This area is the southern continuation of East Pattaya. It starts roughly where the railway finishes and is bordered by Sukhumvit Road in the west and the 331 in the east.
Like East Pattaya this area is primarily residential and favoured by ex-pats for its easy access to the highways and the soon-to-be extension to the highway directly to Bangkok.
Another boom to this area will be the enlargement of the U-Tapao International airport which will no doubt rise land values and give easy access to many destinations in Thailand and further afield. In anticipation of the airport and motorway extension there is lots of road widening happening which is also bringing in a lot of business. The knock on effect of that is more villages being developed in the area.
There is plenty to do in Huay Yai, especially if you like some golf. There are several courses in the immediate vicinity including Pattaya Country, Phoenix Gold, Country Club and also a new course called Chee Chan Golf Resort. This course is next to the Khao Chee Chan Buddha Mountain, which can be seen from every hole! Closeby are several other attractions including the Silverlake Vineyards where you can cycle around the vines sampling the wine or dining in the restaurants. There is also the Wat Yaan Chinese Temples which are well worth a wonder around. If you have little ones with you, you may prefer to cool off at the Ramayana Water Park.
Further south there is the famous Nong Nooch Botanical Garden to explore, and just past Bang Saray there is a military base which grants access to some of the best beaches in the area.
Pattaya is still within reach but Huay Yai is an expanding area with lots of amenities on its doorstep, and easy access to airports. New villages are going up all the time, many with private or communal pools, and there is something for every budget.