Prioritizing deep renovation for housing portfolios
Artikel i vetenskaplig tidskrift, 2019

Cost-effectiveness of deep renovation has been assessed thoroughly on a building level. Such studies pro- vide limited guidance when prioritizing renovation measures for a building portfolio. On a stock level, building-stock modelling is commonly used to assess impact of renovation on a national and city level, targeting stakeholders operating at a planning or policy level. However, due to methodological choices and data availability, assessment of property owner portfolios is lacking. The aim of this paper is to cal- culate and spatially differentiate cost-effectiveness of deep renovation using equivalent annual cost and increase in assessed building value for a portfolio owner as a first step in prioritizing deep renovation within a building portfolio. A bottom-up engineering-based model is applied utilizing building-specific information for a municipal housing company portfolio in the City of Gothenburg, Sweden, consisting of 1803 multi-family buildings. Energy demand for space heating and hot-water is calibrated using mea- sured energy use from energy performance certificates. Deep renovation is assessed by applying a pack- age of measures across all buildings. Results show average energy use reduction across the portfolio of 51% to an average cost of 597 EUR/m 2 living area. While average energy cost savings account for 21% of equivalent annual cost, there are seven buildings where more than half the annual equivalent cost of renovation is covered by energy cost savings. Similarly, the distribution of change in assessed build- ing value is large for individual buildings, ranging from 0–23%. Aggregating results to larger areas tend to average out results while differences between individual buildings within areas persists. As such, the cost-effectiveness of deep renovation should be assessed on a building-by-building basis rather than for an area or neighbourhood. The results are intended as a first step in prioritizing deep renovation within a building portfolio and further detailed assessment is needed.

Deep renovation

Portfolio assessment

Energy efficiency

Cost-effectiveness

Building-stock modelling

Property valuation

Författare

Magnus Österbring

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Clara Camarasa

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Claudio Nägeli

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Liane Thuvander

Chalmers, Arkitektur och samhällsbyggnadsteknik, Arkitekturens teori och metod, Forskning - Arkitekturens teori och metod

Holger Wallbaum

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Energy and Buildings

0378-7788 (ISSN)

Vol. 202 109361

Omställning mot hållbar tillväxt av byggnadståndet på områdesnivå

Energimyndigheten, 2014-07-01 -- 2017-12-31.

Drivkrafter

Hållbar utveckling

Styrkeområden

Building Futures (2010-2018)

Energi

Ämneskategorier

Samhällsbyggnadsteknik

DOI

10.1016/j.enbuild.2019.109361

Mer information

Senast uppdaterat

2019-10-29