Rakennustoimisto O.Hämäläinen Oy is a limited company based in Helsinki, registered in 2014. Its taxable income in 2024 was 796 t€ and its income taxes 162 t€. Public buyers bought 2 000 € from it in 2024–2024; the largest buyer is Kaupunginkanslia, Helsinki (Helsinki).
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Taxes
Measured by taxable income, Rakennustoimisto O.Hämäläinen Oy is in the top 10 % of the industry class other engineering design and technical consultancy incidental to building construction (823 companies with taxable income; median 19 t€, 42 times the median).
Taxable income is the profit as calculated for taxation, not revenue. Public data from the Finnish Tax Administration; figures for 2025 are published in November 2026. Revenue, financial ratios and employee numbers are shown once the company has filed its financial statements digitally.