2 Storey Extension on 2 Bed Terrace Cost Ideas

[JustinScot]

hi,

I currently live in a 2 bed terrace and I love the area l live in, my kid just started school so I dont want to move. I am currently renting and would like to buy. But the area I live in has mainly 2 bed terraces.

The bigger bungalows are expensive and way out of my price range.
Can anyone give me an idea of what it would cost to do a 2 storey extension on a 2 bed terrace.
From

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to

before.jpg (42 KiB) Viewed 522 times

3.5x7m extension with one simple bathroom and minimal finishes as I can do the interior painting and flooring.

Also the current footprint is about 40m2, what size land do i need to be allowed to extend the footprint to 65m2?

Location Glasgow