This largely comes down to subtlety and foresight. It doesn’t have to involve installing expensive walk-in baths before you really need them. For example, including a sizeable downstairs bathroom in your house design will allow it to be converted to a wet room at a later date if needed. This is a great first step in future proofing your home, and is also nice and subtle. And, as a bonus, you get to enjoy a nice big downstairs bathroom.
Of course, an accessible bathroom doesn’t mean you have to have a wet room, either. A walk-in shower is a safe and stylish option that has much less fall risk than a shower over the bath. Most people aren’t regular bathers anyway, and you probably wouldn’t miss a bath too much… and let’s not forget how much more water you save with a shower!
Leaving the wall next to the bath untiled, the better for installing a handrail without ruining the décor, is another easy way of planning ahead. A very simple one is just making sure there is enough manoeuvrable space between all the bathroom features. Little considerations at the design stage will make the addition of future proofing, should the need arise, that much easier.