| Federal property for sale (BImA) Bundesanstalt für Immobilienaufgaben (BImA) Live sales of federal buildings and land (the open API behind the BImA property search; rentals, garages and parking left out). A disposal is an open route in; it does not say the building stands empty. | Open API | 0 | Live 2026-10-09 | No licence stated — public sale offers, credited to the BImA |
| Current vacancies (city GeoServer) Landeshauptstadt München, Referat für Arbeit und Wirtschaft | Open API | 15 | Live 2026-10-09 | Datenlizenz Deutschland – Namensnennung 2.0 |
| Office and commercial space on offer (city economic department) Landeshauptstadt München, Referat für Arbeit und Wirtschaft Mostly leases in projects — a forward sign of oversupply, not a list of empty buildings. | Open API | 97 | Live 2026-10-09 | Datenlizenz Deutschland – Namensnennung 2.0 |
| Forced auctions of commercial property (zvg-portal) Justizportal des Bundes und der Länder Non-residential objects only; shown until the hearing date. Hamburg courts do not publish here. | Open API | 3 | Live 2026-10-09 | Official public notice (§ 39 ZVG) |
| OpenStreetMap disused/abandoned tags and brownfields OpenStreetMap contributors | Open API | 267 | Live 2026-10-09 | ODbL 1.0 (© OpenStreetMap contributors) |
| Rail, S-Bahn and U-Bahn stations (OpenStreetMap) OpenStreetMap contributors | Open API | scoring | Live 2026-10-09 | ODbL 1.0 (© OpenStreetMap contributors) |
| Building heights: GlobalBuildingAtlas (TU Munich) Zhu, X. X., Chen, S., Zhang, F., Shi, Y., Wang, Y. (2025), Technical University of Munich GlobalBuildingAtlas: an open global and complete dataset of building polygons, heights and LoD1 3D models. Earth System Science Data 17(12), 6647–6668, doi:10.5194/essd-17-6647-2025. Read from the Parquet copy on Source Cooperative. Satellite-derived heights (typically 1.5–3 m error in Europe), turned into storeys with storey heights fitted on Berlin; used only where no register or official 3D model sizes the building. | Open download | 16 buildings sized | Live 2026-10-09 | CC BY-NC 4.0 (heights); footprints from OpenStreetMap and Microsoft: ODbL |
| Storeys and heights: 3D building models LoD2 (Bavaria) Bayerische Vermessungsverwaltung Datenquelle: Bayerische Vermessungsverwaltung – www.geodaten.bayern.de. Recorded storeys where the model carries them, else the eaves height above ground (lowest eaves − ground). | Open download | 297 buildings sized | Live 2026-10-09 | CC BY 4.0 |
| Road noise (EU Environmental Noise Directive, Lden) European Environment Agency | Open API | scoring | Live 2026-10-09 | EEA standard re-use policy (attribution) |
| Leerstandsmelder.de — public reports of empty buildings Leerstandsmelder (Gängeviertel e.V., Hamburg) Shown while we ask Leerstandsmelder for permission. Reports since 2016 only, with the address, the month reported and a link to each entry; not checked by EHC. Each point says when a report has since been marked demolished, lived in, in interim use or rebuilt on Leerstandsmelder, and the owner type the reporter gave (private owners are never named). | Asking for permission | 133 | Live 2026-10-09 | Credited to Leerstandsmelder.de; asking for permission |
| Open-ended property funds: buildings they report partly empty Open-ended real-estate funds (each point names its fund and report) German and Austrian open-ended public property funds must list every property with its vacancy (or letting) rate in their annual and half-year reports. scripts/reuse/import-fund-reports.ts reads those lists; properties at 10 % vacancy or more are shown, those at 25 % or more count as evidence. | Open download | 17 | Live 2026-10-09 | Published fund report (KAGB / KARBV property list), cited per point |
| Co-working spaces, department stores, banks, hotels and cinemas listed as permanently closed Overture Maps Foundation (closure data: BrightQuery company records) Places with operating_status "permanently_closed" in the monthly Overture release, read by scripts/reuse/import-overture-closures.ts and matched to the building they sit in. A closed business is usually one unit; names are shown only for companies, never for sole traders. | Open download | 120 | Live 2026-10-09 | CDLA Permissive 2.0 (Overture Maps Foundation) |
| Land without current use and stalled construction, mapped from satellite imagery (Copernicus Urban Atlas 2006–2018) European Environment Agency — Copernicus Land Monitoring Service Urban Atlas class 13400 (brownfields, demolition sites and gaps in the built-up area, 0.25 ha and up) compared across the 2006, 2012 and 2018 editions, so each plot says how long it has stood unused; plus construction sites (13300) already under way in 2012, and 2012 construction sites left unused by 2018. Read from the EEA's open ArcGIS services, the same way in every radar city. The 2021 edition (Copernicus Data Space) drops plots built on since 2018 where scripts/reuse/import-urban-atlas-2021.ts has been run. Points are context, never evidence of vacancy. | Open API | 143 | Live 2026-10-09 | Copernicus open data (© European Union, Copernicus Land Monitoring Service 2006–2021, EEA) |
| Property companies in insolvency, at the property their purpose names Insolvency courts (Insolvenzbekanntmachungen), structured by OpenRegister Companies in preliminary or opened insolvency proceedings whose registered business purpose speaks of land or buildings (scripts/reuse/import-insolvencies.ts, OpenRegister API — the portal itself disallows automated access, so it is never fetched). A company is placed at the street its purpose names; the rest are leads in the admin. An insolvent owner signals a possible sale, not vacancy: weak evidence. | Open API | 1 | Live 2026-10-09 | Official notices (§ 5 UrhG, source credited), via the OpenRegister API |
| Stalled construction and buildings held by insolvent developers EHC research (dated press and court sources per point) Signa, Adler/Consus and other developer insolvencies since 2022 and stalled sites, each with its latest dated status (src/scripts/data/reuse/stalled-projects.json; news leads from scripts/reuse/mine-news.ts are reviewed before they join). | EHC research | 0 | Live 2026-10-09 | Cited publisher per point |
| Church buildings the dioceses and regional churches plan to give up Catholic dioceses and Protestant regional churches (their building plans), via EHC research Buildings a church body’s published building plan or recent reporting names as to be given up, without church funding, for sale or lease, or profaned (src/scripts/data/reuse/church-plans.json and brussels-churches.json). | EHC research | 5 | Live 2026-10-09 | Cited publisher per point |
| Named buildings and sites from EHC research (each with its own source) European Housing Coop research Includes the library’s public lighthouse conversions (src/scripts/data/reuse/lighthouses.json), shown under "Already converting" with a link to their library page. | EHC research | 29 | Live 2026-10-09 | Facts cited to their publishers |
| Commercial listings (ImmoScout24 / immowelt) Scout24 / AVIV Blocked to automated access; we do not work around that. Request drafted in docs/reuse-radar/outreach/. | Asking for permission | 0 | Pending | Proprietary — API or data partnership requested |
| Year built and listing: OpenStreetMap building tags OpenStreetMap contributors start_date / construction_date and heritage / listed_status of the OpenStreetMap outline a record is matched to, where no register answers. Read with the outline match, not a separate query. | Open API | scoring | Live 2026-10-09 | ODbL 1.0 (© OpenStreetMap contributors) |
| Empty properties of the Free State of Bavaria (Landtag answer, Apr 2024) Bayerischer Landtag — answer of the Staatsministerium für Wohnen, Bau und Verkehr (Drs. 19/1448) | Open download | 27 | Live 2026-10-09 | Official document (§ 5 UrhG, no copyright); credit "Bayerischer Landtag, Drs. 19/1448". Located with OpenStreetMap (Photon/Nominatim, ODbL). |
| Homes and mixed buildings named empty in Munich council papers (Stadtrat, since 2014) Landeshauptstadt München — council papers via München Transparent (OParl mirror of the RIS) | Open API | 24 | Live 2026-10-09 | Official documents (§ 5 UrhG, no copyright); credit "Landeshauptstadt München, <paper reference>"; mirror by München Transparent. No open-data licence stated. Located with OpenStreetMap (Photon/Nominatim, ODbL). |
| Public buildings named empty in Munich council papers (Stadtrat, since 2014) Landeshauptstadt München — council papers via München Transparent (OParl mirror of the RIS) | Open API | 2 | Live 2026-10-09 | Official documents (§ 5 UrhG, no copyright); credit "Landeshauptstadt München, <paper reference>"; mirror by München Transparent. No open-data licence stated. Located with OpenStreetMap (Photon/Nominatim, ODbL). |
| Homes councillors name empty in questions the city has not (yet) answered in the council system (since 2014) Landeshauptstadt München — council papers via München Transparent (OParl mirror of the RIS) | Open API | 19 | Live 2026-10-09 | Official documents (§ 5 UrhG, no copyright); credit "Landeshauptstadt München, <paper reference>"; mirror by München Transparent. No open-data licence stated. Located with OpenStreetMap (Photon/Nominatim, ODbL). |
| Unused city commercial space (Kommunalreferat report, 30 Jun 2024) Landeshauptstadt München, Kommunalreferat (Immobilienmanagement) — report to the Kommunalausschuss, Sitzungsvorlage 20-26 / V 14939, annex "Übersicht der verfügbaren gewerblichen Flächen" | Open download | 13 | Live 2026-10-09 | Official document (§ 5 UrhG, no copyright); credit "Landeshauptstadt München, Kommunalreferat"; mirror by München Transparent. Located with OpenStreetMap (Photon, ODbL). |
| Buildings named in the news (each with its article) Local and national press, read by EHC Buildings the news reports empty, for sale or to let, to be demolished or being converted (src/scripts/data/reuse/news-building-leads.json; rules in src/lib/reuse/news-layer.ts). A report that names a building already on the map is shown on its card instead of a second point; one an open source contradicted, or that says the building is in use, is left out. Not checked on site. | EHC research | 26 | Live 2026-10-14 | Facts with a link to the article; the one-line summary is ours — no article text is republished |
| Era of the buildings around it: Zensus 2022 (100 m grid) Statistisches Bundesamt (Destatis), Zensus 2022 Buildings with living space by decade of construction in the record’s 100 m grid cell — not the building itself, which may well be an office. An era is given only when at least 60% of the cell’s buildings fall within 30 years; counts are perturbed for confidentiality (Cell-Key Method). | Open download | scoring | Live 2026-10-14 | Datenlizenz Deutschland – Namensnennung 2.0 |
| Era of the buildings around it: Zensus 2022 (3 × 3 grid cells) Statistisches Bundesamt (Destatis), Zensus 2022 As the 100 m figure, over the nine cells around the record, where its own cell counts fewer than five buildings with homes. | Open download | scoring | Live 2026-10-14 | Datenlizenz Deutschland – Namensnennung 2.0 |
| Probable era: estimated from a street photo (Panoramax, Mapillary, Google Street View) Panoramax and Mapillary contributors; Google Street View (research use agreed with Google, 14 Oct 2026); estimate by EHC with a vision model Where no register dates a building: its era read from a Panoramax or Mapillary photo looking at it — Google Street View only where no open photo answers (scripts/reuse/estimate-photo-eras.ts), only when the building is clearly visible and the model is confident, and only as “before 1945” or “1945 or later” — the split it got right for 89% of buildings with a register year in Amsterdam and Paris, and 89% from Street View pictures alone (photo-eras/calibration.json). An estimate: a sentence in the conversion check, never points. | Open API | scoring | Live 2026-10-14 | Open photos CC BY-SA 4.0 or Licence Ouverte 2.0 (per picture); Street View read for research only, never stored or shown; only the estimated era is published, never a photo |
