New doesn’t mean good: the defects we find in brand-new Portuguese builds

There’s a comfortable assumption among buyers that a new build is a safe build. It’s freshly finished, it looks immaculate, surely there’s nothing to check. We see the inside of these properties for a living, and we can tell you plainly: new does not mean good. Some of the most expensive defects we find are in buildings barely a year old, hidden behind crisp render and new paint, and they’re exactly the things a snagging inspection is there to catch before you sign or before the developer’s responsibility runs out.

Here’s what goes wrong, and why it’s so easy to miss.

The shortcuts hide where you can’t see them

When a building is new, the finishes are perfect by definition — and that’s precisely the problem. A fresh coat of paint and a clean tiled floor conceal the parts of the build that were rushed, value-engineered or simply done wrong. The buyer sees the finish. We look at how it was put together underneath, because that’s where the money is lost.

The level threshold that floods

One of the most common modern defects we find is the flush threshold — where the outside ground level is built dead level with the internal floor, so you step straight from terrace to living room with no lip, no step, no upstand. It looks clean and contemporary and buyers love it. The trouble is that done without a proper drainage channel and continuous waterproofing, it’s an open invitation for water to run the wrong way — inwards. Get a heavy Atlantic downpour, the kind Porto and the north get plenty of, and water tracks straight under the door. The detail can be done well, but it demands a high-performance specification that’s routinely absent in Portuguese residential construction. When it’s missing, you find out the first wet winter, and the damage is progressive and rarely covered. (It’s one of the classic ways water gets into a building.)

Membranes, bridges and roofs

The same pattern repeats across the build. Waterproofing membranes that should run continuously get interrupted at the awkward junctions, which are exactly the points where water finds its way in. Thermal bridging — where the insulation is broken by a beam or a slab edge — shows up later as cold spots, condensation and mould in the corners, on a building marketed as energy efficient. Flat roofs and balconies are detailed for looks rather than for shedding water, and the failures take a year or two to surface. Sandwich-panel and lightweight roof systems get specified and installed without the care they need. None of this is visible at a viewing. All of it is expensive once it declares itself.

Why a builder catches what a checklist misses

A snagging list of cosmetic items — a chip here, a door that sticks there — is easy enough for anyone to compile, and it has its place. But the defects that cost real money are the ones built into the structure, and spotting those takes someone who knows how the building was supposed to go together. We read a new build the way we’d build it ourselves: where are the membranes, how does the water get out, where is the insulation broken, what has been hidden because it was quicker to hide it than to do it right. That’s a different level of assessment from a clipboard walk-through, and on a new build it’s the level that matters.

Do it before the clock runs out

There’s a practical reason not to wait. A new build comes with a window in which defects are the developer’s responsibility to put right, and a snagging inspection done early gives you a documented list to hold them to while that window is open. Leave it, and the cost quietly transfers to you. Whether you’re buying off-plan, taking handover, or already in and noticing the first signs of trouble, getting an independent eye over the building turns vague unease into a clear, costed list you can act on.

A shiny new build can hide just as much as a tired old one. We inspect both with our pre-purchase survey, across Porto and northern Portugal, and we tell you what’s really there.

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