Summary An increasing digital interconnection of commercial and residential buildings is an important element to achieve a more and more energy efficient control by communication and automation. It provides a significant approach to fight climate change and increasing energy prices in a cost-effective manner with low initial investment. Besides potential energy saving for inherent amortization, automation solutions and resulting communication infrastructures allow us to establish innovative digital services and new points of intersection. Another aspect of smart buildings is the matter of fact, that systems are getting more and more complicated, error-prone and challenging during planning, implementation, maintenance and more general the entire management and lifecycle process. During the last years we have developed an automation platform with standard and open-source components including configuration generating processes to efficiently build up infrastructure for a digital heating community in apartment houses. The resulting information and communication infrastructure between smart homes and smart buildings opens up a nearly undiscovered field of interconnection beyond individual internet access of the inhabitants and an important opportunity to provide innovative digital services based on this. Therefore, we are going to provide an additional insight for example into our latest implemented services that go hand in hand like an emergency call service and automatic analysis of heartbeats as well as a rental system for micro mobiles.