Thanks Luternau, re the VAT issue, will this apply to me given that this is a one off house build and not my normal line of work? I am still a PAYE worker.
The income tax is effectively killing my chances of being mortgage free, how can I avoid it or reduce the taxable earning? Could I rent out the house I want to sell for a year (pay income tax on that) and then sell as an investment property giving rise to a CGT hit rather than income tax or perhaps move into the house I want to sell for say a year, leave the other house unoccupied and then sell up and move into the unoccupied house. Would this be avoidance or evasion?