Property tax reassessment work is about to start up again in Dorchester County, after a year's delay as staff dealt with a new computer-assisted mass appraisal system.

The replacement system is being installed now, Tax Assessor Wayne Welch told County Council this week. New assessments will be completed in time for the 2015 fiscal year.

The delay won't affect the five-year reassessment cycle; the next reassessment will be in four years, he said.

The last reassessment was completed in 2009, as property values crashed in the recession; those values are now recovering. How reassessment would affect individual tax bills depends on how fast the individual property value rose in relation to others in the county.

And counties are required to lower their tax rates when reassessments increase the tax base, so if every property increased in value by the same amount, no one's tax bill should rise.

The county delayed the reassessment as the system first was installed to replace an earlier system.

Editor's note: An earlier version of this story contained information that Tax Assessor Wayne Welch disputed as inaccurate.