Wellness, fitness and leisure areas may count as principal usable floor area Federal Supreme Court judgment 1C_317/2025 and 1C_319/2025 of 11 August 2026 Decision at a glance In its judgment 1C_317/2025 and 1C_319/2025 of 11 August 2026, the Swiss Federal Supreme Court clarified a key issue in Swiss second-home law. Wellness, spa, pool, jacuzzi, sauna, fitness and games areas may qualify as principal usable floor area. This may materially restrict the expansion capacity that
