Legal Question in Real Estate Law in Pennsylvania

If they are tenants in common, then each may sell his or her 1/3 to another, and the buyer would then own 2/3. It shouldn't require the approval of any other co--owner.

You'd all be better off settling this among you, or agreeing to sell the property and divide the proceeds equally. A court action will eat up a lot of whatever equity the property has, leaving less for the siblings to share.

THIS RESPONSE IS NOT LEGAL ADVICE, SINCE I DO NOT HAVE ALL OF THE INFORMATION THAT WOULD BE REQUIRED, AND I DO NOT HAVE A REPRESENTATION AGREEMENT WITH YOU.

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