There isn't one useful number because the scope of outdoor living projects varies significantly.
A project may involve a patio and landscape improvements, while another may include a pool, pavilion, outdoor kitchen, substantial concrete, drainage, utilities, lighting, landscaping, retaining, and other construction.
Site access, grading, demolition, existing conditions, materials, structures, utilities, and the amount of coordination required all affect the investment.
That's why we discuss your targeted comfort zone of investment early. It helps us understand what you're hoping to accomplish and where we may need to prioritize before designing a project that doesn't align with what you intended to invest.