What the visado is and what it checks
The visado colegial (professional body validation) is the control function the professional college exercises over its members' work, regulated in article 13 of the Professional Colleges Act. Its content is legally defined: the college checks the identity and professional qualification of the work's author, and the formal correctness and completeness of the documentation under the applicable rules.
Equally important is what the law expressly excludes: the visado does not cover fees or other contractual conditions, and does not validate the technical content of the work in the sense of guaranteeing its soundness. The college answers for what it validates within the terms of its function; the technical responsibility for the design remains the designer's, as befits the LOE's distribution presented in the article on the building agents.
The general rule: voluntariness since 2009
The reform of the Professional Colleges Act by Ley 25/2009, within the transposition of the services directive, inverted the historical system: the visado ceased to be generally required and became something obtained at the client's request, with the Government reserved the power to fix by regulation the obligatory cases for justified safety reasons. The obligatory cases were then fixed in Royal Decree 1000/2010.
The exercise of that power is Royal Decree 1000/2010, which establishes on an exclusive and excluding basis the list of works subject to obligatory validation. Exclusive and excluding means the list is closed: neither the colleges nor the administrations can add cases, and the central State administration does not even request it when acting as a client.
The obligatory cases of RD 1000/2010
For the ordinary building process, the relevant cases on the article 2 list are two: the proyecto de ejecución (detailed design) of building works, building as defined by the LOE, and the certificado final de obra (final works certificate). To these are added their parallels in legalisations, the legalisation design and its certificate, and cases outside ordinary building, notably demolition designs using explosives and certain works from other regulatory fields.
The logic of the reduction is the one the royal decree itself declares: the visado is kept only where a direct relationship exists between the professional work and people's safety and physical integrity, and where the visado is the most proportionate control instrument. In the design's documentary flow, the practical consequence is sharp: the proyecto básico is processed without obligatory validation, and the detailed design and the final certificate always carry it.
| Aspect | What the visado checks | What it does not check |
|---|---|---|
| Technician's identity and standing | Qualification, registration and absence of disqualification | The technical quality of the solution |
| Documentary integrity | That the document is complete for its type | The structural or energy calculations |
| Formal correctness | Structure and formal content of the document | The quantities and the budget |
| Registration | Professional body record of the work | Planning conformity, which belongs to the licence |
The voluntary visado: what value it retains
Outside the list, the visado survives as a service at the client's request, and its real use varies by territory and type of operation. What it contributes is institutional traceability: a certain date for the document, accreditation of the signatory's qualification, college registration of the work and, where applicable, the cover of the college's liability regime for its control function. Institutional developers, insurers and some financiers value it as a piece of their own documentary diligence, and certain administrations appreciate it in practice even though they cannot demand it.
The healthy professional decision is to treat it as what it is: a documentary management and trust instrument, with a fee set by each college, whose usefulness depends on the operation, not a ritual toll nor a technical guarantee the law does not attribute to it. It is worth deciding operation by operation rather than by habit.
Frequent errors
The first is confusing the visado with technical approval and relaxing the design's quality control because it is validated: the college reviewed neither the calculations nor the quantities. Design quality control remains the designer's responsibility.
The second is forgetting the final works certificate's validation at closure, discovering its absence when the first occupation procedure demands it. The certificate is validated before first occupation is applied for.
The third is accepting visado demands outside the legal list as if they were obligatory, assuming costs and delays the rules do not impose. The list is checked in Royal Decree 1000/2010.
The fourth is the reverse: systematically dispensing with the voluntary visado in operations where financier or insurer expected it, and paying for it later in documentary friction. It is worth asking the financier and the insurer what they expect.
Note: the regime cited is that of Ley 2/1974 as reformed by Ley 25/2009 and Royal Decree 1000/2010; validation procedures and fees are specific to each professional college.