The Cost of Building a Guest House: Factors to Consider and Estimated ExpensesSamantha Johnson04/03Table of ContentFactors to ConsiderEstimated ExpensesConclusionFree Smart Home PlannerAI-Powered smart home design software 2025Home Design for FreeIntroductionWhether you want to provide a separate living space for guests, generate rental income, or create a home office, building a guest house can be a worthwhile investment. However, it's important to understand the costs involved before you start the project.Factors to ConsiderThe cost of building a guest house will depend on several factors, including:The size of the guest houseThe materials used for constructionThe complexity of the designThe location of the propertyThe local building codes and permits requiredEstimated ExpensesAccording to HomeAdvisor, the average cost to build a guest house is between $80 to $200 per square foot. So, for a 600 square foot guest house, you can expect to pay between $48,000 to $120,000.Other expenses to consider include:Architectural and engineering feesPermit fees and inspectionsSite preparation and excavationFoundation and framingRoofing, windows, and doorsElectrical, plumbing, and HVAC systemsInterior finishes, such as flooring, cabinets, and appliancesConclusionBuilding a guest house can be a significant investment, but it can also add value to your property and provide a versatile living space. Consider all of the factors and estimated expenses before starting the project to ensure that it aligns with your budget and goals.Ready to start your guest house project? Visit Coohom for design inspiration and tools to bring your vision to life.Home Design for FreePlease check with customer service before testing new feature.