Capital Gains Exclusion on a primary residence

[salmp01]

A friend of mine is considering selling some land where his primary residence (of 20 years) resides.  He asked me this question and I didn't know the answer so I'm seeing if anyone here knows the answer to this...

My friend owns 5 acres of land where his primary residence sits.  He would like to sell 4 acres of his 5 acres parcel and would not include his home in the sale.  Would he and his wife qualify for the 500k capital gains exclusion if they sold the 4 acres and didn't sell their primary residence? 

[terran]

Looks like not unless they also sell the house soon: http://money.stackexchange.com/questions/30045/tax-implications-of-selling-part-of-land-associated-with-main-home

[salmp01]

That's what I'm looking for - thanks !