I echo the caution about online estimators. For example, regarding the ones mentioned in the answers below, the wachovia tool is way off for Albuquerque. I tried it on 3 of my own homes and none of the tool response ranges even captured any of my values. In fact, the midpoint on all 3 value ranges was about 50% low for each of my houses - all in different areas and price ranges! For getmyhomesvalue.com, they require contact info, so that they can sell your info as a lead to a realtor - just click on their small link at the bottom of their homepage to see how they plan to sell your personal contact info! Assessing an accurate and current market value is one of the most valuable services a real estate professional can provide. Ask 2 or 3 local agents to provide a value to you and ask them how they arrived at that value. WIthout a lot of detail, you can compare $/sqft to similar homes of similar size, features, and upgrades that have recently sold. However, there are seasonal and market trends that may affect you even within just a few short months, which professional keeps on top of and can surely take into account for you. If you just want a quick online tool, try zillow.com, which has been getting more and more accurate as they add data and tweak algorithms. It is completely free and does not require any personal information; however, it still lacks the ability to know subtly differences between areas. It is generally pretty accurate, but I have still recenty seen it be off by up to 20%. Contacting an agent also costs you nothing and gets you lots more valuable information. Best of luck to you!