Road or highway · United Kingdom
How much did A21 Tonbridge–Pembury dualling cost to build?
The A21 Tonbridge–Pembury dualling scheme closed a 2.5-mile single-carriageway gap between two bypasses in Kent. It created a continuous two-lane dual carriageway, added grade-separated junctions at Longfield Road and Fairthorne and provided a new route for pedestrians, cyclists and equestrians. Construction began in April 2015 and the completed road officially opened on 21 September 2017. National Highways later recorded a delivered present-value cost of GBP 102.5 million in 2010 prices, compared with an anticipated GBP 82.8 million; the increase was attributed to hazardous material encountered during ground works.
Final project cost
£102.5 million
Approximately $158.38 million
Cost basis: 2010
Cost record
How the cost changed
Budgets, contracts and final costs may cover different stages. Each figure keeps its own year and source.
Final project cost
2010£102.5 million
Approximately $158.38 million
nationalhighways.co.ukOriginal budget
2010£82.8 million
Approximately $127.94 million
nationalhighways.co.ukProject metrics
Key dimensions
- Total lengthNational Highways
- 4,023.36 m
Project record