Randy:
Lack of sales within a local market does not mean lack of market. It may simply mean lack of product for sale. That is unless the market is made up of such properties (Beverly Hills, Palm Beach, etc,). Most homes said size are sold nationally or at minimum regionally. Just finished a 15,000/sf in Green Bay. Used 9 sales throughout Midwest. All above 10,000/sf; however, none above 16,000/sf. Spoke with all of the brokers. Only one was purchased by a local buyers. I have cost, plus land value, of an +/-11,000/sf built 2 years ago. This home sold at a profit relative to cost to build. I found no proof of obsolescence in this size range.
RStrahan:
But 35k is a monster. The air is really thin up there. None the less, if you have no evidence of obsolescence, do not assume it exist. I have actual cost for my 15,000/sf and cost of some other similar sized homes. If you would like I can ask the client if I can provide them to help you. Your also welcome to the sales, photographs are included. They paid me to travel the Midwest to look at these things. If you are not charging +$5,000.00 you need to turn the job back as a loss. To reasonably understand buyers and sellers you need to talk to everyone involved. It is a whole different world up there. Furthermore, you can look at the string I posted in Spring or early Summer asking for information. It is in the General Forum. There is a lot of helpful information on the string with some good websites. It is worth your time to look up.
Steve Vertin