1. Identify rights over the surfaces
Gather the founding documents, plans, rules and previous decisions. Distinguish shared property, exclusive property and exclusive-use rights. Access to a balcony from your apartment does not establish exclusive ownership of its exterior or the facade. Check mounting, appearance, connection and required approvals before buying.
2. Have the work and voting rules assessed
The Civil Code and case law distinguish necessary, useful and luxury works. Classification depends on the actual project, and the condominium’s rules require examination. Establish the owner and ownership-share majorities, affected rights and cost allocation. Article 647d does not give every owner unilateral permission to cover a shared roof.
3. Present a complete proposal
Request a proposal covering roof condition, monthly generation, installed price, confirmed grants, connection, insurance and maintenance. Identify participants, electricity sharing, billing and responsibilities after a sale or fault. Consider a smaller or later project where it addresses objections. Panel area alone cannot establish identical savings for each owner.
4. Follow the meeting procedure
Send the administrator a written request with the proposal and documents. Check notice, agenda, deadlines, quorum, representation and the proposed resolution. Keep minutes and detailed voting results. If the request is not considered or the vote is disputed, promptly have your rights and deadlines assessed; a quick or inexpensive procedure is not guaranteed.
5. Distinguish reform proposals from applicable law
In May 2026, the Federal Office of Justice published the message and draft modernising condominium law. A legislative proposal is not itself an enacted rule. Check the law applicable on the voting date. You can also request legal-advice or mediation quotes defining scope and fees, without assuming the process will change the outcome.