Westminster City Council King Street Low Carbon Trial - Client Report

CARBON SAVING VS COST INCREASE Overall, we can see that 27t of carbon was saved on the scheme at a cost of £94,000. This roughly equates to 0.29t for every £1,000 spent. Again, if we only use the works cost of £49,000 it works out as 0.55t per £1,000. However, if we consider the cost of the scheme with no carbon savings, we can see that the extra money spent is where the carbon savings have come from. The table below shows what carbon savings you make for the extra money spent on the low carbon measures.

Extra Spend for Low Carbon Option

Carbon Saved per £1,000 (t)

Carbon Saved per £1,000 (%)

Total Cost

£53,000

0.5t

1.1%

Total Cost Excluding Extraordinary Items

£8,000

3.3t

7.3%

The total works budget for the 2021-22 PPM footway budget is circa £1.5m. To undertake all of these schemes under the low carbon model, with power readily available on site, it would cost approximately 20% more, bringing it to £1.8m. If all the schemes were of a similar size to King Street it would result in 30 schemes, and if they made the same carbon savings, it would equate to circa 810t carbon savings over the year.

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