Like cus_d said,
extremely broad question. Since this is an arborist/logging forum, I'll assume your are actually doing some building, helpful to add your location.
My own price for installing 1300 sq basement HX floor heat would be about $300 total, mostly for aluminized PEX.
That said, by 'building a home', do you mean you are ACTUALLY going to do the building yourself (cut logs, mill with bandmill, do the carp, elec, plumb work etc YOURSELF) or are you doing the yuppie weenie way and hiring a contractor? Note: I bought a lot of lumber building my own house, but did use 21ea 15 in dia and up DF logs as beams and posts with minimal milling, but did 'weenie out' by buying some finished lumber (G).
99% of folks who say "I'm building a house" means they are hiring folks to do it for them.
If your are actually going to DIY your home, here are some sites you may want to visit. Other wise do what cusd said, and find a pro to separate you from your hard earned $$.
AND, tell the pro to pay attention to insulation FIRST, before even starting the floor heat design process.
http://ecorenovator.org/forum/ This IS the most DIY friendly site I have ever encountered, you may find someone who has done exactly what your are asking. Very helpful folks. Be sure to tell they you are
actually building your house.
http://forums.delphiforums.com/Breaktime_3?dbg=5 Very helpful folks, you can get almost ANY question answered (maybe after some intial ribbing). Tell'em Art sent ya <G>. If you ask such a general question such as
Can anyone give me a quote for Infloor heat in a basement, you will get razzed.
https://law.resource.org/pub/us/code/ You can find all your local codes here
http://forums.finehomebuilding.com/ 10 years ago, this was THE place to go for building advice, has fallen on hard times as most folks have left.
http://hvac-talk.com/vbb/ Not very DIY friendly, but if you know the basics you can get a lot of detailed questions answered.
http://forums.mikeholt.com/forumdisplay.php?f=93&order=desc
Moderators
will DELETE DIY questions, they despise DIY, so look at some of the posts first so you know how to come across as a pro before asking questions, mostly ask for code interpretation vs. 'how to' . A little imagination and you can register as a pro after a few dozen cognizant posts.
And do not forget youtube, you probably can find a video of installing your wood furnance.
