IHTM10060 | Investigating the assets on page 6: Deceased’s residence (box 51)
From HM Revenue & Customs · Inheritance Tax Manual
The value of the deceased’s home should be included in box 51 of the IHT400. This box should also be used for the deceased’s former home where
the deceased had moved into a nursing or other residential home shortly before death, and
the former home was still vacant.
If the deceased lived on a farm the value of the farmhouse should be included in box 68.
Details of the property included in this box should be found at box 7 on Form IHT405
If the deceased’s main residence was jointly owned the value of the deceased’s share will be included in box 49 of the IHT400, and also on form IHT404