Sähköinsinööritoimisto J Mannonen Oy is a limited company based in Helsinki, registered in 1992. Public buyers bought 18 t€ from it in 2022–2022; the largest buyer is Kaupunkiympäristön Toimiala, Helsinki (Helsinki). It has won 1 public contracts in EU procurement notices.
In business34 yrsregistered 27.5.1992
Sales to public buyers18 t€2022–2022
Contracts won1444 t€ in total
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Taxes
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.
Sales to public buyers
Largest buyers
Public contracts won
- Hankesuunnittelu ja optio kokonaissuunnittelusta, uudisrakennus, Heka Malminkenttä Lepistönkatu 2Helsingin kaupunki, kaupunkiympäristön toimiala, asuntotuotanto444 t€