It’s the first question nearly every buyer asks us, and it’s the one with the least honest answer floating around online. Type “renovation cost Portugal” into Google and you’ll find a pile of figures pulled out of thin air by people who have never lifted a trowel. We price this work for a living, across Porto and the north, so here’s a straight account of what renovation and building work really costs in Portugal in 2026 — and, just as importantly, why no one can give you a firm number without standing inside the building first.
Costs are usually talked about per square metre of floor area, and they fall into broad bands depending on how deep the work goes. These are indicative figures for the works themselves, before IVA, professional fees and contingency, and they assume proper trades and a job done to last rather than dressed up to sell.
A light cosmetic refresh — new finishes, a kitchen and bathroom swap, paint and flooring, nothing structural — generally runs somewhere around €400 to €700 per square metre. A full standard renovation, where you’re rewiring, replumbing, replacing kitchens and bathrooms, replastering and shifting the odd wall, lands closer to €700 to €1,100 per square metre. A full gut or ruin conversion, where you’re dealing with the structure, the roof and every service from scratch, sits at €1,100 to €1,600 per square metre and can climb past that the moment underpinning or rebuilt walls enter the picture. A new build, whether traditional masonry or timber frame, tends to settle around €1,100 to €1,400 per square metre for the hard costs on a clean, accessible site.
Those are the bands. They’re useful for sketching out whether a project is even worth pursuing. They are not a quote, and anyone who hands you one off a listing photo is guessing.
The gap between the bottom and the top of each band isn’t padding. It’s the difference between a building that cooperates and one that fights you the whole way.
The condition and structure of the property is the biggest single factor. A sound shell that just needs modernising is a different animal from a damp-ridden granite ruin with a failing roof and no foundations to speak of. Access matters more than people expect — a townhouse on a narrow Porto street with no parking and everything carried up by hand costs more to run than a house you can back a truck up to. The level of finish you’re after moves the figure enormously, because the difference between builder-standard and architect-specified fittings can double a bathroom on its own. The state of the existing services — wiring, plumbing, drainage — decides whether you’re patching or starting again. And then there’s what we uncover once the work begins, which on an older Portuguese property is almost never nothing — the problems we find again and again have a habit of living exactly where you can’t see them at a viewing.
This is the honest reason a real number is hard to give in the abstract. We need to see the property, or have detailed information in front of us, before we can price it properly. Everything before that is a ballpark, and we’ll always tell you when we’re giving you one.
One thing that catches foreign buyers out. Qualifying renovation works on residential property in Portugal can attract a reduced IVA rate of 6 per cent rather than the standard 23 per cent, under specific conditions. It’s not automatic and it doesn’t apply to everything, but on a sizeable renovation it’s a meaningful saving, and it’s worth structuring the work with it in mind from the start. A builder who knows how it applies will save you more than the difference in their fee.
The cost of the work is half the decision. The other half is knowing what work the building actually needs — which is exactly what a proper pre-purchase survey tells you, and what a listing never will. Get the condition assessed before you commit, get realistic costs attached to every finding, and you walk into the purchase knowing whether the number on the table is fair, negotiable, or a reason to walk away.
If you’ve found a property and want to know what it’ll really cost to put right, that’s the work we do — from the survey through to the renovation itself. We’ll tell you straight.
If you’ve found a property, or you’re fighting damp that keeps coming back, talk to us before you commit to anything. WhatsApp is the fastest way to reach us — we respond the same day, in plain English.
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