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Bedroom extension #2

I am looking for a bedroom extension to be added on to my house. Present Construction is some form of brick (white) I am guessing it could be completed in block as I would like to have the whole house rendered. This would be a knock through from the existing bedroom I only require a shell, floor, walls roof and new ranch slider, all gib and electrics will be completed by my husband. Present floor is a concrete pad. The roof is flat, I have no plans or consent as yet wish to discuss with the right person, but pretty straight forward.