Vikings used to live in so called longhouses. This is a special way 
of building a house during their times. It is a very simple architecture
 but effective. 
ground floor:
Longhouses were approximately 13-18 meters long and 3,5-7 meters wide. The longest one found was about 50-60 meters long.
People and animals lived together; there was no separation within the house.
a... entrance and working place
b... living room with a fireplace in the middle
c... stable for animals
The
 roof was made of stones, grass, and moss. Pillars were put up parallel 
to each side to keep the roof up (3). They were not centred in the 
middle; therefore, the middle part (2) was wider than the outside parts 
(1) which were narrow.  Right above the fireplace there was a hole in 
the roof to lead the smoke out of the house. 
front view:
To
 each wall was put an additional one to keep the warmth inside the house
 - because the walls were pretty thin -, and to keep the whole building 
stabel.
The 
 Viking museum in Borg, Lofoten is built after an original longhouse on 
nearly the same place. The original house was discovered in 1983 and up 
until 1989 there had been a big research programme. This very house was 
83 meters long and 9 meters high.
(c) http://openarchaeology.info/institutional-members/lofotr-viking-museum-no 


 
I really like the pictures you draw, it makes it a lot more vivid.
SvarSlett