How much does it cost to build a backyard playground?

Depending on the size and features of your playground, it could cost anywhere from a few hundred dollars to $10,000 or more. Materials like metal pipes, plastic slides, and swings can be expensive, and professional installation is often recommended to ensure the safety of your children. If you're handy with tools and have some basic carpentry skills, you could save some money by building the playground yourself. But be sure to follow all safety guidelines when doing so, as backyard playgrounds can be dangerous if not installed correctly.

This a very vague question. It all depends on what you want to do and how big the plaground is. Best is to get free estimates from a professional.