Grade II listed · Cornwall

Railway Viaduct Including Redundant Piers, Over River Allen

Railway Viaduct Including Redundant Piers, Over River Allen is a Grade II listed building in Cornwall, first listed on 29 January 1991. It is one of 11,797 Grade II entries among 12,596 listed buildings in Cornwall; 91% of Cornwall’s current entries were listed before it.

List entry
Field	Value
Name	Railway Viaduct Including Redundant Piers, Over River Allen
Grade	Grade II — special interest
List entry number	1201434
Date first listed	29 January 1991
Local planning authority	Cornwall
Location	50.26746, -5.05367 (map)
Official record	Historic England list entry 1201434

Planning works on this listed building?

Planium checks which consents Cornwall will require for your works on Railway Viaduct Including Redundant Piers, Over River Allen, lists what the heritage statement must cover and drafts the application text.

Ask Planium what consent you need

What the grade means for works

Grade II buildings are of special interest and make up over 90% of listed buildings in England. Most alterations, extensions and many internal changes still need listed building consent from the council.

The protection covers the whole building, inside and out, plus fixtures and attached structures. Typical works that need consent: replacing windows or doors, removing walls or historic fabric, changing roof coverings, installing solar panels or external insulation, and adding extensions.

Listed buildings near Railway Viaduct Including Redundant Piers, Over River Allen

Name	Grade	Distance
Benson House	II	154 m
Friends Meeting House	II	222 m
Courtyard and Burial Ground Walls and Gate Piers to Friends' Meeting House	II	238 m
24 and 25, Pydar Street	II	267 m
22 and 23, Pydar Street	II	276 m
8-11, Truro Vean Terrace	II	283 m
21 and 21a, Pydar Street	II	284 m
20, Pydar Street	II	286 m
Mission Church of St Mary and Adjoining Lych Gate and Chest Tomb	II	288 m
19 and 19a, Pydar Street	II	295 m

Frequently asked questions

Is Railway Viaduct Including Redundant Piers, Over River Allen listed?

Yes. Railway Viaduct Including Redundant Piers, Over River Allen is on the National Heritage List for England as a Grade II listed building, list entry number 1201434, first listed on 29 January 1991. The full list entry with its description and map is on Historic England’s website.

Do I need consent for works to Railway Viaduct Including Redundant Piers, Over River Allen?

Works that affect its character as a building of special architectural or historic interest — inside or out — need listed building consent from Cornwall, in addition to any planning permission or building regulations approval. Like-for-like repairs often do not, but confirm with the council’s conservation officer before you start.

Source: National Heritage List for England, © Historic England 2026, via planning.data.gov.uk. Contains Ordnance Survey data © Crown copyright and database right. Licensed under the Open Government Licence v3.0. Retrieved 12 October 2026. Local authority assigned from the list entry point. This page is a summary — the legal record is the official list entry.