We self built 2005, small cu loan n saving, 154sq m, had site, approx 100k to move in..husband builder so did everything ourselves except 5 trades..windows, block, plaster, plumb, wire. Planning cost us 1k, no issues. Most around here say its cheaper now to buy than self build...
reg today have changed...few currently building im aware of....heating.ventilation system 24k, planning approx 8k as issues, need for engineers etc bit ott n all costly...
I know a couple who has costs drawn u professionally n he spot on, couple were way out....