Then we can design the houses and buildings, considering those technologies as key elements for laying out the distribution of rooms and artifacts in a way that optimizes water and energy use. Here we will make use of water reuse strategies, internal heat storage and transfer to take advantage of hot spots, thermal insulation and many others (see appendix). Of course, buildings and houses must take into account the seasonal variation in sunlight, using its orientation and accessories (like trees for example) to favor direct sunlight in winter and shadows in summer.

After narrowing down the territory and housing dimensions of the city, we move on to design the city itself, meaning what kind of buildings and houses to build and where to place them, zoning for service and commercial areas, different road types, among other dimensions. Besides the traditional urban design principles, in order to have a resilient city, reliable water and energy supply is a must, and for that we have to take into account another level of technologies. Its final form will vary depending on the selection of technologies used for producing water and generating energy, but in any case, we will take advantage of distributed generation and storage for both. Every house and building will have the equipment integrated into its structure (like solar roofs and rainwater collectors) and will be able to connect to a neighborhood network and benefit from community storage and trading. In the case of energy, community microgrids will consider the variability of renewable energy generation and shape the storage and consumption behavior according to the season and short term weather forecast. With respect to water, local storage tanks and pumps will serve as backups in case of emergency. In both, water and energy, the precise definition of nominal capacities and excess storage needed will be the result of detailed engineering calculations for each neighborhood/city/territory. An additional aspect of water is the need to dispose of sewage. In our cities we will have distributed sewage treatment for producing fertilizer, and therefore there will be no underground pipe system to send the waste away.

High speed fiber optic will reach each house, apartment and building. This is crucial in order to take advantage of cheap live voice and video communication in order to minimize unnecessary transport. For example, every person that can telecommute will be able to do so in this city with the highest standards for bandwidth and latency. This will also impact school education (yes, we will have a school), as some instructional lectures for middle and high school students could be done online, while local teachers do in-person tutoring and provide a personalized education for each kid.

We will encourage entrepreneurs to produce food locally, with the help of government subsidies for tech startups and alliances with world leading companies in vertical farming and other related technologies. This will, of course, not be enough to provide all the food for such a city, so we will also design optimal supply chain arrangements with neighboring towns and cities in order to minimize the collective ecological footprint.

Recycling and composting will be required and enforced. Every neighborhood will have stations for both processes, and we will also require (or package less) recyclable packaging materials in all the supply chain arrangements we can.

All houses and buildings will have the same construction and engineering standards, including the technology and equipment related to all the processes mentioned above. The only difference will be the amount of square meters available. Also, there will be no separate zoning for different house sizes. Every neighborhood will have a mix of house types. These principles, coupled with the replicability requirements favor a modular engineering and construction approach.