Sotecnisol is a construction, engineering and energy group founded in Lisbon in 1970 and based in Camarate (Loures), with more than 20 companies and consolidated turnover of €87.5 million in 2025. It lists Norway among its six country delegations, and its Norwegian branch, SOTECNISOL NORWAY (org. no. 929515072), has been in the Brønnøysund register since September 2022 with a registered activity of waterproofing tunnels.
Sotecnisol was founded in Lisbon in 1970 by Sá Morais de Castro, Hermano Medeiros and Marcelino Carvalho. Carvalho sold his stake in 2004 and Hermano Medeiros’s daughter sold hers in 2016, leaving the Sá Morais de Castro family with 100% of the capital; José Luís Castro has led the company since 1996. The operating company, Sotecnisol, S.A. (NIF 500274819, share capital €2.07 million), is registered in Camarate under CAE 43290 and 35113, with an object that runs from public and private works, waterproofing and façade cladding to solar and wind systems, cogeneration, energy audits and water and wastewater treatment equipment. The group now counts more than 20 companies; Lusa reported consolidated turnover of €87.5 million for 2025, up 12%, driven by construction-materials retailer Obras360 (€20 million), temporary-work firm 2WORK (€8 million), Output Engenharia and KeepOn, together with Sotecnisol’s Spanish and French operations.
Norway is the group’s Nordic outpost. Sotecnisol’s website lists six country delegations — Portugal, Spain, Angola, France, Mozambique and Norway — plus completed works in Morocco, Mali, Côte d’Ivoire, Cameroon, Cape Verde and Algeria. In a January 2024 interview with ECO, José Luís Castro named Norway alongside Portugal, Spain and France among the group’s markets and described its Spanish business as including the waterproofing of roofs and tunnels; the same report covered Sotecnisol’s entry into tunnel work in France. The Norwegian branch, SOTECNISOL NORWAY, was entered in Norway’s Central Coordinating Register for Legal Entities on 3 September 2022 as a Norwegian-registered foreign enterprise (NUF) under NACE 43.990, other specialised construction activities, with its registered activity given as waterproofing of tunnels (vanntetting av tuneller) and the Camarate head office as its business address. The register shows no Norwegian VAT registration and no reported headcount for the branch.
Tunnel waterproofing is a specialist trade, and Norway’s mountainous road and rail network relies on a large number of tunnels. Sotecnisol’s Norwegian registration is narrow by design: not general construction, but the tunnel-sealing capability the group has also carried into Spain and France. For Portuguese contractors weighing the Nordics, it is an example of entering through a technical niche with a NUF branch rather than a local subsidiary.
On 27 January 2026 the group reported 2025 consolidated turnover of €87.5 million, up 12%, and set a goal of €100 million for 2026 (Lusa via ECO). Two years earlier, in January 2024, ECO put the group at 24 companies, 650 employees and €70 million in turnover, with €2 million of investment planned for international expansion and new business units.
Sources: nif.pt and racius.com (Sotecnisol, S.A.; Sotecnisol SGPS); Brønnøysund Register Centre (org. no. 929515072); sotecnisol.pt; ECO, 30 January 2024 and 27 January 2026 (Lusa). Spotted an error? Email miguel@fractio.se.
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