Though this seems like an easy question, it is not as simple as it sounds.
Keep in mind that much more goes into the market value of a house than it’s square footage. For example, two houses next door to each other can have the same square footage, but if one has two bathrooms and the other has only one, guess which one will probably be worth more? It will also cost more per square foot.
However, if you compare recent sales of similar homes, the cost per square foot should be similar to those properties. You can ask your agent to provide you with comparable sales data.