In Wellington in 2026, a standard single-room heat pump typically costs between NZ$1,899 and NZ$4,860 including GST to supply and install. Multi-room and ducted systems sit much higher, commonly from about NZ$6,000 up to NZ$37,800 including GST. The exact price depends on the brand and size of the unit, how many indoor units you need, and how much site work your home requires. The biggest single factor is rarely the unit itself; it is the installation realities of your particular property.
How much does heat pump installation cost in Wellington?
A single high-wall heat pump installed in Wellington generally costs between NZ$1,899 and NZ$4,860 including GST in 2026. That covers a standard back-to-back install where the indoor and outdoor units sit on opposite sides of the same wall.
Local providers publish a range of starting prices. Quality Air in Wellington advertises small high-wall units installed from NZ$1,899 including GST, with further installed-from bands at NZ$1,999, NZ$2,399, NZ$2,799, NZ$3,199 and NZ$3,599 as you move up in capacity. Wellington price guides put a typical single indoor-unit install in the NZ$2,700 to NZ$4,860 including GST range once real-world site work is added.
Be careful comparing quotes, because some firms publish prices including GST while others quote plus GST. JMAC Electrical, for example, lists a standard installation from NZ$1,800 plus GST, which works out to roughly NZ$2,070 including GST once the 15% is added. Always confirm on each written quote whether GST is included before you compare.
Why do multi-room and ducted systems cost more?
Multi-room and ducted systems cost more because every additional indoor unit adds equipment, refrigerant piping, drainage and labour. A multi-split system with two to three indoor units commonly runs from about NZ$6,480 to NZ$12,960 including GST in Wellington. Ducted or whole-house systems, or installs with four or more units, typically range from around NZ$16,200 up to NZ$37,800 including GST.
The jump is not just about more hardware. Ducted systems route air through the ceiling cavity or under the floor, which means more design work, more materials and more time on site. The capacity also has to be sized for the whole home rather than a single room, and that sizing has to account for insulation, orientation and Wellington’s seasonal temperatures. A correctly sized system runs efficiently for years, while a guess can leave you with high running costs and uneven heating.
National guides confirm the pattern: medium systems sit around NZ$3,500 to NZ$5,000, and ducted or large systems start near NZ$7,000 and climb well past NZ$20,000 including GST depending on the home.
What does the installation price actually include?
A complete heat pump installation price should cover the unit, the indoor and outdoor mounting, refrigerant piping, electrical connection, commissioning and finishing work. When a quote looks unusually cheap, it is often because some of these items have been left out and will be charged later.
A realistic install includes mounting the indoor unit and drilling the wall penetration for the refrigerant lines, cable and drain; positioning and securing the outdoor condenser; running and flaring the refrigerant piping; making the electrical connection and earthing; then evacuating the lines, checking for leaks, charging the system and testing it. The job finishes with sealing wall openings, tidying trunking and a handover of the manuals and warranty.
Ask each installer to itemise the unit, the installation labour, any electrical upgrade, condensate drainage, wall penetrations and finish work. An itemised quote is the clearest signal that the firm has actually thought about your site rather than quoting a generic figure.
What makes Wellington heat pump installs different?
Wellington installs differ from most of the country because of wind exposure, hillside sites and older housing stock. These factors make outdoor unit placement and pipe runs more demanding, which is why local prices often sit toward the higher end of the national range.
Wellington’s wind means the outdoor unit still needs clear airflow but must avoid spots where it gets boxed in, weather-battered or where noise could carry to bedrooms or neighbours. Homes on slopes or tight urban sections can force longer pipe runs and more awkward external mounting, which turns a simple back-to-back job into a more customised one. Older Wellington homes frequently need extra electrical work or more tailored retrofits, particularly where insulation, roof cavity access or layout complicate the install.
There is also a performance angle specific to the local climate. Wellington buyers should look at how a unit heats at lower outdoor temperatures, not just the sticker price. The Energy Efficiency and Conservation Authority (EECA) stresses that good design and correct installation are fundamental to how well a heat pump performs, so a unit sized and sited for your home matters more here than almost anywhere else.
Do you need council consent for a heat pump in Wellington?
Most standard split-system heat pumps do not require a building consent, but the electrical work must always be certified by a licensed electrician. The rules sit across several authorities, so it pays to know which applies to your situation.
Building work that triggers consent is governed by the Building Act 2004 and the Building Code, administered by the Ministry of Business, Innovation and Employment (MBIE). Typical space-heating split systems usually fall outside building consent, though certain heat pump hot water installations can require one. Whichever applies, the electrical installation must be carried out by a licensed electrician who issues a Certificate of Compliance.
Outdoor unit siting can also bring in the Resource Management Act 1991 (RMA), where noise, visual effects or condensate discharge are involved. Wellington City Council is the local consenting authority and the place to confirm whether your planned placement breaches any district plan noise or visual rules. Separately, energy performance rules administered by MBIE and EECA set minimum standards for the units that can legally be supplied, with updated requirements taking effect from 1 May 2026, which affects which models are on the market.
How long does a heat pump installation take?
A standard single-room split system in Wellington usually takes 3 to 6 hours on the day of install. Multi-unit and ducted systems generally take 1 to 3 days, and complex jobs can stretch to four.
The process starts before install day with a site survey to confirm capacity, unit locations and any electrical upgrades. Once booked, wait times vary by season, from around a week in quieter months to roughly six weeks during the winter peak. On the day, the team clears access, mounts the indoor unit, drills the wall penetration, installs and connects the outdoor unit, then evacuates, charges and tests the system before finishing and handing over.
A straightforward back-to-back single split often takes 3 to 4 hours, while typical single-room installs are commonly quoted at 4 to 8 hours once finishing is included. Multi-splits with two to four indoor units usually run 1 to 2 days, and ducted or full-house systems take 1 to 3 days, with large or awkward homes occasionally extending to four.
What are the alternatives to a heat pump?
The main alternatives to a heat pump in Wellington are wood burners, gas heating, electric resistive heaters and electric hot water cylinders, sometimes paired with solar. Each has a different balance of upfront cost, running cost and suitability for the home.
Wood burners and wetbacks can be economical if you have access to cheap firewood, and they work well as backup or zone heating, but they need a chimney, ongoing maintenance and produce emissions. Gas heating can be cheaper to install in some cases, though supply and longer-term running considerations apply and uptake varies across Wellington. Electric resistive heaters and standard hot water cylinders are cheap to buy but usually cost more to run than a heat pump over time. Solar PV can lower running costs when paired with electric heating, subject to roof space and orientation.
Heat pumps are generally more efficient and cheaper to run than resistive electric heating, with the long-term savings depending on how much you use them and electricity prices. The other factor that affects every option is the building envelope: a well-insulated, draught-sealed home needs less heating capacity and runs cheaper, while poor insulation undermines even a correctly sized system.
How do you get an accurate quote and avoid overpaying?
The single most reliable way to get an accurate heat pump quote in Wellington is to request an on-site measure-up before accepting any price. Installation realities drive cost far more than the brochure figure, so a quote given without seeing the property is a guess.
Get at least three written, itemised quotes from Wellington installers. Ask each to confirm where the outdoor unit will sit, how it will handle wind exposure and whether noise could affect bedrooms or neighbours. Check that the quote includes electrical upgrades, condensate drainage, wall penetrations and finishing, not just the unit and basic labour. Confirm whether GST is included or added, since that alone can shift a comparison by 15%.
Look beyond the lowest number. Compare the heating performance rating and make sure the system is sized for your home rather than the room count, because an undersized or oversized unit costs more to run and heats less effectively through a Wellington winter. A good local quote will explain what is included, why the site is priced the way it is, and how the system suits your specific home. That transparency is usually the clearest sign you are dealing with an installer who will get the job right the first time.