Whether or not planning permission is needed for a playhouse will depend on a few factors.
Playhouses are typically regarded as temporary structures, but the maximum size of a playhouse that can be housed on your property without a permit depends on where you live.
A single story structure less than 200 ft² is usually exempt from permit rules, but your municipality has its own specific bylaws regarding sizing. A lower square footage might be the limit in urban centers, whereas a rural township often allows larger playhouses to exist without permission.
To be exempt from a permit, a playhouse cannot be an accessory dwelling unit (ADU). Accessory dwelling units are defined as a secondary dwelling attached to, or on, the same property as a single family home. This includes basement apartments, tiny homes, and in-law suites.
If your playhouse includes utilities like plumbing or electricity, or if it exceeds the maximum square footage and height set out by your municipality, it may require a permit. It’s critical to do this research about laws in your area before you begin construction or purchase big playhouses for sale to ensure you obtain proper permits as required.