My relatives have worked with the contractor before and he is very reliable but I am wondering if the quotation he gave me is on the higher side or is it just standard.

I went to my relative's house to view his work and the workmanship looks quite good.

cant comment on the aluminum bits; but my breakdown on the other stuffs are as follows:
1. RM22psf for tiling works is quite expensive. Usually RM5.50psf for workmanship; RM3psf for the materials (cement, adhesive materials, etc). Tiles pricing is heavily dependent on your tile of choice.
2. RM7psf for plaster ceiling (i assume) is not cheap. Market price for >1000sqft is in the region of RM2.50 to RM3psf.
3. RM30psf for awning is on the high-side; especially if the awning does not come with sound-deadening. Normal uninsulated awning should be in the region of RM18psf. Insulated ones will be in the region of RM25psf.

This is based off renovation price estimates from a recent quote I have gotten late 2020.

The awning is the sound-deadening and insulated type and the ceiling is for the extended kitchen. Right now the kitchen is just using normal roof and there is no ceiling so the kitchen gets extremely hot.

I'm not sure if normal ceiling is different from plaster ceiling.

my opinion- way too expensive

do you have any contractors you can recommend for klang?

Wow, yours is bungalow? Haha. If not how come quite high price? i found mine labour to installation not include tiles for my new condo is RM10/square feet. Even hacking existing tiles also is around RM5/square feet. Some more this is include moving material and debris. My boss office do new 2x4 ceiling also around Rm6/square feet only which work for night time. I really quite shock with your contractor price. Some more deposit taken for 50%????