Grade I listed · Kensington and Chelsea

Cosmic House

Cosmic House is a Grade I listed building in Kensington and Chelsea, first listed on 4 May 2018. It is one of 18 Grade I entries among 1,341 listed buildings in Kensington and Chelsea; 99% of Kensington and Chelsea’s current entries were listed before it.

List entry
Field	Value
Name	Cosmic House
Grade	Grade I — exceptional interest
List entry number	1450124
Date first listed	4 May 2018
Local planning authority	Kensington and Chelsea
Location	51.50863, -0.20741 (map)
Official record	Historic England list entry 1450124

Planning works on this listed building?

Planium checks which consents Kensington and Chelsea will require for your works on Cosmic House, 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 Cosmic House

Name	Grade	Distance
16-26, Clarendon Road W11	II	30 m
12 and 14, Clarendon Road W11	II	48 m
43 and 45, Clarendon Road W11	II	71 m
23-29, Clarendon Road W11	II	75 m
17, 19 and 21, Clarendon Road W11	II	90 m
10 and 12, Lansdowne Road W11	II	99 m
13 and 15, Clarendon Road W11	II	106 m
6 and 8, Lansdowne Road W11	II	106 m
2 and 4, Lansdowne Road W11	II	122 m
Lansdowne House	II	148 m

Frequently asked questions

Is Cosmic House listed?

Yes. Cosmic House is on the National Heritage List for England as a Grade I listed building, list entry number 1450124, first listed on 4 May 2018. The full list entry with its description and map is on Historic England’s website.

Do I need consent for works to Cosmic House?

Works that affect its character as a building of special architectural or historic interest — inside or out — need listed building consent from Kensington and Chelsea, 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.