And why do big construction projects so often run late ... a curved wall is almost as easy. So at the DFAB House, a small test building in the suburbs of Zurich, Switzerland, the main wall ...

either a flat fee somewhere around $150,000 or a fee of 15% to 25% of the total cost of construction. So, if you're building a million-dollar house, be prepared to tack on an extra $150,000 to $ ...