Sea Lock and Basin

SEA LOCK AND BASIN, LOCKSWAY ROAD

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Overview

Heritage Category:
Listed Building
Grade:
II
List Entry Number:
1333170
Date first listed:
18-Mar-1999
List Entry Name:
Sea Lock and Basin
Statutory Address:
SEA LOCK AND BASIN, LOCKSWAY ROAD
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Location

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Archive image, may not represent current condition of site.
Date:
2001-02-28
Reference:
IOE01/00234/11
Rights:
© Mr Mark Bardell. Source: Historic England Archive

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Official list entry

Heritage Category:
Listed Building
Grade:
II
List Entry Number:
1333170
Date first listed:
18-Mar-1999
List Entry Name:
Sea Lock and Basin
Statutory Address 1:
SEA LOCK AND BASIN, LOCKSWAY ROAD

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:
SEA LOCK AND BASIN, LOCKSWAY ROAD

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

District:
City of Portsmouth (Unitary Authority)
Parish:
Non Civil Parish
National Grid Reference:
SZ 67842 99912

Details

PORTSMOUTH

SZ69NE LOCKSWAY ROAD, Milton 774-1/6/56 Sea Lock and Basin

II

Sea lock and basin. 1823. Probably by Josias Jessop. Red brick in English bond. Roach bed Portland stone dressings. North and south walls have 2 narrow recessed panels at east and west ends, which housed gates and posts. Gates and posts missing except for part of the original oak posts at west end. The upper iron post holding straps are set in the stone coping. West end has curved wall on each side at entrance to basin. Stone rusticated quoins and deep coping stones at ground level. Areas of coping are missing. East projection into Langston Harbour is foreshortened with brickwork rakes down at ends, late C20. Later cranked iron bridge at west end of lock. Sides of basin recently partially restored. This is the only surviving section of the Portsea Canal which was part of the Portsmouth and Arundel canal. (Vine PAL: London's Lost route to the Sea: David & Charles N. Abbot: 1956-1973: 58-65).



Listing NGR: SU6610802158

Legacy

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

Legacy System number:
474849
Legacy System:
LBS

Sources

Books and journals
Vine, PAL, Londons Lost Route to the Sea, (1986), 58-65

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 Sea Lock and Basin

Map

This map is for quick reference purposes only and may not be to scale. This copy shows the entry on 13-Jun-2026 at 23:21:27.

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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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