I would say the road or yard wouldn't be included - from memory PD rights allow you to build a 'building', if you have 5 hectares or more it's a stand alone building, if under 5 hectares you can only extend an existing building. The concept of putting in two PN's one for a building and one for a track seems ridiculous as one of the requirements is that nothing has been built within 90 metres within 2 years - a track isn't going to be much use if it stops 90m short of the barn... I spoke with a consultant a couple of years ago regarding a possible PN where we had full planning for another building within 90m which we hadn't yet started building - she said unless we declared that we were not going to build the building then the PN wouldn't be valid as within 90m, and we had no intention not to build the new full planning building.
Also when we put in our original planning permission the fee is based on size. And yet we put in for full planning for a 4000sqft barn on a something like a 20,000 sqft yard (16,000sqft when you take into account the 4,000sqft the barn would stand on) and an access road plus changes to the land around as the yard was levelled onto a slope all for the basic planning permission fee so the fee appears to be based on the size of the building.
We happen to have a client whose a planning inspector, though he doesn't specilise in agri appeals here was some useful information he gave us which is as relevant when dealing with the LPA as an appeal:
You will have to deal with "need" in your statement to the Inspector.
The thing to bear in mind is that the Inspector hearing your appeal makes the decision as if the application had been made to him/her in the first place. So although the Council did not mention in its refusal the issue of agricultural need, you will still have to deal with it. But no harm in first pointing out to the Inspector that this is a new issue that the Council did not previously consider to be a problem!
I am not an expert on agricultural need in permitted development cases. But I have looked it up on various planning web sites. Below are two of the most helpful. The first is from a specialist development control practice web site (subscription only, I am afraid):
"Reasonably necessary for agriculture - Lack of need is sometimes cited as an objection to agricultural buildings, but is difficult to sustain if the subject building is stated to be for an agricultural purpose and is clearly designed for such a use. There is no national guidance relating to the assessment of need for agricultural buildings. If, however, it can be shown that an enterprise is of doubtful viability and the results of failure would leave a building in the countryside, which would remain unused or which could realistically be re-utilised for a less suitable purpose, long-term viability may be a matter to be considered."
So this means, that there is a difference between "need" and the much stricter test of whether the agricultural enterprise is "financially viable" based on past accounts (usually over 3 years) and future prospects. But the two can get mixed up.
The second web site you can access yourself and is a lot more helpful:
I think the most relevant bits from this for you are:
"The question as to whether or not a particular building is reasonably necessary for the purposes of agriculture is not one for determination by the LPA; it is purely a matter of fact and degree – either the test is met or it is not. It is an entirely objective test."
and then:
"The need to meet the objective test of reasonable need for the building does not necessarily imply a requirement to prove that the agricultural unit is commercially viable. However, the issue of the viability of the agricultural unit cannot be entirely ignored, because if there is no viable agricultural business being carried on, then there may be some doubt as to whether the site falls within the definition of “agricultural land” at all, as explained above, and it might reasonably be argued that it shows that the building in question is not reasonably necessary for the purposes of agriculture. This is not to say that it is essential to be able to demonstrate the commercial viability of the agricultural enterprise, but if the agricultural enterprise is not (currently) viable, it may in those circumstances be difficult to show on an objective basis that the building is reasonably necessary for the purposes of agriculture within that unit."
From what you told me I don't think the Council is challenging that your business is not financially viable (or is it?). Be prepared to answer that question at the hearing, however - have some copies of relevant figures available just in case. What I understood you to say is that the Council's concerns on need focus on the amount of space that you presently have, and that it is alleged that this existing space is adequate for your present needs (and reasonable future needs?). You will have to fully answer this as we discussed by explaining the space needed for your rare breeds and your plans for the future.