Historical District Valuations

[John Moore]

Ive got a couple of properties that we are fixing up right now and they create a bit of a challenge in the valuation process. One of them sits directly between two historical districts but the house itself is not in a historical district. The second property is located in the historical district proper. They are literally about 200 yards from each other just two blocks over. Homes in the District sell for more, there is no doubt. But the question is ....EXACTLY how much more? for the sake of this question lets say that both houses are identical. How much more would you value the one in the historical district? 15% more? 30% more? is there any precedent on this?