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  • August 4, 2020
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Subdivisional Works

Mainswest has completed numerous subdivision projects for various developers, builders and asset owners including RJ Vincent, Georgiou Group...
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Mainswest Services

  • Underground Power
  • Communication Services
  • Commercial Construction
  • Substation Upgrades
  • Subdivisional Works
  • Technical Services

Recent Posts

Mainswest Strengthens Fleet with New Vehicles and Excavator
  • April 29, 2026

Mainswest Strengthens Fleet with New Vehicles and Excavator

Osmose Acquires Mainswest Pty Ltd
  • January 29, 2026

Osmose Acquires Mainswest Pty Ltd

Shelley West Breaking Ground Ceremony
  • July 15, 2021

Shelley West Breaking Ground Ceremony

Trigg Last Pole Ceremony
  • July 15, 2021

Trigg Last Pole Ceremony

About

Mainswest Pty Ltd, An Osmose Company, is a civil and electrical contracting organisation specialising in the construction and maintenance of underground utilities for both private and government clients throughout Western Australia.

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Services

  • Underground Power
  • Communication Services
  • Commercial Construction
  • Substation Upgrades
  • Subdivisional Works
  • Technical Services

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  • About Us
  • Core Competencies
  • Projects
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Contact Us

8b Dellamarta Road,
Wangara WA 6065

  • (08) 9303 1540
Email Us

ACN 161 453 783
ABN 76 161 453 783
EC Lic. 10816

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