The capsule tower typology was a well-known visionary architectural idea during the 1960-70s. However, the few materialized projects were criticised mostly due to their use of standard-size capsules and their lack of adaptability to user needs. A new methodology for capsule tower design is proposed by means of the use of a genetic algorithm. in order to emphasise the generative approach of the original projects; it adds area and light optimisation to secure size variation and light comfort. The results show a set of variations in terms of floor layouts, capsule volumes, front facade areas and interstitial spaces amongst modules, which go beyond the uniformity of the earlier strategies. These early findings suggest that this generative approach has the potential of re-examine old design projects by increasing their feasibility and adaptability; this approach also suggests the possibility of combining this concept with additional algorithmic implementations to study other ideas.