This is a case of professional negligence, so you first of all need to send the lawyers a letter of claim.
The amount to claim would be the diminution in the property value given the existence of the waste site. You would need a valuation from the estate agency and to ask them what the reduction in price it - you then have a sum to claim.
I have uploaded a template letter which you can use to tailor to your situation.
You need to give them 14 days to acknowledge the letter and once they do, they have up to 3 months to confirm their liability decision. If they deny liability (which is unlikely in your case as the error is clear and obvious) then you can commence county court proceedings using the form N1 (copy attached) and post 3 copies with the court fee to :
- County Court Business Centre, PO Box 527, Salford, M5 0BY.
The court fee is depends on the sum claimed and details can be found at page 5 here:
If you prefer a law firm to handle the case you can use a no win no fee firm and that may be wise if the claim is likely to be substantial.
I can recommend either http://www.slatergordon.co.uk or http://www.irwinmitchell.com
I hope this helps - if you can please accept the answer and give me a 5 star rating (the top right of your screen & then click “submit”), I can answer follow up Q&A's at no extra charge and I will be credited for helping you today.