I collected PDF brochures of BTO projects since 2010, downloading them from HDB website in my computer and uploaded on my website because HDB delete them after 3 years and many people are needing brochures of older projects, especially when applying via Sale of Balance Flats.
Build-To-Order was introduced in April 2001, currently new BTO flats are launched for sale in February, May, August, November. Future BTO locations are announced 6 months in advance, but exact day of launch is not known. This sable shows BTO names, town, launch date, estimated completion date, number of units breakdown by flat type, plus statistics such as average apartment size.
HDB InfoWeb Appliation Status page does provide the application rate for last BTO project and SBF, breakdown by flat type. I compiled an Excel table with a summary of application rate for every BTO and SBF launch from 2010 to present and offer it for free download together with HTML pages.
Have you ever wondered what were the HDB flat prices in the past, but have a hard time digging for prices around various news websites and forums? In 2016 I spent about 10 hours compiling selling price ranges of all BTO flats in one Excel database that you can download and compare flat prices by town, by flat type, etc. I update database with every BTO launch (usually every 3 months).