Aviary Terrace in Powis Castle Gardens is a Grade I listed building in the Powys local planning authority area, Wales. First listed on 11 March 1981. Hall.

Aviary Terrace in Powis Castle Gardens

WRENN ID
seventh-column-thrush
Grade
I
Local Planning Authority
Powys
Constituency
Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
Country
Wales
Date first listed
11 March 1981
Type
Hall
Address
Aviary Terrace in Powis Castle Gardens, Welshpool, SY21 8RG
OS grid reference
SJ 216 064
Coordinates
52.64991, -3.16017
Source
Cadw listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

Aviary Terrace is located in the gardens of Powis Castle and is believed to have been designed by William Winde, who worked on the castle and its London residence in the late 17th century. While there is no definitive date for the gardens, they likely began after 1668 and were mostly completed by 1705. Adrian Duvall, a Frenchman, is also associated with the gardens from 1703, credited with creating the terraces and the hydraulics for the lost water-garden.

The terrace features stone steps with stone copings leading down from the top terrace to the aviary, which is the focal point of the area. The aviary is symmetrically arranged as an arcaded structure with seven bays, where the central three bays are slightly advanced. It is constructed of brick with moulded stone imposts. To the left of the aviary, there is a wide arched niche with rusticated stone quoins and voussoirs, while a similar arch is depicted in an illustration from 1742. On either side of the aviary, a brick revetment wall with a rubble base and stone copings serves as the retaining wall for the top terrace. To the left, another wall descends in curves, maintaining the level of the aviary terrace at its western end.

Aviary Terrace is listed at grade I for its significance as part of the exceptional late 17th-century terraced gardens at Powis, representing a very rare example of an Italianate garden in Britain.

Local climate

Aviary Terrace in Powis Castle Gardens receives an average of 900 mm of rain a year. This makes it wetter than 67% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 58% of listed buildings.

It experiences an average of 42 freeze-thaw cycles a year, more than 81% of listed buildings. Of these, 23 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

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Nearby listed buildings

  1. Orangery Terrace in Gardens at Powis Castle Grade I 10 m
  2. Brick Wall to rear of Top Terrace at Powis Castle Gardens Grade I 14 m
  3. Apple Slope Terrace in Gardens at Powis Castle Grade I 34 m
  4. Powis Castle Grade I 35 m
  5. Marquess Gate with steps leading to E entrance to Powis Castle, and flanking wall to N Grade I 37 m
  6. Retaining wall to courtyard at Powis Castle Grade I 56 m
  7. Statue of Fame in entrance courtyard at Powis Castle Grade II* 60 m
  8. Statue of Hercules at E of Top Terrace in Powis Castle Gardens Grade II* 73 m
  9. Ballroom Range at Powis Castle Grade I 78 m
  10. Raised Terrace to SE of Castle with steps into garden Grade II 79 m