The most common and most likely answer to this crossword clue is the 11 letter word REFURNISHED
I've seen this crossword clue in The Times
R
E
F
U
R
N
I
S
H
E
D
Buddy explains!

The straight part
We know that "house being this?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case house being this? = refurnished.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does REFURNISHED mean?
REFURNISHED verb- To furnish again; to get new furniture for.
- To supply or provide anew.