1. Describe the work rather than relying on a label
“Small renovation”, “complete refurbishment” and “just changing the layout” do not explain precisely what will happen. Before asking whether you need an architect, list the proposed actions: removing partitions, creating openings, replacing windows, renewing services, working on the roof or changing how a space is used. Add what you intend to keep and which areas have not been inspected. Similar floor areas can involve very different technical questions.
Not every renovation needs an architect. Equally, cost and square meters alone cannot establish the requirements. Include general photographs and a rough sketch clearly labelled as an informal drawing. If a builder has already provided a quotation, attach its itemised scope and exclusions. The person advising you needs to understand the actual changes behind the package name before giving a useful view on your particular case.
2. Identify the property and the information gaps
Gather the full address, cadastral reference, current use and available records. Include earlier plans, permissions or files you hold, approximate building age and any known previous alterations. Explain whether the property is a detached house, an apartment or premises you hope to convert. If documents differ from what exists, flag the discrepancy for investigation. Do not adjust measurements to make the records appear consistent.
Mention any known heritage protection, shared building elements and owners' community decisions. A wall visible only from inside your flat is not automatically yours to alter. Where information is missing, ask which visit, survey or enquiry could resolve it. You are not expected to diagnose the structure yourself. The aim is to let a professional identify the necessary checks before a design or construction price is based on unverified assumptions.
3. Establish the technical scope before choosing a procedure
Spain's LOE building legislation covers certain interventions in existing buildings. Establishing whether your proposal falls within that scope, and which documents and professionals it requires, means examining the actual work. Seek advice from a competent professional when the affected elements or the nature of the changes are uncertain. Avoid starting demolition as a way of finding out what a wall or other element does.
Ask what information is missing, what needs inspection and which decisions depend on the findings. Request a clear distinction between an initial opinion and a conclusion based on completed checks. Photographs can help plan a visit, but do not automatically settle a technical question. If the proposal changes after investigation, revisit the advice. Documentation suitable for one limited intervention may not cover a broader package of work developed later.
4. Check the municipal route for your address
Take a clear description to the town hall responsible for the property, or appoint your adviser to check the procedure as part of their agreed service. Ask what route applies, what documents are required and which conditions must be met before starting. Keep the response, its date and the version of the proposal it considered. A neighbor's experience in another municipality does not establish your own requirements.
Regional rules, planning provisions, protection and the building itself may affect the route. Also distinguish the municipal process from any other permissions or agreements that may be relevant. Mention shared areas, discrepancies in use and previous files or enforcement issues if known. Keep an open-questions list with a responsible person and next action for each item. Submitting a form is not, by itself, evidence that every necessary check has been completed.
5. Define the professional help you are buying
The consultation should lead to an understandable scope: preliminary investigations, technical documentation, a project where required, administrative assistance and construction-stage services. Ask who will carry out each task, what you will receive and what remains outside the appointment. Even when an architect is not mandatory, targeted advice may help coordinate your requirements or assess alternatives. Judge that optional service by the specific decisions it helps you make.
Request proposals against the same work list and ask what happens if hidden conditions emerge or you change the brief. Leave room in the budget for unresolved issues instead of committing every available euro to an untested solution. The purpose is to authorise the next step with sufficient information. A document checklist is only useful when you understand which questions it resolves and which decisions remain open for later investigation.
6. Send a focused enquiry and record the outcome
Prepare a concise initial pack: location, property type, proposed work, photographs, available documents and your main question. Say whether the home will remain occupied and explain your preferred dates, distinguishing a wish from an existing commitment. Avoid committing to a builder's start date before clarifying conditions that could change the scope. After the consultation, write down the agreed next steps and retain the evidence supporting them.
For a wider process overview, read building a house in Spain, while recognising that a renovation requires its own assessment. F5 Arquitectos is based in Ciudad Real. Send your municipality and intended scope to discuss whether an appointment is feasible. The published project catalog introduces the practice's work; it does not establish requirements for another property or imply that services are available everywhere in Spain.
Projects and next steps
Sources and references
Published: October 25, 2026. Requirements and documents must be checked for each property and proposed intervention.