9 properties · Mayfield, Blenheim

Costello Avenue, Mayfield

Costello Avenue in Mayfield has 9 properties, valued by the council between $430,000 and $650,000 with a median of $460,000 (Mayfield: $530,000). Most of its homes were built in the 1950s. We estimate its homes at a median $460,000. 1 sold in the last twelve months.

$460kmedian council valuation
$460kour median estimate
1sold in the last 12 months
1950median year built
BlenheimMayfield ×Costello Avenue ×

9 properties on Costello Avenue, Mayfield

Highest and lowest on Costello Avenue

Highest-valued home5B Costello Avenue$650,000council valuation · 149 m² floor · 470 m² land
Lowest-valued home1 Costello Avenue$430,000council valuation · 3 bed · 90 m² floor
Highest sale, last 12 months6 Costello Avenue$495,000sold 28 Nov 2025 · 3 bed · 91 m² floor · 786 m² land

Property values on Costello Avenue

The council values Costello Avenue's 9 rated properties between $430,000 and $650,000. The middle half sit between about $451,000 and $466,000; the median is $460,000 and the mean $476,111.

Lowest: $430k$430kLowest10%: $430k20%: $445k20%30%: $457k40%: $460k40%Median: $460k60%: $460k60%70%: $463k80%: $469k80%90%: $510kHighest: $650k$650kHighest
BedroomsHomesMedian council valueSold, last 12 monthsMedian sale
38$460k1—

Council rating valuations: the council's figure for apportioning rates, not a market appraisal.

Costello Avenue compared with Mayfield

Costello Avenue's median council value is 13% below Mayfield's.

Costello AvenueMayfieldBlenheim
Median council value$460k$530k$630k
Sold in the last 12 months11.1%2.3%4%
Median section809 m²642 m²767 m²
Median year built195019601980
Council value per m² of floor$5k$4k$4k

Recent sales on Costello Avenue

The homes on Costello Avenue

Costello Avenue has 8 houses and 1 unit or townhouse. Most were built in the 1950s (89%).

1950s: 8 (8 homes)81950s2020s: 1 (1 home)12020s

Building and resource consents on Costello Avenue

2building consents in the last 5 years
2resource consents in the last 5 years
  • 6 Costello Avenue1 Mar 2026 · Building consentDwg add (ensuite) & alterations
  • 3 Costello Avenue1 Aug 2022 · Building consentFree-standing metro wee rad solid fuel heater
  • 5B Costello Avenue14 Oct 2021 · Resource consentTo authorise the existing dwelling on Lot 1 to breach therecession plane over the access way to proposed Lot 2.
  • 5A Costello Avenue14 Oct 2021 · Resource consentTo subdivide Lot 44 DP 2000 to create two allotments.

Sales and valuations as at 11 September 2026, from council and LINZ records. Medians resting on fewer than 3 sales are not shown.