Boundary Wall to West of Hm Young Offenders Institution is a Grade II listed building in the Dorset local planning authority area, England. First listed on 17 May 1993. Boundary wall. 2 related planning applications.

Boundary Wall to West of Hm Young Offenders Institution

WRENN ID
pale-merlon-yarrow
Grade
II
Local Planning Authority
Dorset
Constituency
South Dorset MP: Lloyd Hatton (Lab)
Country
England
Date first listed
17 May 1993
Type
Boundary wall
Address
Boundary Wall to West of Hm Young Offenders Institution, Grove Road, Portland, DT5 1DZ
OS grid reference
SY 701 722
Coordinates
50.5496, -2.42283
Source
Historic England listing

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

Description

The boundary wall to the west of HM Young Offenders Institution was built in 1848 and is made of squared dressed Portland stone. This very tall wall features a series of raised sections and runs from north to south for 26 bays, which are divided by flat pilasters. It then returns towards the Gatehouse with 2 additional bays, making the total length approximately 520 meters. The wall rises about 7 meters high, reaching around 9 meters in the raised sections. Together with the boundary wall to the north of Grove Road and the walls associated with the Church and School group, this wall is an important visual feature of the street.

Local climate

Boundary Wall to West of Hm Young Offenders Institution receives an average of 840 mm of rain a year. This makes it wetter than 55% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 77% of listed buildings.

It experiences an average of 13 freeze-thaw cycles a year, fewer than 88% of listed buildings. Of these, 5 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.

More on this building

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  • No EPC on record for this property
  • No sale records on file
  • Related listed building consents — 2 applications
  • Detailed attributes — period, style, materials, features
  • Flood risk assessment
  • Radon risk assessment
  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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Nearby listed buildings

  1. Hm Young Offender Institution, West Cell Block Grade II 52 m
  2. Hm Young Offenders Institution Gatehouse, with Vr Letter Box Grade II 84 m
  3. Governor's House with Front Boundary Wall Grade II 86 m
  4. Hm Young Offender Institution, E Hall Grade II 98 m
  5. Hm Young Offender Institution, East Cell Block Grade II 101 m
  6. Hm Young Offender Institution, Overseer's Hut with Inclines Grade II 120 m
  7. Hm Young Offender Institution, North and East Boundary Walls Grade II 126 m
  8. Ventilator Shaft at Ngr Sy 7028 7217 Grade II 186 m
  9. Ventilator Shaft at Ngr Sy 7033 7237 Grade II 197 m
  10. Wash Houses and Connecting Boundary Wall to Rear of Alma Terrace Grade II 259 m