Breakdown of Heeft u het document aangaande dit pand bijgevoegd?
u
you (formal)
hebben
to have
dit
this (neuter)
het document
the document
Questions & Answers about Heeft u het document aangaande dit pand bijgevoegd?
Could I just say over dit pand instead of aangaande dit pand?
Yes, you could. aangaande is a formal preposition meaning concerning or regarding. Using over (about) would be perfectly correct but much more casual. Since this sentence uses the formal u and talks about a property document, the formal tone of aangaande fits perfectly.
Could I swap aangaande with inzake or omtrent in this sentence?
You could definitely use omtrent here, as it also means concerning or regarding. inzake is slightly more restricted and translates more closely to in the matter of or regarding the case of. While you might see inzake dit pand in highly legal or bureaucratic contexts, aangaande or omtrent flow better for simply describing the topic of a document.
I always mix up dit and deze. Why is it dit pand here?
pand (property or building) is a neuter noun, so it takes the article het. When pointing out a specific het-word that is close to you, you use the demonstrative pronoun dit (this). If it were a de-word, you would use deze.
Why use bijgevoegd here instead of toegevoegd?