Wang Chao Mueng Phatthalung (Lord of Patthalung Palace) comprises 2 groups of buildings namely, Wang Kao (Old Palace) and Wang Mai (New Palace). The Old Palace is a group of 3 Thai traditional style buildings built on high stilts, surrounding a deck in a U-shaped planning. The New Palace comprises 5 building built on high stilts, surrounding a sand courtyard, which is raised high above ground level and curbed with retaining walls. Wang Kao was the residence to Phraya Worawutwaichangwang (Noi Chandrarojwong) and Wang Mai belonged to Phraya Aphaiborirak (Nate Chandrarojwong). Both palaces have been included in the same boundary called “Wang Chao Mueng Phattalung”.
Phraya Worawutwaichangwang was Phatthalung Lord during 1869 – 1888 AD he was the founder of the Old Palace but the date has not been recorded. In 1889, King Rama V paid a royal visit to the south, thus the Lord had a new house built to the front of his residence in a contemporary style to be used as a reception house called “Na Ruean” (House Front).
Phaya Aphaiborirak became the Lord after Phaya Worawutwaichangwang, his father, in 1891. He was the first Governor of Phatthalung after administrative reorganization in 1900. He had his palace built behind his father’s Old Palace and had lived at this New Palace until he passed away in 1938.
The Chandraroj wong Family has given both the Old Palace and the New Palace into the care of the Fine Arts Department for conservation.

Source:
http://asaconservationaward.com/index.php/2016-06-13-15-21-44/building-2537/146-wang-chao-mueang-phatthalung