Establishing the value of a property -- without selling it is part art/part science.When you sell your home on the open market, you are likely to get a fair price and an accurate value. The true value of your property is whatever someone is willing to pay.However, realtors and mortgage lenders must use various criteria when pricing a home. Perhaps the most compelling way to value a home is to look at the average price per square foot of recently sold homes. You can apply these averages to your own home's square footage and lot size. Appraisers also assess upgrades and maintenance issues on a property. Your school district, neighborhood, style of home and other criteria will ultimately impact the value of your home.www.zillow.com is an interesting web site that uses these types of criteria to help individuals figure out what their home should be valued at.I am not sure why you think your home is currently valued at the price you mention. However, to get a Reverse Mortgage, your property would have to be appraised and your ultimate loan amount would be driven by that appraisal. You can estimate your Reverse Mortgage loan amount by playing with a Reverse Mortgage calculator here:http://www.newretirement.com/Services/Reverse_Mortgage_Calculator.aspxOr, talk with a pre qualified Reverse Mortgage lender by sending your information, here:https://www.newretirement.com/Services/Reverse_Mortgage_Advice.aspx?ReverseMortgageAdviceTab.DateOfBirth=1/1/1943&ReverseMortgageAdviceTab.HouseValue=150000&ReverseMortgageAdviceTab.MortgageBalance=50000