Requirements:

- 3 bedroom

- swimming pool

I think there's very few houses with a swimming pool in Bangsaen.  Some of the larger Moo Baan estates may have a communal pool.

 

I think the concept of a pool open to the sun is more of a Western feature (that's why it's quite common in Pattaya and Hua Hin), but Bangsaen is predominantly a Thai persons resort. 

 

As said above there are not many houses with their own pool available in Bangsaen. 

 

The housing market in the main drag of Bangsaen around Between Sukhumvit, the beach, Long Haad Road and Laem Than has very limited houses. Outside this area though are many moobahns some with communal swimming pools. You can either drive around and ask the security at each one or try the Thai real estate websites. I am not sur eif sharing their names is allowed on here but they are found with easy browser searches. Then go look for Chionburi/Maung/Saensuk

 

Good luck. Its reasonable area to live.