It is best to get in contact with a realtor. Realtor via MLS have up to minute active and sold comparables. Ask for FREE market analysis. They should be able to provide online. Appraiser rule of thumb 3 active listings and 3 sold comparables. All comparable should be within 0.50 miles from subject. Solds should be within last 6 months preferrable 3 months. Comparable homes and subject should have similar features: bedrooms, baths, square footage, age and lot size. Generally, in the immediate area features are similar. Value will be influences if subject in fair condition, average condition, updated or new construction. Do not hesitate contacting realtor and asking for analysis.