Simplistic black and white woodcuts serve as illustrations - colour pictures would have helped bring the text to life (my only quibble). As will be apparent from its size, this is more of a general guide than an in-depth examination, but it packs a lot of information into a small space.
And talking of houses - I highly recommend Simon Jenkins paperback book England's Thousand Best Houses, a brick-shaped county by county guide to the big houses referred to in Wainwright's book. Jenkins is chairman of the National Trust and gives succint descriptions of each house's history, quirks and claim to fame.
Each house warrants at the most a couple of pages in this paperback, but again it is surprising just how much information can be compressed into such a small space. For historical fiction writers, this is your best guide to where to see period houses. All the houses in the book are open to the public and helpfully graded with stars to denote their importance. Oddly enough, I have often found the houses rated 1 star such as Lancaster's Cottage Museum to be more interesting than those rated with 5 stars, an accolade reserved for edifices such as Windsor Castle.