tschudi was mostly active with buying and selling land in aker, now a part of oslo. in 1898 he bought the 400-acre farm øvre høybråten, which was parceled out in 1905. solemskogen near maridalsvannet was bought in 1897 and parceled out in 1903, in addition he parceled out økern as well. tschudi was also active in bærum. in 1912 he bought vestre haslum, which soon was split in 360 lots and sold. the area was nicknamed tschudimarka.