To afford a $300,000 house, the required salary depends on factors like location, down payment, and credit score. Generally, it's recommended to spend no more than 28% of your gross monthly income on housing expenses. With a 20% down payment, an annual income of around $75,000 would be needed. Remember to consult a financial advisor for personalized advice. The cost of sewer and water is an essential utility bill that should also be considered when budgeting for homeownership.