The exemption is $250,000 for single and $500,000 for married filing jointly. This is on the gain, not the sale price.
My mom wants to eventually sell the building that my grandmother left her when she passed in 2006, she should have tried selling it during covid so yeah she regrets that..the value when it was purchased was 700,000 now its probably worth 1.6 mil, its more of a hassle than its worth, if she could find a buyer that would be great, but it would be great to have the capital gains taxes removed from it