External expert for vacancy mapping and housing reuse analysis in Athens
INZEB invites interested organisations and individual experts to submit proposals for consultancy services under the EUKI-funded project Transforming Invisible Buildings.
The assignment involves developing and applying a locally adapted methodology to identify, classify, and assess vacant and underutilised properties in the City of Athens, focusing on central Athens and prioritising publicly owned buildings
| Call at a glance | Details |
| Maximum contract value | EUR 15,000, including VAT |
| Implementation period | 1 September 2026 to February 2027 |
| Submission deadline | 31 August 2026 |
| Applications and questions | Alice Corovessi, Managing Director, INZEB ac@inzeb.org |
About Transforming Invisible Buildings
Transforming Invisible Buildings addresses the reactivation of vacant and underutilised buildings in Athens, Ljubljana and Zagreb, linking reuse of the existing building stock with energy efficiency and municipal planning. Energy Cities coordinates the project, with INZEB responsible for local implementation in Athens. Habitat for Humanity International (HFHI) provides the common vacancy-mapping framework and technical guidance.
The Athens assignment will develop evidence to support assessment of housing reuse opportunities, future municipal action and policy development. It will focus on Psirri, Omonoia, Kerameikos and Kolonos, with the precise study boundary to be confirmed by INZEB. Relevant properties include former commercial or office buildings, mixed-use buildings, municipal buildings and residential stock, including buildings with potential for several housing units.
Scope of the assignment
The selected consultant will adapt and apply the project’s common mapping framework to the Athens context, assess relevant data sources and access conditions, compile a GDPR-compliant geo-referenced database, and carry out spatial analysis of the pilot area.
The work will also include classifying candidate properties by vacancy confidence and housing activation potential, prioritising and preliminarily assessing selected cases, and recommending further development of the methodology and future policy and implementation measures.
Expected deliverables
The assignment comprises three deliverable packages:
| Stage | Deliverable |
| 1 | Property Database & Methodology Report |
| 2 | Feasibility Report & Priority Property List |
| 3 | Final Report |
The analysis will address the Greek data, ownership, planning and regulatory context. Public ownership will not be treated as proof that a building is immediately available for conversion. The consultant will document uncertainty, legal access conditions and practical limitations, and undertake targeted field verification where feasible.
The Terms of Reference provide a detailed description of the assignment, coordination requirements, and selection criteria:
Required expertise
Applicants should demonstrate relevant experience in GIS and spatial analysis, cadastral and property information, urban and spatial planning, data analysis and integration, housing analysis, or development of analytical methodologies and applied research.
Experience with vacancy mapping, adaptive reuse, publicly owned property, Greek planning requirements, ELSTAT, Hellenic Cadastre or municipal datasets will be relevant. Comparable assignments in other contexts may also demonstrate the required capability.
Submission of proposals
The application shall include administrative information and CVs, a technical proposal describing the methodology, tools, team, risks and indicative work plan, and a financial proposal with a cost breakdown and VAT treatment. Individual consultants shall include a cover letter and CV. Applicants must demonstrate capacity to deliver all required outputs within the agreed timetable and the maximum contract value.
Submit proposals to Alice Corovessi, Managing Director, INZEB, at ac@inzeb.org, by 31 August 2026.
Suggested subject: Invisible Buildings | Athens pilot | External expert proposal
Please direct questions about the assignment and submission process to ac@inzeb.org.
Funding acknowledgement
This project is part of the European Climate Initiative (EUKI). EUKI is a project financing instrument by the German Federal Ministry for the Environment, Climate Action, Nature Conservation and Nuclear Safety (BMUKN). The EUKI call for project ideas is implemented by the Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH. EUKI’s overarching goal is to foster climate cooperation within the European Union (EU) to mitigate greenhouse gas emissions.
