Some things catch the eye when out walking the country lanes . . .

I wonder who lives here. An eccentric Norfolk recluse, maybe?

 Like the door . . . Art Decor, if I’m not mistaken. Somewhat neglected, though.  Maybe if I take a step back; go for the long view . . .

(Keep scrolling. I’ve a feeling the answer lurks down there at the bottom)

A latter day Norman lord in his latter day Norman tower?

No. It’s a latter day Water Board! It’s an old water tower.