More than 80% of the Swedish single-family houses were built prior to 1977 when energyefficiency was introduced in the national building code. These houses are more than 30-40 yearsold and need renovation. This provides a unique opportunity for large-scale implementation ofenergy efficiency measures. However, there is a lack of business model to introduce full serviceenergy efficiency renovation packages that include consulting, contract work, follow-up andfinancing. Under the Nordic project “Successful Sustainable Renovation Business for Single-FamilyHouses – SuccessFamilies”, we have conceptualized a new business model to offer such a fullservice package to the Swedish homeowners. The new business could be offered by existingconstruction/renovation companies in collaboration with energy auditors/building consultants andheating system retailers/installers. The business could be targeted to houses built during 1971-80as the primary energy efficiency potential is significant in this segment. Especially houses that areon sale could be targeted because people usually do indoor renovation when they buy a houseand therefore, they may be interested in energy efficient renovations. Banks may consider postrenovation value of the newly-bought house based on planned renovation package from anentrepreneur to provide increased mortgage finance for renovation. Other options to improveenergy efficient renovation of single family houses include tax subsidies, preferential loans andguarantee on energy or energy cost savings.