You might want to consider 2 bedroom or connecting room instead.
However, hotels near junceylon mall, most of them do not comes with 2 bedroom. most of the newer hotels, doesnt comes with bathtub for the lower tier rooms. Have stayed before at tiger hotel (no connecting room). Their hotel seems old, kinda dark inside especially in the evening (they do not have lights at the corridor sometimes), but most or all of their rooms comes with bathtub. Their deluxe room comes with jacuzzi.
So far, the best hotel that we have stayed in that area is Pimnara Boutique Hotel. However, only their higher tier rooms have bathtub (those bowl type).
Their service is good, only 2 floors. Hotel is located within the junceylon mall.
Have tried few hotels in patong area, epsecially those nearby junceylon mall, cox the cost of taking grab and tuk tuk is very expensive. Tiger hotel, sira grande, expat hotel patong center, bauman residence (2 bedroom), hemingway silk, patong hemingway hotel, Pimnara Boutique Hotel.
If you are planning to stay along the soi sansabai , those hotels located in that area, might be quite noisy until the midnight.