Sanctimonious German writer's filthy accommodation (6)

I believe the answer is:

pigpen

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'filthy accommodation' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see a link between them that I can't see?

'sanctimonious german writer's' is the wordplay.
'sanctimonious' becomes 'pi' (British abbreviation for pious).
'german' becomes 'g' (abbreviation).
'writer' becomes 'pen' (something which writes).
'pi'+'g'+'pen'='PIGPEN'

Can you help me to learn more?

(Other definitions for pigpen that I've seen before include "tip" , "that accommodates swine" , "Sty for swine" , "Sty (American)" .)

I've seen this clue in The Independent.

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