Just want to understand, You are saying you have updated the Block Type model but new properties are not appearing in cms?

I assume you are updating from Code.

Yes that's correct, Not sure if we need to do anything so it shows up in the CMS 

Hemanth

There few options i can suggest 

1 - if you are using DXP while deploying, if you update module changes its best to  "use the Maintenance page" option. That helps you to sync your cms with the database.

2 - Its the work around I use - When I deploy and new properties are reflecting in page type/block type in cms. I normally go to cms -> Admin -> Content types -> select-your-content-type

Check if your property is not there, then try to create a test property from the interface (you can delete this property later). That will force cms to sync with the database and it will start showing your properties. 

Hope that helps

Naveed, Thanks for your input.

Strange no mattter how I add the property, I dont see it in  cms -> Admin -> Content types -> my-content-type.

Is there something else which I can do to view the new block created property.

Have you tried restarting your webapp?

Can you share the code of your new property?

Just to be sure - you can see content type but new property is not available?