The next few decades saw dynamic developments at WIBEBA. By the beginning of the 90s, the company comprised six core business areas and a firm intention of becoming more than merely a construction company. Intensive developments in the environmental sector saw this become a mainstay for the company. WIBEBA also expanded its presence in building construction and municipal services with additional affiliated companies.
It was not an easy time for the company: after a period of recession in the construction economy, the threat of a takeover by competitors and a difficult business situation, WIBEBA withdrew from the less lucrative corporate sectors and affiliated companies and underwent a change of ownership. The shareholding changed hands, first from Wiener Holding to Bank Austria and then, in 2001, to B&C Holding/B&C Baubeteiligungsgesellschaft. From the mid-90s onward, the company concentrated increasingly on its core competencies.