An elaborate article on the architecture of Kerala requires a little research, so here I will be only dealing with the Naalukettu. Basically speaking they are the traditional houses of Kerala. They have some good wooden details and are made incorporating all the Vernacular architectural features of Kerala. You can find a detailed plan of the Naalukeetu and also some views of the sketch up model of a Naalukettu which I had made a year ago.
One thing I plan to do, if I pursue a career as an architect(Well thats a big IF) is to design a Naalukeetu for my parents . For those who are ignorant about Naalukettu have a look at the description from Wiki below the slideshow.
Nālukettu is the traditional homestead of old Tharavadu where many generations of a matrilineal family lived. These types of buildings are typically found in the Indian state of Kerala. The traditional architecture is typically a rectangular structure where four halls are joined together with a central court yard open to the sky. The four halls on the sides are named Vadakkini (northern block), Padinjattini (western block), Kizhakkini (eastern block) and Thekkini (southern block). The architecture was especially catered to large families of the traditional tharavadu, to live under one roof and enjoy the commonly owned facilities of the marumakkathayam homestead.
Thatchu Shasthra, or the Science of Carpentry and Traditional Vasthu, was the governing science in this architectural form. This branch of knowledge was well developed in the traditional architecture of Kerala and has created its own branch of literature known under the names of Tantrasamuchaya, Vastuvidya, Manushyalaya-Chandrika, and Silparatna.
The lay out of these homes were simple, and catered to the dwelling of the large number of people usually part of a tharavaadu. Ettukettu (eight halled with two central courtyards) or Pathinarukettu (sixteen halled with four central courtyards) are the more elaborate forms of the same architecture. Every structure faces the sunlight, and in some well designed naalukettu, there is excellent ventilation. Temperatures, even in the heat of summer, are markedly lower within the naalukettu.