The living-dining-kitchen area use an award-winning diagonal design to create the smallest house in the world of The Sims that offer comfort for a family of 4 sims! Made in October 2012.
I have no idea how to create such small lots, I just downloaded them from ModTheSims2.com
Tiny house on a 1×1 lot under $20.000 designed for a starter family with 2 sims. Notice the efficient usage of the space under staircase. Size: 67 squares (not including 5 squares of staircase void). Designed in July 2012.