Social agencies worry as Trade Me says median figure now $420.
Residential rents have risen by 6.3 per cent in the year to April to a record-equalling median of $420 a week, a report says.
Head of Trade Me Property Nigel Jeffries said the rise equated to tenants paying $25 more a week in April 2015 than they did a year ago, or $1300 a year.
"Across the country, the rental market consistently delivered median rental growth north of 7 per cent year-on-year in 2015, accelerating on growth of about 5 per cent over the same period last year."
He said it was too early to assess the impact of the recent property and tax changes announced by the Government.