Hello
In Najomtien (on Ban Amphur beach)..so outside busy center and rather far out, Baan Somprasong condominium if of course you wish to stay minimum one month (Airbnb under 1 month is not legal).. officially no pets but allowed without issues by management, committee and co owners.. right on the beach + gardens and huge pool, very quiet.. you can find it on Google, there is a website
Have a good day