Whanganui's older housing stock has significant uninsulated properties — the heritage homes that make the city beautiful can also be cold and draughty. Ceiling and underfloor insulation upgrades are among the most cost-effective improvements for Whanganui homeowners. Here's what insulation costs in Whanganui in 2026.
Whanganui Insulation Costs 2026
| Service | Whanganui typical cost |
|---|---|
| Ceiling insulation (full house, 3-bed) | $2,000–$5,000 |
| Underfloor insulation (full house, 3-bed) | $1,350–$3,500 |
| Ceiling insulation (per m²) | $17–$46/m² |
| Underfloor insulation — batts (per m²) | $11–$30/m² |
| Underfloor insulation — foil (per m²) | $7–$20/m² |
| Wall insulation — retrofit (per m²) | $42–$105/m² |
All prices GST inclusive. Broadly regional.
Whanganui Insulation Market
Whanganui's older housing stock has significant uninsulated properties — the heritage homes that make the city beautiful can also be cold and draughty. Ceiling and underfloor insulation upgrades are among the most cost-effective improvements for Whanganui homeowners.
Warmer Kiwi Homes Grants
You may qualify for a government subsidy covering up to 80% of insulation costs (90% for Community Services Card holders) if: - You own and live in your home - Your home was built before 2008
Approved Whanganui installers can check your eligibility and manage the grant application. Check eligibility at energywise.govt.nz
Find Whanganui insulation installers: Insulation Installers Whanganui | Post a Job Free
Related: Insulation Cost NZ | Heat Pump Installers Whanganui