A few simple features that I didn't see mentioned yet:

* Steel roof - for rain harvesting while retaining potability
* Wood burning stove cookstove and heat stove, with a floor plan / air circulation pattern conducive to wood heating.
* Root cellar and spring house close to the house or in the basement
* Water well drilled from the basement - with adequate ventilation and solar pump
* Outdoor summer kitchen in a screened in porch - for canning without blasting the house with heat in the summer
* South facing roofline pitched for ideal solar panels efficiency (unless snow accumulation dictates a steeper pitch)
* Roof overhangs tuned to the latitude so windows are in shadow during the summer months and in sun during the Winter months.
* Concrete or earthen construction throughout, so that the structure is less susceptible to fire damage.
* Basement is a must
* Water drip-line on the roof ridge line, for summer cooling without power (preferably from a ram pump, given an adequate water supply)
* Tunnel from the basement to a hidden exit as emergency egress and/or flanking position.
* Attic mounted cistern sitting on sturdy steel beams, for both the thermal mass and gravity fed water
* 1" hardened plate steel below each window,
* Sturdy storm/security shutters