A conservatory is a building or room having glass or other transparent roofing and walls, used as a greenhouse or a sunroom. Usually, it refers to a space attached to a conventional building such as a house, especially in the United Kingdom.

In the UK, the legal definition of a conservatory is a building that has at least 50% of its side wall area glazed and at least 75% of its roof glazed with translucent materials, either polycarbonate sheeting or glass. Today, the terms sunroom, solarium and conservatory are used interchangeably by the public, but in general, the term conservatory and particularly English conservatory evoke the image of an ornate structure, echoing the traditions of that Victorian-era of conservatory building. Modern conservatories tend also to be graced with a traditional cresting and finial, along with single, double patio or even bi-folding doors.


These structures have been designed and built around the world, in private gardens, parks, and botanical institutions. Smaller garden conservatories have become popular, which may be dual-function, equally devoted to horticulture and recreation, or favour the latter, as a solarium or sunroom.

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