I asked them 5 days (21 July 2016) before I collected my keys via email, on the day (25 July 2016) of collecting the keys via form and 1 day (26 July 2016) after key collection as a followup of the email sent earlier. Below is their reply via email on the 28 July 2016,
She sent me a form (see enclosed) to fill up as well. Just get prepared and submit them back as soon as possible. If you have not purchased any number lock, just give them any random number first as the number on the number lock can be re-set to any number. I sent them back on the 29 Jul 2016 and the next thing you know is that the SFR contractor called.
I had to bring forward my SFR due to the Defective Check delay and National Holiday. The SFR contractor HDB engaged came last week to do some measurements (checked the floor height without cement screed against the Kitchen flooring). He told me there was a difference of 60 - 70mm difference in each room. Therefore, I need to top up those differences for it to be leveled with the kitchen flooring. When I asked him how much do I have to pay for his extra services, he quoted me SGD 700.00 for a 4-rm BTO flat. Just be careful with these guys and double check their measurements especially the "leveling" equipment that they are using. By right, there should only be a 50mm difference. HDB has already pasted a sticker with measurement to mark the height on each door. You can use that to your advantage. Anyways, I have requested for them to do another measurement before work starts.
Tomorrow (11 Aug 2016) they will start work and I will update again. So it depends on how fast you react to their request. Mine took 18 days from the day I collected the keys up till the day they start with the SFR.
PS: Applied HDB on 31 Jul 2012.
