Buying or owning in Barcelona, without surprises
Independent surveys and structural testing from a local chartered technical architect firm: aluminosis (high-alumina cement) tests, pre-purchase surveys, expert reports and works supervision. 1,000+ lab tests on record.
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Straight answers about buildings
Most of our international clients need one of these two. Both come with a signed report by a licensed technical architect (colegiado nº 10385, CAATEEB).
Lab testing for high-alumina cement in concrete beams — Barcelona's hidden defect in 1950–1975 buildings. From €245 + VAT, report in 7 days.
View service →A surveyor checks the flat and the building before you sign anything. Clear report, repair estimates, negotiation leverage.
View service →If you own, buy or open something here
The paperwork a foreign owner actually runs into in Barcelona, explained in English — with the Spanish and Catalan names you will be asked for at the counter.
You bought a flat and want to gut it. Which permit you need, what a wall can and cannot do, and who signs.
View service →Opening a bar, a shop or an office. Which of the three regimes applies to you, and what it costs to get it wrong.
View service →Bad workmanship, leaks from upstairs, defects the seller never mentioned. The report a Spanish court accepts as evidence.
View service →The certificat de solidesa the council, the solar installer or the licensing office asks you for.
View service →The compulsory inspection of buildings over 45 years old. Your comunidad orders it — here is what it means for you.
View service →Local data, licensed engineers, plain answers
We are SLZ, Ingeniería y Arquitectura (brand: SINLUZ), a Barcelona building-surveying and engineering practice working since 2004: 12,000+ case files opened, 3,000+ commissions completed, and the longest private series of aluminosis lab tests we know of in the city — 1,000 and counting.
We work with fixed prices and written deadlines. WhatsApp is the fastest way to reach us — a member of the technical team replies, in English.
Measured, documented, signed.
What clients ask us most
Do you work in English throughout the whole process?
Yes — WhatsApp, site visits and explanations in English. The signed report follows the Spanish technical standard, because that is what banks, notaries and courts here expect, and we walk you through it so nothing is lost in translation.
Tell us about your building
Send us a WhatsApp — we reply within 24 working hours, in English.