AbstractThis work focuses on the two towns most exposed for flooding in Norway: Lillestrøm which lies alongside Lake Øyeren, and Hamar which is situated near Norway’s largest lake, Mjøsa. The main objective of this work is to produce damage curves for roads, railways and detached houses for these towns. However, in the Lillestrøm area, with fewer significant data, damage curves were produced only for roads and railways. A risk analyses was made by connecting a flood frequency analysis, geographical information and cost data from the big flood in 1995. Due to the lack of sufficient cost data, more focus was given to the uncertainties of the analyses rather than the actual results. The results showed that the expected damage (risk) from flooding for all the detached houses in the Hamar region was 12 million NOK. The expected damage (risk) from flooding railways and roads are 37 375 NOK and 280 800 NOK, respectively. In Lillestrøm the expected damage (risk) from flooding railways and roads was equally to zero, due to the huge flood protection works in this area. The results from the uncertainty analyses showed that more work needs to be performed to better estimate the total risk.