1. Create as many Google reviews as possible. Use your happy clients, colleagues each will need an GMail or Google Suite emails for businesses (but could sign in using other email addresses).
See the video: https://youtu.be/Wtc_ERsZLvs
2. Create a blog page on your website, call it News and add content about the projects your company has delivered, construction projects, testimonials from happy customers, new projects etc etc. See the attached images
3. Create a Facebook page with the business name as the extension. Example https://www.facebook.com/myeasypc and start adding information and content
4. Take ownership of the Google Map listing and you can manage the reviews and other aspects of Google My Business. https://www.google.com/business/