Grade I listed · Westminster

1-21, Cornwall Terrace Nw1

1-21, Cornwall Terrace Nw1 is a Grade I listed building in Westminster, first listed on 9 January 1970. It is one of 205 Grade I entries among 3,996 listed buildings in Westminster; 13% of Westminster’s current entries were listed before it.

List entry
FieldValue
Name1-21, Cornwall Terrace Nw1
GradeGrade I — exceptional interest
List entry number1356971
Date first listed9 January 1970
Local planning authorityWestminster
Location51.52407, -0.15736 (map)
Official recordHistoric England list entry 1356971

Planning works on this listed building?

Planium checks which consents Westminster will require for your works on 1-21, Cornwall Terrace Nw1, 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 I buildings are of exceptional interest — only about 2.5% of listed buildings in England. Any application for listed building consent is notified to Historic England, and alterations are scrutinised closely.

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 1-21, Cornwall Terrace Nw1

NameGradeDistance
Drinking Fountain at Junction of Allsop Place and Baker StreetII56 m
10 Lampstandards in Front of Cornwall Terrace 10 Lampstandards in Front of Cornwall Terrace Outer CircleII70 m
Gate Piers and Garden Railings to Number 1 Cornwall TerraceII89 m
231-243, Baker Street Nw1II89 m
The Volunteer Public HouseII92 m
2 Gate Piers with Lamps Flanking RoadII108 m
Garden Railings to Clarence Gate LodgeII114 m
Clarence Gate LodgeII122 m
13, Allsop PlaceII131 m
Forecourt Garden Railings to Numbers 20 and 21I135 m

Frequently asked questions

Is 1-21, Cornwall Terrace Nw1 listed?
Yes. 1-21, Cornwall Terrace Nw1 is on the National Heritage List for England as a Grade I listed building, list entry number 1356971, first listed on 9 January 1970. The full list entry with its description and map is on Historic England’s website.
Do I need consent for works to 1-21, Cornwall Terrace Nw1?
Works that affect its character as a building of special architectural or historic interest — inside or out — need listed building consent from Westminster, 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.