L'éco-Domaine du Chalonge hosts seminars, study days, weddings and private parties for 10 to 210 people, with 23 bedrooms and 82 beds on site. The estate stands in Héric, in the Loire-Atlantique, about 30 minutes from Nantes, in a park of 22 hectares.
Seminars and company events
The domain lists six seminar rooms for up to 150 people, and up to 200 since the Grands Chênes room opened in summer 2026. Formats include residential seminars, study days, team building, roadshows and events with a CSR theme. Every room is independent and looks onto the park. Equipment includes fibre Wi-Fi, a video projector, a portable screen, a microphone and Bose speakers in the sound-equipped room, paperboards and natural daylight. For breaks, the site offers a tennis court, a pétanque court, a billiard table, Mölkky and board games, as well as wellness workshops for companies.
Weddings and receptions
The domain takes weddings of up to 150 seated guests and 200 for a cocktail. Three connected reception rooms, the Salles Cathédrale, form the historic core, with stone walls, exposed beams and a terrace over the park and the pond. The Grands Chênes room, a contemporary barn-style hall of 200 m², seats 200 and is described as suitable in all seasons. The Barnum, 175 m² with a wooden floor, adds a covered open-air option for cocktails and dinners. The team recommends caterers and other providers. An outdoor pool, open from May to October, and a Nordic sauna complete the stay.
Rooms and capacities
Grands Chênes: 200 m², 200 people seated or standing, with a 37 m² caterer office. Salles Cathédrale: 174 m² in total, 210 for a cocktail, 140 seated. Salle Cathédrale: 71 m². Salle Chambell: 54 m². Salle du Vieux Pressoir: 47 m². Barnum: 175 m², 200 for a cocktail, 150 seated. The seminar page also lists the Araucaria, Marronnier, Châtaignier and Tilleul rooms for smaller groups.
Accommodation
The domain has 23 bedrooms and 82 beds. For seminars it counts 23 people in single rooms, 46 in double or twin rooms and 72 in shared rooms of three to six beds. Cottages are also available to book, and they suit wedding parties that want to stay together.
Catering
A partner chef cooks seasonal produce from local farms. Formats are a breakfast or dinner cocktail, plated service, buffet, barbecue and packed lunches. Self-catered meals are possible under conditions.
History and setting
The estate has been handed down since 1656, and the site traces it from a Roman settlement to a château and a manor. Renovation began in 2008. Today the domain follows an eco-responsible approach, with a park of 22 hectares, a pond, trees two centuries old and a permaculture vegetable garden.
Getting there
The address is Domaine du Chalonge, 44810 Héric. The site gives drive times of 20 to 30 minutes from Nantes, depending on the page.
