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Marconi's First Radio Factory

A Grade II Listed Building in Chelmsford, Essex

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Latitude: 51.7294 / 51°43'45"N

Longitude: 0.4747 / 0°28'29"E

OS Eastings: 571002

OS Northings: 206305

OS Grid: TL710063

Mapcode National: GBR PKK.DW4

Mapcode Global: VHJK2.5STM

Entry Name: Marconi's First Radio Factory

Listing Date: 6 February 1974

Last Amended: 14 December 1978

Grade: II

Source: Historic England

Source ID: 1141330

English Heritage Legacy ID: 352506

Location: Chelmsford, Essex, CM2

County: Essex

District: Chelmsford

Town: Chelmsford

Electoral Ward/Division: Moulsham and Central

Built-Up Area: Chelmsford

Traditional County: Essex

Lieutenancy Area (Ceremonial County): Essex

Church of England Parish: Moulsham St John the Evangelist

Church of England Diocese: Chelmsford

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Listing Text

This list entry was subject to a Minor Amendment on 10/11/2016

TL 7006 SE 5/63
TL 70 NW 7/63

The Old Silk Mill Building and 1 Hall Street
Marconi's First Radio Factory

(Formerly listed as The Old Silk Mill Building and 1 Hall Street, previously listed as "Marconi" Radio Factory, HALL STREET, and previously listed as Marconi's first radio factory under Hall Street/Mildmay Road)


Former silk mill, built by John Hall of Coggeshall in 1856. Acquired by the Courtaulds of Braintree in 1865, then by Marconi in 1899 and used as the world’s first wireless factory. Of gault brick with parapetted south facade having Tuscan pilasters and partly stuccoed entablature with brick dentil course over radiused corner. Brick plinth. Two-storeys with metal industrial type windows having glazing bars and segmental brick arches. Roof clad with slate, plan roughly square with one curved corner. Plaque on the east wall commemorates Marconi's first factory. Converted into 6 flats and a commercial unit in 2016.

Listing NGR: TL7100206305

This text is from the original listing, and may not necessarily reflect the current setting of the building.

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