Patio installations typically range from $3,000 to $10,000, depending on size, materials, and complexity. A basic 12×16 concrete paver patio runs around $4,000-$6,000, while natural stone patios with custom features can reach $8,000-$12,000. Walkways generally cost $1,500 to $5,000, with simple concrete paver walkways on the lower end and natural stone walkways with lighting and landscaping integration on the higher end. Retaining walls vary significantly based on height and engineering requirements. The biggest cost factors are material selection, site preparation requirements, and project complexity. Properties with drainage issues or difficult access require more work, which affects pricing. We provide detailed estimates that break down all costs, so you know exactly what you’re paying for.