The barn is 740m from the nearest supply,I bought 54 acres next door to get electric.
There’s only Hv on the land so I have to pay for the transformer anyway,this will be 3 ph because they won’t do a single ph supply off Hv,the transformer connection to a cubicle (sited 15m from the pole,minimum distance allowed)to house the meter will cost circa £15/16k,it will all be tax deductible while it’s an agricultural barn.
My thinking is houses don’t use as much energy as they did,better insulation,led lights etc,it will be a 5 bed large house so not small but if you heat your water using oil or a gas combi boiler there’s only the cooker and a couple of electric showers using the main power.