It seems likely that with dates and addresses in common with Valuation offices that there could be some connection.. especially as usually the address on baptisms would be where the family lived.
Richard Griffith was knighted, presumably in connection with his Valuation work, even before it was completed. He's shown in Thom's 1863 as :
Sir Richard Griffith bart., LL.D. chairman of the board of public works,
chief boundary surveyor under the Act 17 Vic c 17 and
commissioner of the Government valuations of Ireland
res. 2 Fitzwilliam place , office 2 Ely Place
just two Barr/Barre entries that year - the same details as 1848
Shane