Labi is a small Iban settlement about 40km south of the coastal road with four longhouses: Rampayoh, Mendaram Besar, Mendaram Kecil and finally, at the end of the track, Teraja.
If you go without a guide, how much of the longhouse you are able to see will depend on whether there's an English speaker there to show you around. If so, the cost of such a tour might be B$2 per person. Mendaram Besar also has an informal homestay programme .
These longhouses are a mix of the modern and the traditional: you will see women weaving baskets, though nowadays they may be plastic rather than rattan, and the longhouses have 24-hour electricity. Outside, among the fruit trees and clucking chickens, there is a rustic shelter for a row of gleaming cars.