John Aird & Co.
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| Company type | Private |
|---|---|
| Industry | Construction |
| Founded | 1848 |
| Defunct | 1990s |
| Fate | Withdrew from Civil engineering |
| Headquarters | London, UK |
Key people | Sir John Aird, Jnr, (Chairman) |
John Aird & Co. was once a leading British civil engineering business based in London.
The company was founded in 1848 by John Aird (1800–1876) with the objective of laying mains for gas and water companies in London.[1]
In 1851 Aird was joined by his son, also called John, and the business was for a while known as John Aird & Sons. John Aird, Jnr was the real driver behind the business.[1]

Structure
After the company began collaborating with Lucas Brothers, their combined businesses were re-organised in 1870 as follows:[1]
- Lucas Brothers - Building
- Lucas and Aird - Railway work and civil engineering
- John Aird & Sons - Water and gas contracts
In 1895, when Sir Charles Lucas died, the businesses were reorganised again:[1]
- John Aird & Co. - Railway work and civil engineering
- Aird & Sons - Water and gas contracts