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Costs for small building works rise

Published: 23/02/2021

Prices have risen on average by 4.5% over the past year in the small works sector, although there is variation between trades.

Resource cost increases due to the higher cost of raw materials, and Covid-19 and Brexit related changes to the production process, have resulted in rates rising between 4.19% to 5.52% for contractors working on domestic extensions.  Loft conversions have increased on average by 4.63% over the same period.

All recent changes to wage rates, plant and materials prices and revisions to adjustment factors can be found in the updated 2021 BCIS resource datasets.

The 2021 guide includes new rates for precast concrete manholes in External works section.


The Building Cost Information Service (BCIS) is the leading provider of cost and carbon data to the UK built environment. Over 4,000 subscribing consultants, clients and contractors use BCIS products to control costs, manage budgets, mitigate risk and improve project performance.

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