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I am sorry to hear about this situation. No, the BOD cannot block such sales unless (1) the HOA is active and (2) there specifically exists a bylaw that allows the BOD to block the sale in such a situation. But even if the HOA is active, then unless there is a bylaw that specifically disallows the sales, it can happen.
But the HOA may pass a bylaw that states that no home may be sold without completed landscapes and driveways, etc. If so, then it would be binding unto the builder since he is an "owner" under HOA. The matter is only pushing it through the HOA to include in official bylaws.
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