Can I extend my work permit in Thailand 6 months in advance before its expiration?

Work Permit Advise:

Can a work permit be extended 6 months in advanced? Example: Expiration of my work permit is May 2019, but needs to extend for 3 months until August 2019.

I usually do my visa back in my home country every August (multiple entry Non-B) but this year, I only got a single entry with their new rule that the permit has to be the same month at least as the visa. So I was only granted single entry and planning to extend by next month as well that would match my work permit validity.

Is the 3 month extension of the permit possible as early as next month if the expiry is 6 months from now?

Thanks :)