Do I Need a Permit to Build a Shed or Outbuilding?
Whether you need a permit for a shed depends on its size, height, and location. Most US jurisdictions exempt sheds under 120–200 sq ft without electrical or plumbing, but setback and HOA rules still apply. In Europe, small garden structures are often permit-free below a size threshold, but anything with a foundation, electricity, or plumbing usually requires at least a notification.
Do you need a permit?
Sometimes
What triggers a permit
- Shed exceeds the local size threshold (typically 120–200 sq ft / 10–20 m²)
- Structure will have electrical wiring, plumbing, or a concrete foundation
- Shed is placed within the setback zone (too close to property lines or easements)
- Structure exceeds the maximum height limit (often 10–12 ft / 3–4 m)
- Shed will be used as habitable space (home office, ADU, or guest house)
Country-by-country detail
Verenigde Staten
Sometimes
- Permitting authority
- Local Building Department / Zoning Office
- Typical fee
- $50–$500
Most US jurisdictions exempt accessory structures under 120–200 sq ft that sit on skids or blocks (no permanent foundation), have no electrical or plumbing, and meet setback requirements. Larger sheds, any shed with utilities, and sheds on permanent foundations require a building permit. HOA covenants may impose additional restrictions on size, style, or placement even when the city doesn't require a permit. Always check both the municipal building code and HOA rules before construction.
Polen
Sometimes
- Permitting authority
- Starostwo Powiatowe / PINB
- Typical fee
- PLN 0–1 000
Polish law (Prawo budowlane) exempts certain small structures: free-standing buildings up to 35 m² with a max height of 5 m (flat roof) or 4.8 m (gable) on plots over 500 m² require only a zgłoszenie (notification), not a full permit. Structures exceeding these thresholds or on smaller plots require a pozwolenie na budowę. Any electrical or plumbing connections add their own notification requirements.
Nederland
Sometimes
- Permitting authority
- Omgevingsloket / gemeente
- Typical fee
- €0–€400
Under the Dutch Omgevingswet, small garden structures (bijgebouw) in the backyard are often vergunningvrij if they don't exceed 30 m², are no taller than 3 m at the ridge, cover no more than 50% of the yard, and sit behind the front façade line. Larger structures, those with utilities, or those in protected areas (beschermd stadsgezicht) require an omgevingsvergunning via Omgevingsloket. The municipality's bestemmingsplan may impose additional restrictions.
Spanje
Sometimes
- Permitting authority
- Ayuntamiento (Urbanismo)
- Typical fee
- €100–€500
Spanish municipal planning rules vary by municipality, but most require at minimum a comunicación previa or licencia de obra menor for any new structure, regardless of size. In rural areas, additional restrictions from the plan urbanístico may apply. Structures with electricity or plumbing require their respective installation certificates (Boletín Eléctrico, certificado de fontanería).