Renting a flat for yourself is great for privacy, but some expatriates choose to move into shared flats to save a bit of money and maybe a bit of companionship, especially in a city like Saigon. It is a great way to meet new people and make connections. Most people in shared flats share costs and chores equally. However, if there is a master bedroom or a private bathroom, the person who takes these extra perks may be expected to pay a bit more.
Make sure you can cohabit with your future flatmates. Have a chat with them to see if you have compatible interests. Also, their employment can be a major factor. If you are working a Monday-to-Friday job, you might not be a good fit in a house full of English teachers who generally work weekends and tend to go out mid-week. It is also prudent to talk about rules of the common areas, such as cleanliness, shared utensils, and space in the refrigerator. Be sure to know the rules on overnight guests, such as boyfriends, as well as rules on noise levels. Finally, use your common sense. If you like to have guests over daily, it may not be wise to share a flat with someone who is expecting quiet at all hours.
Most shared rentals are filled via word of mouth, social media and websites such as Craigslist Vietnam, Facebook and expat forums.
For information on living in Saigon go to Saigon: Not Yet a Tourism Hub