Chicago’s legendary rock music hall Double Door is overcoming the typical odds faced by those looking to preserve the best of a historic building while revamping it with both modern and green features. To paraphrase George Harrison, it takes plenty of money, a whole lot of precious time, and much patience, to do it right. Rendering of Double Door facade by Barker Nestor. In 2017, when they realized they had to move out of their old space on the north side of the city, the