what is dach-managed-units fr?

This repository is not software. It is a written research document that estimates how many homes in Germany, Austria, and Switzerland, together known as the DACH region, are professionally managed rather than run directly by their private owner. Professionally managed means the property is handled by a management company, housing cooperative, or similar organization, instead of an individual landlord looking after just a few units themselves. The author built the estimate from the ground up using public government statistics, such as the German 2022 census, Austrian housing statistics, and Swiss federal statistics, rather than repeating a commonly cited figure that the author found was not properly sourced. Every number in the document links back to its original source, and every assumption used to fill gaps in the data is stated openly rather than hidden inside the final total. The headline finding is that around 15 million homes across the three countries are professionally managed, with a defensible range of about 11 to 19 million depending on which assumptions are used, sitting on a firm floor of about 11.4 million that needs no assumptions at all. This is notably lower than the roughly 20 million figure often repeated in the industry. The document breaks the estimate down country by country, shows low, central, and high cases, and includes a separate, less certain estimate for commercial properties on top of the residential figure. This project is meant to be read, cited, and challenged rather than run or installed. The author explicitly invites corrections and better sources through GitHub issues, and the whole document is released under the Creative Commons Attribution 4.0 license, meaning anyone can reuse, fork, or build on it as long as they give credit.