Learn Dutch: Wij verlaten het huis, tenzij u de zolder nog wilt inspecteren. - We are leaving the house, unless you still want to inspect the attic.

Not with this exact sentence structure. Afgezien van is a complex preposition, which means it must be followed by a noun phrase (e.g., afgezien van de zolder - apart from the attic). Tenzij (unless) is a conjunction, which is why it can introduce a full clause with its own subject (u) and verbs (wilt inspecteren).

Why do the verbs wilt inspecteren get pushed to the end of the sentence?

Tenzij is a subordinating conjunction. It introduces a subclause, which forces all verbs to the end of that clause. Remember that this is different from coordinating conjunctions like en, maar, or want, which keep the standard word order.

Could I change the verb order at the end and say inspecteren wilt?

Yes, you can! When a subordinate clause ends with a conjugated modal verb (wilt) and an infinitive (inspecteren), they can appear in either order. Both wilt inspecteren and inspecteren wilt are grammatically correct, though putting the conjugated verb first is slightly more common in everyday speech.

Why is the adverb nog placed after de zolder instead of before it?