Table 1.

Comparisons of lead-time (months) and cost productivity (SEK/m2 GFA) for conventional and IHB timber multi-storey building projects for the year 2018

Comparing factorsConventional house
buildingb
IHB timber
house building
Number of multi-storey housing projects3915
Lead-time 2018, mean value [months]20.617.3
Lead-time development 2014–2018+ 39%+ 27%
Lead-time efficiency 2018, median value [h/m2 GFA]0.530.09
Construction cost efficiency 2018, mean value [SEK/m2 GFA]19,78314,930
Construction cost productivity growth 2014–2018a+20%–19%

Notes:

aConstruction costs for comparisons between 2018 and 2014 was adjusted downwards using the Contract Index to get cost figures in 2014 SEK. bBased on data in Koch et al. (2020). It was inaccessible to deduct if some IHB projects were included in the data set

Source: Author’s own creation

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