developed land for sale Magny-en-Vexin (95) de 5200.0m² developed land for sale Saint-Witz (95) de 11120.0m² developed land for sale Saint-Witz (95) de 5505.0m² developed land for sale Saint-Witz (95) de 26632.0m² greenfield for rent Persan (95) de 10000.0m²