Stambyte

What it means

A stambyte (pipe-stack replacement) is when the main pipes running through a building are swapped out: the lines for hot water, cold water and drainage (wastewater). Because these pipes sit inside walls and floor slabs, the bathrooms usually have to be stripped out and rebuilt at the same time. That is why the project ends up being both large and expensive.

The number to watch

Water and drainage pipes last roughly 30-60 years depending on the material, so a stambyte is typically needed at some point within that window. The cost tends to land in the order of 200 000-400 000 kr per flat, mostly because the bathrooms get rebuilt alongside the pipe work. That is an industry estimate rather than an official figure, so the exact amount varies with how extensive the job turns out to be.

What you should do

Check how old the building is and when the pipes were last replaced. If the pipes are approaching 40-50 years, ask the BRF (the housing co-operative that owns the building) whether a stambyte is in the maintenance plan and whether they have been saving for it in advance. A co-operative that plans ahead spreads the cost over the years, so it does not fall entirely on today’s members (meaning you, once you have bought).