Just to update. The property was demolished in Jan-16 and I applied to LPT for exemption for this year. The house was stripped in Jan-15, so there were no internal walls remaining / windows missing, it had no insulation, floor covering etc, and although it still had power connected to the property, it didn't have power to the individual rooms. I sent the information to the LPT providing supporting photos and proof of demolition and was granted an exemption until the property is rebuilt.