My idea is to utilize tunnels or ditches with retaining walls, a roof and a floor to make passage between structures feasible at all times. A properly designed, built and drained tunnel or ditch would make a comfortable passage possible. Of course this wouldn't be very doable in areas with high water tables or shallow dirt over rock.
I lived in a 30ft RV for a year and my son used a camper for a playroom. he did not at all mind the walk over even in the winter... -10C is really cold here and doesn't happen much.
Make sure it is really well engineered.... might be cheaper to build a stick house the size you want... or a mostly (from the road anyway) invisible cob house.
Of course this wouldn't be very doable in areas with high water tables or shallow dirt over rock.
Or in areas where toxic soil gasses like radon are present.
Depending on soil type it could get very expensive to engineer and build tunnels strong and safe enough to last the life of the buildings.
As for the trellis, why not a green house tunnel and bern some walls up and park some black water barrels for solar heat storage (benson institute walapini / pit greenhouse). a double sheathing should do well to hold the warmth in. Then you can graze as you go from building to building. Might help keep some of the bug population down too, and you can build it out of conduit to run your electrical, telephone, etc from building to building.
Another idea, if you use tarps, burlap, reed, etc is to take some smaller trees that like to grow near each other like sassafras (bamboo might work too) and pull them together and cover them with your tarps. The native indians use to make them. They look similar to a teepee, but the trees are still rooted and they still grow. Wind is less of an issue. I have seen one done at the Beach where they used straw beach mats to surround it. Guess they were lazy in their reconstruction.
I've thought about building a cellar under a 200 s.f. structure -- it would make a good root cellar, at the least. And then tunneling under to the next structure -- but I think that's too much work for too little return, unless you make the tunnel wide enough to store stuff in it, too?
Here is what I did:Both 200sqft structures have their roof line the min legal distance apart.Inbetween,I placed a large wooden "trellis".This "trellis" has no permanent roof but is desighned to have a canvas tarp streached across it.
Just a thought.... what about in case of a fire? maybe a brick trellis? A lot of these small houses are off grid and far from a fire department. It would be a shame to loose everything when half could be saved just by having a no burn zone between buildings.
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