I am looking for a bureau which can provide an excellent and speedy translation service, from English into Thai language. Any recommendations ?

I've used SVS or STS (can't remember) a couple of times, which is located near the American consulate, back from the river between the river and the north-eastern edge of the moat, tel: 053 232 069. Done some good work for me and at a reasonable price, although others may have had problems here. I think CM Uni also do translations? Whatever you do don't go to the place adjacent to the Three Kings Monument who advertise in the consulates as I found them to be about 3X more expensive.

For *excellent* results, expect to pay near Western prices, and perhaps consider contacting a translator or bureau overseas.

I've used SVS or STS (can't remember) a couple of times, which is located near the American consulate, back from the river between the river and the north-eastern edge of the moat, tel: 053 232 069.

I've also used their services and found them reasonably priced and fast including sending to the Ministry for certification. However if you are talking about a lot of pages then it can get quite expensive.