HM Young Offender Institution, East Cell Block

HM YOUNG OFFENDER INSTITUTION, EAST CELL BLOCK, THE GROVE

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Overview

Heritage Category:
Listed Building
Grade:
II
List Entry Number:
1206165
Date first listed:
17-May-1993
List Entry Name:
HM Young Offender Institution, East Cell Block
Statutory Address:
HM YOUNG OFFENDER INSTITUTION, EAST CELL BLOCK, THE GROVE
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Location

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Official list entry

Heritage Category:
Listed Building
Grade:
II
List Entry Number:
1206165
Date first listed:
17-May-1993
List Entry Name:
HM Young Offender Institution, East Cell Block
Statutory Address 1:
HM YOUNG OFFENDER INSTITUTION, EAST CELL BLOCK, THE GROVE

The scope of legal protection for listed buildings

This List entry helps identify the building designated at this address for its special architectural or historic interest.

Unless the List entry states otherwise, it includes both the structure itself and any object or structure fixed to it (whether inside or outside) as well as any object or structure within the curtilage of the building.

For these purposes, to be included within the curtilage of the building, the object or structure must have formed part of the land since before 1st July 1948.

Understanding list entries

Corrections and minor amendments

The scope of legal protection for listed buildings

This List entry helps identify the building designated at this address for its special architectural or historic interest.

Unless the List entry states otherwise, it includes both the structure itself and any object or structure fixed to it (whether inside or outside) as well as any object or structure within the curtilage of the building.

For these purposes, to be included within the curtilage of the building, the object or structure must have formed part of the land since before 1st July 1948.

Understanding list entries

Corrections and minor amendments

Location

Statutory Address:
HM YOUNG OFFENDER INSTITUTION, EAST CELL BLOCK, THE GROVE

The building or site itself may lie within the boundary of more than one authority.

District:
Dorset (Unitary Authority)
Parish:
Portland
National Grid Reference:
SY7022772341

Details

PORTLAND

SY67SE
969-1/1/145

THE GROVE, Grove
(North side)
HM Young Offender Institution, East
cell block

GV
II

Prison cell block, Grenville and Nelson wings. 1898. Fine
coursed Portland ashlar, some rock-faced masonry, slate roofs.
One of two parallel blocks, a long narrow building in 5
storeys and 29 bays, set N/S; to W bays grouped 14:1:14, and
to E 6:1:15:1:6, the single bays being projecting service
towers (not staircases). Windows are small square-headed iron
small-paned casements with external horizontal bars in
chamfered flush surrounds and very heavy weathered cills;
service towers set in returns, with plain outer wall rising to
steep coped gable. Most ground-floor windows modified, and
openings extended to meet underside of first-floor cills.
Coped gable ends on heavy 3-course kneelers have 4 x 3
close-set vertical casements in flush chamfer surrounds, but
at ground floor are 3 wide-spaced square lights, some of these
blind. Entrances at ends of block and to base of service
towers. Six lofty large square stacks with rock-faced quoins,
a plain necking band, and dentilled cappings. The eaves in two
continuous chamfered courses above bold dentils.
Interior partly inspected, retains most of original structure
and fittings: adjoining service towers are stone flush-soffit
dog-leg stairs to simple rail balustrades, cell doors
original, access balconies on cast-iron brackets, iron rod
trusses to roof with long runs of lay-lights to each slope,
and all to painted brick walls and partitions. This building,
with the Raleigh/Drake/Benbow block (qv) to the W, although of
the late C19, is a characteristically bold design, carried out
in very splendid masonry showing little signs of
discolouration or deterioration. It replaces the timber clad
1848 structures of the original prison group, and the two
blocks figure prominently in views from many parts of the
Island.

Listing NGR: SY7022772341

Legacy

The contents of this record have been generated from a legacy data system.

Legacy System number:
382036
Legacy System:
LBS

Legal

This building is listed under the Planning (Listed Buildings and Conservation Areas) Act 1990 as amended for its special architectural or historic interest.

Ordnance survey map of HM Young Offender Institution, East Cell Block

Map

This map is for quick reference purposes only and may not be to scale. This copy shows the entry on 23-Jun-2026 at 15:15:39.

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© Crown copyright [and database rights] 2026. OS AC0000815036. Use of this mapping is subject to Terms and Conditions.

End of official list entry

All text content is available under the Open Government Licence v3.0 , except where otherwise stated. Any supplied maps are © Crown Copyright [and database rights] 2026 OS AC0000815036 and may not be reproduced without permission.

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