Château de Grilly – Exceptional heritage and development potential

In the heart of the Pays de Gex, just minutes from Geneva International Airport, Château de Grilly embodies more than two thousand years of history. Built on the site of an ancient Roman military fort dating from 45 BC, the castle and its grounds have been carefully restored since the 1990s. The castle has been partially listed as a Historic Monument since 1987.

The castle offers 518 sqm of living space, arranged over two floors and two towers, with generous reception areas and seven bedrooms. It retains valuable architectural features: period fireplaces, coffered ceilings, a dressed-stone staircase, carved surrounds and traces of its defensive past.

On the uppermost level, a floor area of approximately 200 sqm beneath a remarkable, carefully restored centuries-old roof structure offers the possibility of creating up to two additional apartments. Architectural plans are available upon request.

The castle roof has been completely renovated, particularly with regard to waterproofing and insulation, representing a major heritage asset. The configuration of the two towers also makes it possible to consider converting them into two separate, independent dwellings.

On a 2,019 sqm plot with courtyards and garden, an independent 83 sqm caretaker’s house comprising two bedrooms provides additional space that could be used for staff accommodation or a rental project, subject to the necessary works.

Another major advantage: an approved building permit allows for the construction of a residential building comprising four high-end apartments on the site of a former Gessian farmhouse. Designed with respect for the heritage setting, the project provides for approximately 705 sqm of declared floor area and twelve parking spaces.

Overall, the estate has potential for nine apartments, including the outbuilding, in addition to the castle’s principal living spaces arranged over two floors. The additional conversions envisaged within the castle do not yet have approved authorisations. An architect has nevertheless already studied these possibilities and can prepare the corresponding projects.

This rare property combines a prestigious historic residence, an exceptional lifestyle setting close to French-speaking Switzerland and already structured development potential. A unique opportunity for a large-scale family or heritage project.

E&V reference: W-04C8FI

The castle estate is not subject to an Energy Performance Certificate (DPE) due to its protection as a Historic Monument. A technical file relating to the buildings is available upon request.

Sale price: €5,200,000 Transaction fees of 4% including VAT, payable by the seller.

Information on the risks to which this property is exposed is available on the Géorisques website: www.georisques.gouv.fr.