http://www.zillow.com/advice-thread/How-do-you-compare-tax-value-vs-market-value-on-a-tract-of-land-without-structures-vs-with-structure/182254/ Zillow Advice | Zillow Real Estate http://www.zillow.com/advice-thread/How-do-you-compare-tax-value-vs-market-value-on-a-tract-of-land-without-structures-vs-with-structure/182254/ You need to contact an appraiser. Zillow cannot answer this question for you and neither can the seller. Sellers know how much they will accept in a sale, but they are not appraisers. Tax values are not a reliable way to determine value either. A <a href="http://www.zillow.com/directory/real-estate-agents/">realtor</a> may be able to give you preliminary guidance with a CMA and that might help you make a solid decision. Frankly though, your question as to built value vs land value would be best answered by an appraiser due to the number of variables involved. I would not trust the seller's valuation or the tax value period. Mon, 29 Dec 2008 17:57:00 GMT http://www.zillow.com/advice-thread/How-do-you-compare-tax-value-vs-market-value-on-a-tract-of-land-without-structures-vs-with-structure/182254/ 2008-12-29T17:57:00Z