Trygg Renhold A/S Stor-Oslo Last updated 11 Sep 2025 Type: Rengjøringstjenester Licensing number: 2076 0006 Environment branding: Svanemerket Brand: Trygg Renhold Licensing company: Trygg Renhold A/S Stor-Oslo Licensing website: http://www.tryggrenhold.no/ See also Svanemerkets krav til renholdstjenester