Bydd pobl sy'n prynu tai sy’n werth mwy na £345,000 yn gweld cynnydd o hyd at £550 – ond dim ond i tua 15% o drafodiadau eiddo yng Nghymru y mae hyn yn berthnasol.
People buying homes worth more than £345,000 will see an increase – up to £550 – but these only represent around 15% of property transactions in Wales.