Complete with nine bedrooms, a wine vault and state-of-the-art cinema room, a £15 million "French Chateau" in Radlett is on sale.

Halcyon Hall in Newlands Avenue is hosting an open house on Saturday, April 29 by appointment only, with the property boasting 15,000 sq ft of living accommodation and 1.2 acres of landscaped gardens.

Welwyn Hatfield Times: The home boasts a wine vault and cinema room.The home boasts a wine vault and cinema room. (Image: Luxury Property Partners)

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Listing agent, Luxury Property Partners, described the mansion as "magnificently built and finished to exceptional standards with no expense spared".

"This incredible house blends the character and charm of a mediaeval French Chateau while delivering all the best of modern open plan living with the elegance of tradition," they continued.

Welwyn Hatfield Times: Halcyon Hall in Radlett.Halcyon Hall in Radlett. (Image: Luxury Property Partners)

"This house is truly unique."

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Completed in 2006 and recently refurbished, Halcyon Hall offers the best of home automation with full Crestron AV integration, Lutron lighting, a passenger lift to all floors including the basement and the nearly 5,000 sqft of loft storage.

There is also underfloor heating, air conditioning and air handling systems throughout.

To find out more about Halcyon Hall, visit