A difference the built world was not built for — in this house, never a deficit: the ground for building differently, with dignity inherent.
Latin dis- (apart, negation) prefixed to habilis (able, apt, easily handled), from habere (to hold); the compound once named an incapacity before this house made it the word for a difference the built world was not built for.
A difference the world was not built to hold, never a deficit in the person who carries it. Dignity attaches before any accommodation does, not after.