How to add Schema markup in Local Business website?

You can use this tool to test your structured data code snippets:
https://search.google.com/structured-data/testing-tool

There are a couple of issues with your snippet.

(1) @type: Cleaning is incorrect. The @type can be from one of the accepted list of types:
http://schema.org/docs/full.html

I think the type you're looking for in the accepted list of types is 'DryCleaningOrLaundry'

(2) Your phone format needs to be correct => +12087491001

(3) You also need a contactType in your contactPoint object. See list of accepted values for contactType here:
https://developers.google.com/search...orate-contacts

(4) You need an image property as well - you can make that the same as your logo for now.


This corrected snippet should work now:

<script type="application/ld+json">
{
"@context": "http://www.schema.org",
"@type": "DryCleaningOrLaundry",
"name": "London Commercial Cleaners",
"url": "http://londoncommercialcleaners.com",
"logo": "http://londoncommercialcleaners.com/wp-content/uploads/2015/11/logo1.png",
"image": "http://londoncommercialcleaners.com/wp-content/uploads/2015/11/logo1.png",
"address": {
"@type": "PostalAddress",
"streetAddress": "39a Welbeck Street",
"addressLocality": "London",
"addressRegion": "England",
"postalCode": "W1G 8DH",
"addressCountry": "United Kingdom "
},
"telephone": "+12087491001",
"openingHours": "Mo, Tu, We, Th, Fr, Sa 06:00-20:00",
"contactPoint": {
"@type": "ContactPoint",
"telephone": "+12087491001",
"contactType": "customer service"
}
}
</script>


Note: Ignore the error with 'url' in the testing tool. That appears to be an error with the testing tool itself.