Renovation cost calculator
Enter an approximate year and property type to estimate which renovation items usually appear and their likely cost range. It is designed as a negotiation and screening tool before you ask for contractor quotes.
Adjust age, property type and area
The tool scales area-based items while keeping fixed costs separate. It does not replace a contractor quote or a technical inspection.
Typical issues by age
The figures below are indicative. Real cost depends on actual condition, access, measurements and scope.
- Reparación o sustitución de impermeabilización y tejas frecuente.
- Humedades por filtración, desprendimientos y mejora energética prioritaria.
- Corrosión o carbonatación; parte del parque puede requerir diagnóstico específico.
- Instalaciones antiguas, bajantes y fontanería envejecida.
- Posible amianto en algunos elementos; confirmar, no asumir.
Activated items for this scenario
Each item shows its typical cost. Tick the box on the left to discard the ones that do not apply to your case: the row is struck through and its cost stops counting towards the total, so you can tailor the estimate to your home.
Why a “typical” cost and not a fixed range? The m² are fixed, but the €/m² of each item spans from a light repair to a full intervention. We show the typical scenario (central value) and, per item, how far it can go in severe cases.
Useful for better buying, not for closing a final quote
This calculator is useful for three things: spotting whether an older property needs a serious renovation reserve, opening negotiations with a reasonable figure, and deciding whether it is worth paying for a technical inspection before making an offer.