Which immigration office for 7 day extension?

[SS1]

My 15 days on arrival expires after tomorrow and I need to get an extension.

Which immigration office should I go to for a 7 day extention to my 15 days on arrival? I found many immigration offices but not sure which one I need to go to. There is one at Chamchuri square conveniently located but when I called there I was told it's for the BOI of Thailand..

Could anyone recommend me which immigration office I should go to, what would be the best time of the day and how long should I expect to wait?

Also, do I need to bring more than these?

- passport

- copy of passport

-1x passport photo

- flight reservation

Many thanks!

[ubonjoe]

You can get a 30 day extension for a visa exempt entry at immigration for a fee of 1900 baht.

Chaeng Wattana immigration is the only office you can use. Map and info on how to get there is here: http://bangkok.immigration.go.th/en/location1.html

Hard to say how long it will take but is should not take more ant a couple of hours. It just depends upon how busy the are.

Early morning would be best.