We are a family business of myself and my son. I am a carpenter who has been in building work for over 35 years. My son is also a carpenter. We specialise in extensions, conversions, ground works, paving, landscape and new builds.
Right at the beginning. an experienced builder would be able to see things like drainage, building over or party wall problems that may not be apparent. would also be able to give a budget price based on your ideas and vision of the extension.
A carpenter. or one experienced in fencing/gates.
Plasterer or builder experienced in dry lining, first fix carpentry. important to have joists/fixings/bearings at 400mm centres to eliminate waste of plasterboard.
A lot of varying factors like access, existing single storey or higher but allow 10 weeks if access etc not too onerous.