I have just come back from visiting the Denis Severs house which I've been meaning to do for years but have never quite made it - and what a joy it was. It was like stepping into a time warp, the early 1800s warts and all.
The house is so atmospheric it's difficult to describe, all I can say is GO!
I was absolutely amazed in reading the negative reviews. The man who greets you at the door is lovely. At £7 it was a bargain. You are politely asked to walk silently round the house to absorb the feel of it (and not disturb other people). The staff are unobtrusive and just quietly keep an eye on things. It's dark and gloomy because it's lit by candles. It's supposed to be a lived in house, not a museum so you won't find labels, guided tours, explanations, neatness, tidiness or any kinf of well ordered, sanitised displays.
And yes, part of the house looks derelict, it's the whole point!!
Loved every minute, and I'm going back whenever I can.