What age will your mortgage take you up to?

My partner and I have a mortgage with a comfortable monthly repayment, 13 years left to run which will take us to ages 55/59.

We recently looked into buying a new build which we pulled out of because, amongst other things, once our heads overruled our hearts, taking out a large mortgage to take us to ages 70/74 seemed irresponsible.

Our house isn't worth a lot so I'm under no illusions there, but now we're 41/45 I wonder if the chance to own a really nice house has already passed us by unless we want to be paying well into retirement.