Factories, garages, works, etc., as listed in 1963. Names of businesses listed by first letter, from G to I.
- W.H. Gaze & Sons, Ltd
- George Cycle Works
- A. Gilbey & Sons, Ltd
- Gill and Robson
- M.J. Gleeson (Contractors) Ltd
- Goodwear Ltd
- L. Greenham
- Gresham Motors Ltd
- Hadfields (Merton) Ltd.
- Hall & Co., Ltd.
- R.J. Hamer & Sons (Paints), Ltd.
- Hancock, Corfield and Waller, Ltd
- Miss A.E. Hansford
- R.E. Hardy
- William Harland & Son, Ltd.
- H.J. Hawkins
- L. Harris & Son
- Hazmax Ltd
- Hendra Engineering Co., Ltd
- Hill Simpson Ltd.
- Hudson & Smurthwaite, Ltd
- Hudson V-Block, Ltd.
- F. Hull & Son, Ltd.
- Hunterseal Ltd.
- Huntley & Sparks, Ltd.
- Hupfield Plant
- Hygienic Wireworks, Ltd.
