Individual renovation roadmap (iSFP) — your step plan for energy retrofits

The iSFP is a federally standardised consulting tool for residential buildings. Developed by the German Federal Ministry for Economic Affairs and Climate Action, it can only be issued by certified energy-efficiency experts listed in the dena directory. It describes the current energy condition of your building, defines measure packages and shows their effect on energy demand, CO₂ emissions and operating costs.

Unlike a pure modernisation note or an energy certificate, the iSFP is a full step plan: it makes transparent what you start today, what becomes relevant in five years — and how everything fits together so that nothing has to be redone or undone.

The iSFP delivers planning certainty. Instead of individual gut decisions, you get a technically modelled roadmap — and a report you can use to brief tradespeople, convince banks and file funding applications. Following the iSFP for subsequent retrofits can also unlock the so-called iSFP bonus on top of standard funding.

Typically, the iSFP shows that the obvious measure is not always the best. A new heating system, for example, only delivers its full effect after the building envelope has been insulated. The iSFP clarifies this order and prevents expensive rework.

An iSFP can only be issued by energy-efficiency experts listed in the dena expert directory for federal funding programmes. This is a hard requirement: without that listing, the report is not recognised by BAFA or KfW. We are listed in the dena directory for residential buildings and meet the requirements for single-family homes, apartment buildings and mixed-use properties.