Château de Grouchy – Osny

Château de Grouchy: historic reception rooms in Osny

Château de Grouchy is a historic landmark and municipal property in Osny, in the Cergy-Pontoise area of Val-d’Oise. Its park surrounds an eighteenth-century building with salons that can be reserved subject to conditions set by the town council. It provides a characterful municipal setting for local family events, community meetings and professional gatherings, provided the intended use is authorised.

Rooms and permitted guest numbers

The municipality describes a 77 m² dining room accommodating approximately 60 seated or 80 standing guests and salons of around 52 m² seating about 30 each, depending on configuration. One room or several may be rented according to municipal regulations. Capacities for separate rooms must not be added together without prior authorisation. Renting a reception room does not automatically make the entire château or public park exclusive to your event.

Suppliers, equipment and accessibility

The rental covers the spaces and any furniture agreed for the times stated in the booking contract. Catering, music, entertainment, deliveries and cleaning must follow the site’s regulations, safety requirements and public-building status. Availability may depend on the town hall’s programme. Hiring the salons does not mean that a civil wedding ceremony or access to the municipal offices is included. Ask about accessible routes, toilets and any rules for outside suppliers.

Indicative municipal rates

Published municipal rates describe, for example, dining-room hire of about €1,300 on weekdays and €1,620 at weekends, with a three-salon arrangement at around €2,620 for a weekend. These figures are indicative; confirm the current year and the applicant’s eligibility directly with the town. A deposit, insurance and additional conditions may apply. Obtain the formal tariff schedule and agreement before booking.

Location and enquiries

The château is at 14 rue William-Thornley, 95520 Osny, France. When contacting the municipality, specify the type of event, date, number of people, rooms required, catering needs and any accessibility arrangements. Request a visit and a written breakdown of the rooms, permitted hours and equipment included.

In brief

Château de Grouchy offers historic municipal reception rooms in Osny, with different capacities and public-hire rules. Its spaces are suitable only for events authorised by the town council; a room booking is not a private hire of the entire estate.