The very word tends to inspire dread by simple association with so many unfortunate and minimalist renovations that happened in the 1970's onward.
But by way of one of our readers, a view of a nice renovation by Duncan Stroik can be seen at the Hermeneutic of Continuity:
AFTER
From the Hermeneutic of Continuity, he links to The Crescat who in turn shows another wondrous renovation project:
AFTER