Thankyou for taking the time to post such comprehensive replies - there's no substitute for someone who deals with these issues on a regular basis.
I also agree that a clearer separation of valuation & survey would be helpful (to both buyers and surveyors).
One question for you though...you mentioned
I agree this would make sense if I had asked a surveyor to look at every aspect of a property. But firstly, most surveyors will exclude certain items as standard (electrics, plumbing, anything under carpets etc. etc.) and most buyers going to the trouble of a full survey are (if they have some experience) likely to direct the surveyor towards certain points and away from others.
So, my point is....if the surveyor has already excluded electrics, plumbing, damp, infestation and anything hidden by carpets or furniture - I wouldn't expect him to use the total property value as a guide (since he isn't giving me an opinion on total value). ie. If the house costs £500k and he has excluded all of the above...he has already excluded perhaps £100k of repairs.
Secondly, if I ask for an opinion specifically on the roof and nothing else....if repairs are missed....it's a 5% margin of error on the roof (not on the whole property) which is relevant.
I agree that buyers who want to spend only a couple of hundred pounds and get total comfort on their purchase are being unrealistic in the extreme. But if I spend a couple of thousand, solely on assessing the roof...I'd expect it to be pretty damn accurate.
I also agree that a clearer separation of valuation & survey would be helpful (to both buyers and surveyors).
One question for you though...you mentioned
If there is a general acceptance by the Courts that property valuation carries with it a margin of error of about 5% then it follows that diminution equating to less than 5% of the property value is likely to be considered within the margin of error and not awarded
I agree this would make sense if I had asked a surveyor to look at every aspect of a property. But firstly, most surveyors will exclude certain items as standard (electrics, plumbing, anything under carpets etc. etc.) and most buyers going to the trouble of a full survey are (if they have some experience) likely to direct the surveyor towards certain points and away from others.
So, my point is....if the surveyor has already excluded electrics, plumbing, damp, infestation and anything hidden by carpets or furniture - I wouldn't expect him to use the total property value as a guide (since he isn't giving me an opinion on total value). ie. If the house costs £500k and he has excluded all of the above...he has already excluded perhaps £100k of repairs.
Secondly, if I ask for an opinion specifically on the roof and nothing else....if repairs are missed....it's a 5% margin of error on the roof (not on the whole property) which is relevant.
I agree that buyers who want to spend only a couple of hundred pounds and get total comfort on their purchase are being unrealistic in the extreme. But if I spend a couple of thousand, solely on assessing the roof...I'd expect it to be pretty damn accurate.