Study of optimization of two projects in "Million Program" areas : - a sustainable point of view in a suburb to a big city and a suburb to a small town

Sammanfattning: The renovation and maintenance projects in the “Million program” areas are currently ongoing in many parts of the country. As the stocks in many descriptions have similar conditions with regard to urban structure, construction technology and socio-economic situation, there is great potential for comparison. This means that different results from a renovation may be linked to other factors than the execution and choice of measures. In this thesis two different “Million program” areas have been compared, one in the suburbs of a big city and one in the suburbs of a small town (which will be referred to as ftS and fts in the report). The comparison will be evaluated from the three sustainability perspectives: social, ecologic and economic. To make these three perspektive interact is difficult but when all perspectives are considered as sustainable the “Point of Optimization” has been achieved. The projects that have been involved in this bachelor thesis are Nystad 1, which is owned by Svenska Bostäder, and Drabanten 3, which is owned by Nybro Bostad. Nystad 1 is placed in Akalla which is a suburb to the big city Stockholm and Drabanten 3 is placed in Kungshall which is a suburb to the small town Nybro. Both projects change the ventilation system to FTX, replace windows, put solar cell systems on the roof, renovate the kitchen and the bathroom and additional insulation to varying degrees. The scale of the renovation in Akalla is larger as the entire building to the core gets removed and rebuilt and a total refurbishment of the yard is also included in the project. The purpose of the report is to produce values linked to each perspective of sustainability that are comparable in both projects to evaluate the connection between the results and the placement in either ftS or fts. To produce results that are measurable within every aspect a customer survey was sent out, the reduced usage of energy were calculated and the economic profit was estimated. The project in Akalla is more extensive and the total cost amounts to just under 1,3 million SEK per apartment. Prior to the renovation the rent was 971 SEK/m2 which will be increased with 25% after the renovation. For Kungshall the total cost amounted to roughly 1 million per apartment and led to an increase of rent by 28% from the original rent which was 795 SEK/m2. The participation rate of the customer survey in Akalla was lower than in Kungshall which got a better result in all categories. The reduced use of energy of the project in Akalla is estimated to 32% while the project in Kungshall merly reached 21%. The use of method in this report determine that none of the projects successfully reached economic profit with their own company-specific calculation interest. However, the analysis of vulnerability shows that after 30 years Kunghall has gained a profit of 3.2 million SEK. Akalla is expected to reach sustainability from a social and ecological perspective but not from an economic perspective. In Kungshall the social and economic perspective are assessed to be sustainable while the ecological perspective is not, due to the fact that it did not reach “Klimatiniativets” goal at a reduced energy usage of 30 %. The result in this thesis concludes that the placement in either ftS or fts impacts the sustainability from the social perspective and normally also from the economic perspective, although not with the specific circumstances regarding this ftS due to Järvaavtalet. The sustainability from the ecological perspective is not connected to the placement but merely a result of choice of measures and execution. However, as the sustainable development is an interplay between the different perspectives, the result from the ecological perspective is also indirectly affected by the placement in either ftS or fts.