Householders in Northern Ireland who have received the rateable valuations of their homes have been urged to check the estimation.
Northern Ireland's houses have been valued for rating
From April 2007 these valuations will be used to calculate domestic rates bills.
The last letters telling people what their homes are worth will land on doorsteps in the Dungannon, Larne, Moyle and Banbridge areas next week.
The SDLP's Tim Attwood said everyone should double-check their quotations.
Mr Attwood, who recently received his letter, said his home had been overvalued by £45,000.
"We recently received correspondence from the Valuation and Lands Agency stating that the valuation of our house, in Andersonstown in west Belfast, was £175,000. I thought this was over-valued," he said.
"I checked other houses in our area and established that the VLA had valued other similar properties at £130,000. When we contacted the VLA, they said it may have been a clerical error and agreed to send someone out to re-assess the property."
Anyone who wants to check the value of their home can do so by logging onto the Valuation and Lands Agency's website at www.mycapitalvalueni.gov.uk.