Hi Hfraast
I used to live in Mangsit - which / who's house did you buy?
It may depend on when you are looking to do the work - there is a chance we will be back in Lombok and my husband (who started life as a builder) can help you. He knows plenty of good workmen in Lombok, but the problem is they don't speak english - so you need someone to act in the middle between you and the workers - and also to make sure that the quality is correct, and the price is right. I asked him if he knows anyone in Mangsit who is honest - his reply is he knows plenty of people in Mangsit but they are 'all the same' when it comes to how honest they may be. So on that basis I wouldn't recommend any of them
You could also go see Glenn at the Beach Club (next to Alberto's in Batu Bolong) - I recall he said he got onto someone who was excellent at organising the various workmen and materials they needed to build their bungalows (sorry Glenn, I think that is what you said? it was a while ago now...) - perhaps he can recommend someone for you.
Lucky you living in Mangsit - it is a nice part of the world. I love watching the sunset go down behind Bali.
Freo