What does the house look like, when David finally sees it? How does it compare to the grounds and landscape surrounding it?

The countryside is a breathtaking landscape.

The more I looked, the pleasanter that country-side appeared; being all set with hawthorn bushes full of flowers; the fields dotted with sheep; a fine flight of rooks in the sky; and every sign of a kind soil and climate; and yet the barrack in the midst of it went sore against my fancy.

The house itself was a dreary, unfinished mess. 

The nearer I got to that, the drearier it appeared. It seemed like the one wing of a house that had never been finished. What should have been the inner end stood open on the upper floors, and showed against the sky with steps and stairs of uncompleted masonry. Many of the windows were unglazed, and bats flew in and out like doves out of a dove-cote.