Hi Richard
Ah, just down the road then (I was born in Durrington).
You could either stress to the client that to give set prices is nigh on impossible as no two properties are the same (as pointed out)
You could also maybe do prices if they insist by say 'from' X amount depending on condition of property, problem here is no two people will agree on what is normal soilage, where as they may think the oven is dirty, you might see it as absolutely minging, and the letting agents loyalty is to the landlord.
Another way through is to say that you can quote per job once you arrive at the property before commencing work, problem here is that sometimes (more often than not) they have to qualify with the landlord of the TDS before work goes ahead.
Not easy, but I would go into the client and talk to them and be professional thoughout.
Regards
Martin
