Grade I listed · Hounslow

Chiswick House Conservatory

Chiswick House Conservatory is a Grade I listed building in Hounslow, first listed on 21 May 1973. It is one of 32 Grade I entries among 512 listed buildings in Hounslow; 36% of Hounslow’s current entries were listed before it.

List entry
FieldValue
NameChiswick House Conservatory
GradeGrade I — exceptional interest
List entry number1079611
Date first listed21 May 1973
Local planning authorityHounslow
Location51.48540, -0.25772 (map)
Official recordHistoric England list entry 1079611

Planning works on this listed building?

Planium checks which consents Hounslow will require for your works on Chiswick House Conservatory, 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 Chiswick House Conservatory

NameGradeDistance
Series of Urns in Italian Garden of Chiswick HouseII58 m
Retaining Walls of Pond in Chiswick ParkII79 m
Deer House in Chiswick Park Near Italian GardenI99 m
Inigo Jones'S Gateway in Chiswick ParkI114 m
Doric Column in Chiswick Park North East of ConservatoryI119 m
Chiswick House Lodge Opposite Corney RoadII167 m
Ornaments Lining Avenue to Rear of Chiswick HouseI169 m
Three Male Statues from Hadrian'S Villa in Chiswick ParkI189 m
Chiswick HouseI197 m
Convent of St Mary Hospital of St JosephII219 m

Frequently asked questions

Is Chiswick House Conservatory listed?
Yes. Chiswick House Conservatory is on the National Heritage List for England as a Grade I listed building, list entry number 1079611, first listed on 21 May 1973. The full list entry with its description and map is on Historic England’s website.
Do I need consent for works to Chiswick House Conservatory?
Works that affect its character as a building of special architectural or historic interest — inside or out — need listed building consent from Hounslow, 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.