To be honest, I don’t know tho I would like to know. 😛 Since I started trawling for info about EMs, I think I’ve collected more than 10 different layouts/floor plans.
This design should be the 1st EM design in Singapore. Many owners built a roof on top of the balcony. And this design originally does not come with a toilet at the lower floor, just a wash area.
This design should be around 20 year old now which I think is the best EM design in terms of space arrangement, esp I like the big balcony which can put at least 2 mahjong tables.
This the smallest and last batch of EM w/o the individual rubbish chute which I’m staying now.
There are many variations in layout of course. E.g. Corner units, ground floor units and with/without rubbish chutes. I’ve also seen EMs with ‘triangular’ layouts, extra balconies & more windows in the master bedroom (for 2nd Gen EMs, the windows may extend all the way across the wall that connects to the void space at the balcony). There are also those penthouse maisonettes (Choa Chu Kang, Strathmore, Bishan & Sin Ming) with extra large floor areas and/or lofts, and older 5 room HDBs with maisonette layout.
I’ll share those maisonette floor plans that I’ve already collated some other time. If you have an interesting layout, do let me know k?