There are many real estate rental sites available in Thailand. These websites should be the first place you look while searching for a place to rent. At the very least, rental websites give you an idea of the average rental cost of the area you’re interested in.
Keep in mind that prices listed on websites are often negotiable. This means getting a discount of 20% from the list price is not unusual. But it may take a while to find a place suitable to your needs.
