It's not quite Lego, but a lot of neighbors who are expanding their homes are not using bricks and cement at all. In Hebrew it's known as בניה קלה bniyah kallah, easy or light construction. Except for a "shelter" made of poured cement, which is now required, it seems that buildings, or added rooms are specially coated styrofoam and plastic.
This new method can also be used in two or three storied homes. As you can see, it's based on metal supports. It's so funny seeing these coated styrofoam sheets piled up on the side of the road. I guess that next week they will be in the shape of a building like this one:
The skills and strength needed for this sort of building method versus the classic brick and cement is very different. Nowadays fewer construction is being done by Arabs in Shiloh. Also, when hiring Arabs, one needs an armed guard.
No doubt these new construction methods won't last as long as our double-walled brick house, and I wonder about the flammability of them, too. No doubt that they will need all sorts of smoke detectors in each room. That's what there is in Rami Levy and Yafiz, which are also constructed in this quick method.
I know that synthetic and wood construction, both rather flammable, is the norm in other parts of the world, but until now, most Israeli homes were safer -though more expensive per meter to build. If this helps people make affordable homes... who am I to complain?