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There's a lot of newbuilds.

Yeah, Helsinki is likely to be even more expensive.

Fewer newbuilds:

https://www.etuovi.com/myytavat-asunnot/lahti?haku=M1572600180

Lahti, paritalot

The changes in price over the last decade has been quite severe, and I don't think it is just in housing. I feel like a lot of things have gone up, while the wage increases haven't matched.
Is there a CPI that informs the inflation rate? I sometimes wondered as a kid if it could be hacked by engineering price suppression of the indexed products, while increasing the cost of others.