Caerphilly – Ceremonies at Penallta House www.caerphilly.gov.uk/Services/Births,-marriages…/Ceremonies-at-Penallta-House Ceremonies at Penallta House. We have two rooms at Penallta House where we can perform marriages or civil partnerships, Craig Penallta and the Statutory Register Office. Craig Penallta. The room will comfortably seat a maximum of 70 guests but is equally suitable for a much smaller group. It is located on the ground ..