Guys need your help here..

Just bought my first house at Wangsa Maju Sec 6 (Dbl Sty 20x75).. So before i move in i'm planning to do some renovation on the house.. Basically on the front area only.. Need your advice on how much do i need to budget to this sort of reno..

my plan is:

1. Demolish old gate (i think around 12 ft wide) & brick
2. Built wider entrance gate (btween 16 -17 ft) with post box
3. Autogate + wiring
4. 16-17ft gate (don wan stainless steel or WI. a cheap one would do coz i don mind repainting the gate every year)
5. Tiling for existing lawn area next to the parking area (i thin its about 8 X 15)
6. Built a balcony without roof/ on existing car porch 20 ft wide (existing car porch only roof)
7. Built car porch on the existing open area in front of the balcony (say around 20 x 12)
8. Built door to enter balcony

And by the way.. usually how long does it take for DBKL approval (plan & reno) before the contractor can actually start to work?

Hope you guys can give some idea or just a rough figure..

TQVM