The cost of designing your own website can vary depending on factors such as the platform or tools used, the complexity of your design, the need for premium features or templates, and additional expenses such as domain registration and web hosting. Website builders typically offer pricing plans ranging from free with limited features to premium plans with advanced functionality and support. CMS platforms like WordPress.org are open-source and free to use, but you may incur expenses for hosting, themes, plugins, and other add-ons.