/ Water retailer
Castle Water business water: rates, renewals and bill audits
Castle Water is the largest independent business water retailer in England and Scotland, supplying water and wastewater services to commercial customers. We validate Castle Water water and wastewater bills, recover overcharges and tender your renewal across the market so the price you pay is tested, not assumed.
What Castle Water offers business customers
- Serves hundreds of thousands of UK business premises
- Water, wastewater and trade effluent billing
- SPID-based account records in the open water market
Castle Water water and wastewater charges we most often challenge
Most business water overcharging is not the unit rate — it is what sits around it. On Castle Water accounts these are the recurring findings:
- Surface water and highway drainage charged on non-draining areas
- Meters read as estimates for long periods
- Historic overcharges recoverable across previous billing periods
Renewing a Castle Water contract
Business water can be switched retailer in England. A drainage and meter audit usually recovers more than the switch itself.
We hold your contract end dates, alert you before the termination window closes and tender the requirement so Castle Water has to compete for the renewal. Our service is free of charge to your business and you can cancel at any time.
How the review works
- You sign a Letter of Authority — nothing is undertaken without your written consent.
- You upload a recent Castle Water bill. We read the SPID, consumption, standing charges and contract dates from it.
- We validate every charge against the contract and the published market position.
- Recoverable errors go to Castle Water as a documented dispute; the renewal goes out to tender.
- You receive the evidence pack, the market comparison and our recommendation in writing.
Castle Water water and wastewater: frequently asked questions
- How do I get a cheaper business water price from Castle Water?
- Send us a recent bill and a signed Letter of Authority. We validate the current charges, then tender your business water requirement across the market — including Castle Water — so the renewal offer is tested rather than accepted.
- Can you challenge Castle Water charges I think are wrong?
- Yes. We audit the bill line by line for surface water and highway drainage charged on non-draining areas, meters read as estimates for long periods and other recoverable errors, then raise a documented dispute with Castle Water on your behalf.
- Do I have to leave Castle Water to save money?
- No. Often the best outcome is a corrected, renegotiated contract with Castle Water. We only recommend a switch when the market clearly beats what Castle Water will offer.
- What do you need from me to start?
- A recent water bill, your site address, and a signed Letter of Authority. No work whatsoever is undertaken without your written consent, and you can withdraw it at any time.
- How long does a business water review take?
- A bill validation is normally returned within a few working days. Recovery of a historic overcharge depends on Castle Water's response times, but we chase it and keep you updated in writing throughout.
Check your Castle Water water and wastewater bill
No upfront fee, and a written finding either way. If your charges are correct we will tell you so.
Start my business water review