JaJa group

Building services and electrical contracting for industrial, clean-room, food and property sites in Finland

Mäntsälä, FinlandFounded 2021jaja.fiWebsite technologies

+ Add to sales board

Highlights

  • New on EvolcAdded 2026-10-30

About JaJa group

JaJa Oy provides HVAC (LVI) and building services and electrical contracting. HVAC work includes flow measurement, balancing and adjustment with a TA-Scope instrument, pressure drilling, clean-room and industrial installations, acid pickling and cleaning, and special connections and certifications. Electrical services cover new installations, electrical renovation, and maintenance of ventilation units, pumps and electric motors.

Customers include commercial and industrial properties, food and pharmaceutical production, packaging facilities, laboratories and clean rooms, as well as detached houses. The company was formerly named Reebu Oy, which the website states has been renamed JaJa Oy.

The legal entity, JaJa group Oy, was founded on 29 June 2021 and is registered in Mäntsälä, Finland, which is also its headquarters. The website is published in Finnish only.

Product: HVAC and electrical installation, measurement and maintenance services for buildings and industrial sites

Jobs at JaJa group

No open positions listed right now.

More construction companies

  • Jake Rakennus

    Industrial, commercial and public building construction for clients in Ostrobothnia, Finland and Sweden
    Pietarsaari, FinlandConstructionFounded 2003
    New on Evolc
  • Jakea

    Construction, project management and apartment rental for residential projects in Hämeenlinna and Helsinki, Finland
    Hämeenlinna, FinlandConstructionFounded 2022
    Young companyNew on Evolc
  • Jakirak

    Construction contractor for private homes, companies and housing companies in Kuopio and North and South Savo, Finland
    Kuopio, FinlandConstructionFounded 2025
    Young companyNew on Evolc
  • Jalasjärven Sähköasennus

    Electrical contracting and installation for households, businesses and farms in South Ostrobothnia, Finland
    Jalasjärvi, FinlandConstructionFounded 1994
    New on Evolc
  • Jallun Hiekka

    Aggregate sales, delivery and earthworks for households, businesses and municipalities in South Ostrobothnia
    Vimpeli, FinlandConstructionFounded 1992
    New on Evolc
  • Jaloin

    Log house assembly, small-house construction, renovation and crane lifting for clients in Kymenlaakso, Päijät-Häme and southern Finland
    Kimola, FinlandConstructionFounded 2020
    New on Evolc

All construction companies →

Website technologies

Older, unverified list. Detection dates and supporting evidence are not yet available.

  • Elementor
  • Google Analytics 4
  • Google Universal Analytics
  • PHP
  • WordPress
  • jQuery
  • nginx