Webit costs $100 to $150 per sq ft to build a house in florida. This averages to $297,000 excluding land costs. Land may cost you around $150,000. Building a house in florida can be a significant investment, but it offers the potential for substantial returns through increased property value and personal satisfaction. Understanding the costs involved and the different. Webthe typical cost to build a house in florida ranges between $240,000 and $350,000, or an average of $295,000. Factors that affect the cost of building a new house include size, location, materials, and features. Cost overruns or unexpected expenses are common.