Hi
@Ahmed12 Normally if you get the build right it's more financially beneficial to sell after the development phase.
If you sell just the site the incoming buyer will want to make some profit as well from carrying out the development themselves (and taking that risk) so you'll have to bear that in mind.
That being said it's often nice to turn land sites around quickly without the hassle of developing them out as you can free up cashflow and go on and make your money on another land site...
It also depends on your experience... if you have construction experience or not and what you enjoy doing all form part of your decision as to which type of property deals you like to get involved with...