Quantity surveyor?

[Chocolate1984]

Is it a good idea to use a Quantity surveyor before submitting extension plans? A friend suggested we get one but I’m not sure. Is it useful? Or is it better to put the plans in, get builders to quote and decide from there?

Our builder used a quantity surveyor to come up with his quote. This gave us the entire breakdown of costs, down to a single nail. Other quotes we had were literally a total figure on the back of a fag packet...needless to say, we didn't go with these builders as we have a tight budget & we need to stick to it!