pylon:
beside the sensor
Then 1-Wire would not make sense 
I don't sum it up yet. But 15, 20, 30 meters is nothing in a house.
From living room to bed room 8m...
From bed room to bath room 8m...
To the sensor and back in the cement flooring is 4+4=8m
That alone makes 16 meters!
Then i go to the windows (each 2 reed switches and a glass breakage detector)...
I found one guy who uses the Loxone Smart Home Automation and has 1 ring
for each floor of his house. Every window, door, temp in every room and so on...
And Maxim writes about 100, 200, 500 meters - so it should not be a problem if you do it right.
But now i have S/FTP PiMF everywhere and its to late cause i thought its the best.
I use CAT6 for one wire and my light switches and CAT7 for Ethernet.
Try it in an environment as identical as possible to the final installation
How can somebody to that? How to replicate all the wires/electric in your house (walls, ceiling)?
Especially if you just start to build your house...
No Apple stuff in da house ]
I extra bought two books about EMC/EMI from VDE (VDE e.V. - Wikipedia)