There are lots of options available in Phuket. But for the more popular hotels and resorts in the better locations you should book at least a couple months in advance during high season Nov-May. Cheapest air con room rates start at around 1,000 baht in beach locations or 500 baht away from the beach, with proper resorts starting just under 100 USD and going right up. Best rates are usually found online by searching and many hotels offer best rate guarantees when you book direct. Most of the time you will pay more if you walk in.
For long term residence 2-3 bedroom furnished houses available for 7000-10000 baht/month/up only available far from the beach. But you have to pay 3 months' rent fee in advance. In addition, luxury villas can be rented at a range of prices, depending on the season and the location and size. Anywhere from 9,000-60,000 baht per night with deep discounts available for monthly or longer terms.
