For the website http://www.electriciteitswerkenbotteldoorn.be/  I made the following changes

1) Added google analytics tracking script
2) Checked meta tags are they are there
3) Added local SEO
https://whitespark.ca/blog/why-your-local-business-schema-sucks-and-how-to-make-it-better/
4) Create robots.txt
https://support.google.com/webmasters/answer/6062596?hl=en
http://www.robotstxt.org/robotstxt.html
5) Create xml site map
https://www.xml-sitemaps.com/
6) Added to google search console
https://www.google.com/webmasters/tools/home
7) Submit Sitemap to google console
8) Ask google to Fetch Wesbite and Index (mobile and desktop)
https://www.google.com/webmasters/tools/googlebot-fetch?hl=en&authuser=0&siteUrl=http://www.electriciteitswerkenbotteldoorn.be/
9) Added links to other websites that Google crawls already – There more the better
10) Google check robots.txt is working
https://www.google.com/webmasters/tools/robots-testing-tool?hl=en&authuser=0&siteUrl=http://www.electriciteitswerkenbotteldoorn.be/

Then register your business on https://www.google.com/business/  as at 7 Feb 2017 this is a free service.

IMPORTANT:  It can days and sometimes weeks for these changes to take effect in the google search.