If he inherits the house and sells it immediately and it has not gone up in value there will be no Capital Gains Tax to pay. If it has gone up in value by �9,200 or less there will be no CGT to pay. All house sales are notified to the Revenue by the Land Registry immediately. Any Inheritance Tax will have been paid before he receives the house. A quick check with a local Independent Financial Advisor and or Accountant will not cost much, probably free for an initial consultation.