The prevailing housing shortage and the developed considerations of environmental issues are todaytwo current topics. Bollnäs county is an example of a county that works to maintain and actualize itsenvironmental goals, especially in new constructions. Passive houses are a way to buildenvironmental friendly and it is a concept that is becoming more and more common. The concept isabout maximizing heat gains and minimizing heat losses. This is achieved through an air-tightenvelope, certified building components, exhaust and supply air ventilation where heat is regainedfrom the extract air and buildings with low U-values. This project presents a change of an existingdetailed development plan from general purpose to housing. The aim of the project is that thehouse, with a restaurant on the bottom floor, must meet the requirements for passive houses andharmonize with the surrounding environment.The project initiates with a literature study followed by an analytical study with the aim to gatherknowledge about both passive houses as well as the surrounding area of the property. Conformationand calculation are two essential parts of the project. The shape of the house, the design and wherethe house is located in the property are adjusted to both the requirements of passive houses and thecultural history of Bollnäs.The calculations performed in PHPP indicate that the requirements for passive houses are met on thebasis of the conditions in this project. Drawings such as site plan, general plans, facades, sections anddetails are presented together with illustrations of the finished house.The main problem regarding the projection of passive houses lies in the absence of its actualmeaning. The concept is about compensations and that every house, regardless of building systemand conformation, has the possibility to be certified as a passive house.