Design and R&D Service Agencies in Lahti region

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MAIN interiors

Visiting & Postal Address

MAIN interiors Oy
Mariankatu 6
FI-15110 LAHTI




MAIN interiors is an interior architecture office that specialises in the interior design of public spaces. We prepare all our designs according to the terms of user-oriented design while respecting the customer’s wishes and needs. For our interior designs, we strive to choose products by local designers and companies as well as natural and recycled materials where possible.

Designers & R&D Experts of the Company

Mari Hietikko | Interior Architect, Entrepreneur

Inkeri Heikkilä | Interior Architect, Entrepreneur


  • Interior design for reproduction facilities. Customer: Flexolahti Oy.
  • Interior design for an office. Customer: Texmoda Fashion Group.
  • Interior design for a shop and cafe. Customer: Luomukauppa Chaga.
  • Entertainment facilities. Customer: New Port Kotka.
  • Conceptual design for a palliative ward. Customer: Lahti City Hospital.

Main Branch

Interior Design.


3D Modelling.
Furniture Design.
Interior Design.
Lighting Design.
Spatial Design.

Special Know-How

Public spaces.