When someone as far south as USDA zone 7 wants a greenhouse, preparing for excess heat is at least as important as catching and storing heat.  The 1/4 acre lot in question has been dominated by large shade trees for more than 30 years, so that garden cultivation was limited to the far east side of the property.  In the past few years most of the trees have come down, opening up the site for more cultivation and a potential greenhouse.

The client asked where and how to expand the garden; our recommendation is to rest the existing 35-year garden with nitrogen fixing cover crops and perennials, bringing annual crop production closer to the house, being mindful of traffic patterns to and from the back door of the house.  The first of the two attached images shows the traffic patterns and proposed garden areas.

As for where to put a greenhouse, our recommendation is against the south-facing wall of the eastern part of the house, where it will be shaded from the west during the hot summer afternoons.  Water catchment can be placed against the brick wall of the house for additional thermal mass in winter.

The placement of the greenhouse door is awkward, since if it is on the more convenient east side it takes away from the best growing space in the greenhouse.  We therefore recommend placing the door in the west wall, even though it is less convenient, to maximize growing space.  Of course if the glazing is plastic, it can be removed from both ends during the summer for increased access as well as ventilation.