I can fully recommend Stteven's accommodation! It was a great experience to stay at his house. It's located in a quiet area with two MRT stations (Serangoon or Woodleigh) in ~ 10mins distance. The Serangoon station is within a huge shopping center with a big supermarket and lots of shops! Stteven, who is living in the house, let's you have full privacy if you want but was at the same time always helpful if I had a question :-)
The room is really clean and I even had a full water container in my room prepared for me. The air-con works perfectly and there was a fan, too.
Towels and shower gel is also free to use.
One of the best things about my stay was Sttevens flexibility!! My plane arrived early in Singapore and I could check-in during the morning hours which was absolutely great!
Would totally stay again at his house while in Singapore!!