There is no online site that is going to accurately estimate the value of a Novi home today. We are in a rapidly changing real estate market in Metro Detroit, and sites like zillow.com have admitted that they do not have complete date on our market. If you need a rough estimate, use the city assessors value. Otherwise, call a Realtor or hire an appraiser.
Interview three Realtors (Get their opinion of value), if it is worth several hundred dollars for you to find out or double check against the Realtors opinions, hire an appraiser. Visit other homes in the area that are being offered for sale (Then watch closely to find out what their actual sales prices were) but have your friends and or family join you so that you can get an objective third party opinion in addition to your own.
Hi Ann! Thanks for your question. As other agents have mentioned, it's best to have a Realtor go over a Comparative Market Analysis (they are free). Although an appraiser can perform an appraisal for value purposes, it doesn't always reflect what a Buyer would be willing to pay for the house and there is a fee for their services. It just depends on the reason you are looking to find out the value of your home. I specialize in the Novi area so please feel free to call or email me to go over your specific situation. I also have a few appraisers I could recommend too. Have a great day!