the first applies to me. When I had toddlers/babies at home it was messy.
I recommend The Organised Mum Method for helping you focus and not think about housework all day.