A clear, Spain-specific breakdown of what new windows actually cost per square metre in 2026, fully installed — PVC, aluminium and wood compared. See worked examples for a typical flat and a villa, learn exactly what pushes the price up or down, and find out why the cheapest quote is rarely the best.
Three window quotes that look comparable can describe three completely different jobs. This guide shows you exactly how to read a Spanish presupuesto, which line items must appear, how to compare apples to apples on glazing, Uw and installation, and the red flags hiding in suspiciously cheap quotes.
Windows are where most homes leak heat in winter and gain it in summer — and in Spain, where air-conditioning runs hard from June to September, that shows up directly on your electricity bill. This guide explains Uw and g-value, compares single, double and triple glazing, gives realistic post-replacement savings and payback figures, and shows how grants can cut the upfront cost.
In 2026 you can stack two distinct savings on new windows in Spain: a NextGenerationEU direct grant of up to 40% (around €3,000) and an IRPF tax deduction of up to 60%. This guide explains both, the exact requirements, the paperwork in order, the deadlines, and the mistakes that get claims rejected.
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