When calculating your chargeable area we measure the total site area of your premises (whether or not the surface area is permeable) and then exclude any permanently grassed, cultivated or landscaped areas. Examples of excluded areas are playing fields, farmland, racecourses, sports grounds, golf courses, parklands or areas of land on which no building is by law permitted.
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Example of how we calculate your site area measurement
Total site area of the premises: 1351m2
Exclude any permanently grassed, cultivated or landscaped areas: 470m2
Chargeable area: 881m2
This equates to Band 4 (click here to see our bands and charges for 2011-2012) |
Your chargeable area determines how much you pay for your surface water drainage and highway drainage services. Our charge for these services are structured into 15 charging bands (with charging band 1 being the smallest size and therefore the lowest charge).
We use our own digital mapping systems and those of Ordnance Survey to calculate your chargeable area. The charging band that has been allocated to your premises will be shown on your latest wastewater bill.
If you believe that you are being charged on the wrong band you can contact us on 0845 746 2255 to discuss this. You can also view your site area map online to check that we have calculated your chargeable area correctly. You will need your customer account number to access this service - you can find this on a recent bill.
There are a number of ways that you may be able to reduce your surface water and highway drainage charges. Please visit our 'How can I reduce my water and wastewater charges?' section for information.