In the past, Nextensa was a Belgian REIT called Leasinvest Real Estate investing in a diversified real estate portfolio in an important way, as well geographically, as by type of buildings. In 2006 a first step was taken in the direction of an important geographical diversification by the acquisition of Leasinvest Immo Lux. In 2014 the company further diversified towards a third country, namely Switzerland (divested in 2017) and in 2016 to a fourth country, Austria.

In 2021, Nextensa became a mixed real estate investor and developer as a result of the business combination with Extensa.

Growth is important for Nextensa to achieve economies of scale, to diversify the portfolio per country, per tenant, per sector and per type of building. The real estate company endeavors to blend a real estate approach with a financial logic