In this paper, the study focuses on the potential material exchanges between indoor farms and existing buildings which is or will be developed for residential use. Based on the material flow, an architectural model, Farmhal1, is proposed as an example of possible interventions. Further on, a workflow is constructed for the assessment of existing buildings which could be suitable for the proposed intervention. The assessment includes the renovation requirements, future energy reduction, investment and earnings based on computer simulations, business plan and local factors.