A full house renovation in Wellington typically costs around $265,000 to $305,000 including GST in 2026, though real projects range from about $80,000 for a cosmetic refresh to well over $600,000 for a large character-home transformation. The single biggest driver of that number is scope: how much you change the structure, services and layout rather than just the finishes. Wellington sits slightly above the national average because of its hilly sites, older housing stock and wind and seismic design needs. This guide breaks down the price bands, the consent rules, the timeline and the practical decisions that shape your final figure.
What does a full house renovation cost in NZ in 2026?
A full house renovation in New Zealand in 2026 usually falls into three bands: roughly $80,000 to $150,000 including GST for a cosmetic refresh, $180,000 to $300,000 including GST for a fuller mid-range renovation, and $350,000 to $600,000 or more including GST for structural, high-spec or character-home work. The mid-range band is where most whole-home projects land once new kitchens, bathrooms and some layout changes are involved.
Published NZ cost guides put Wellington at an indicative $265,000 for a typical full-house renovation, next to about $288,000 for Auckland and $245,000 for Christchurch. Real project figures show how much scope moves the number: a small 40 square metre renovation came in around $71,000 including GST, an average 100 square metre project around $110,000, a 50 square metre layout-change renovation around $175,000, and a 96 square metre major structural renovation around $323,000.
One important caution when comparing figures: many NZ guides quote prices excluding GST unless they say otherwise. New Zealand GST is 15 percent, so a headline figure of $265,000 excluding GST becomes about $304,750 once GST is added. Before you compare two builders, confirm whether each quote is GST-inclusive, because a like-for-like comparison is impossible otherwise. When you plan your own budget, use the mid-range band plus contingency as your safest starting point rather than the cheapest number you find.
Why does a Wellington full house renovation cost more than the national average?
Wellington full house renovations usually cost a little more than the national baseline because of four local factors: steep sections, older housing stock, wind and seismic design, and council rules that are more likely to affect real projects. On one NZ cost guide a typical Wellington whole-home renovation is around $265,000 including GST, versus roughly $225,000 across regional New Zealand overall.
The terrain is the most visible difference. Wellington has steep sites, narrow streets and harder access, which means trades need more time for parking, loading, skips and deliveries. Local cost guidance suggests difficult access can add up to 30 percent compared with a flat, drive-on section. That turns logistics into a genuine budget line rather than a rounding error.
The housing stock adds a second premium. Villas and bungalows are common across the city, so hidden rot, borer and outdated wiring and plumbing are a bigger risk than in newer suburbs elsewhere. Many older Wellington homes also sit below modern insulation and heating standards, so double glazing, insulation upgrades and heating are frequently part of the scope even when they are not strictly required.
The third factor is exposure. Wind zones and coastal salt spray mean roofing, cladding and fixings may need engineering attention, and seismic requirements push some projects toward stronger structure and more detailed design. The practical upshot is that in Wellington the cheapest-looking quote can be misleading if it leaves out access, wind and seismic design, insulation upgrades and consent costs.
What is included in a full house renovation budget?
A full house renovation budget should be split into five parts: the build cost, design and engineering, consent fees, site access and logistics, and a hidden-damage contingency. Breaking it up this way fits Wellington far better than a single per-square-metre figure, because the site can change the price as much as the finish level does.
The build cost is the largest slice and covers demolition, framing, linings, joinery, tiling, painting, flooring and fixtures. Design and engineering covers your plans, any structural engineering for layout changes or seismic strengthening, and specialist input for difficult sites. Consent fees cover building consent and, where needed, resource consent, along with inspections through the build.
Site access and logistics is the line most homeowners forget. On a steep Wellington section this can include scaffolding, craneage, extra labour time and off-site parking, and it is exactly where the up-to-30-percent terrain premium shows up. The hidden-damage contingency, usually 15 to 25 percent of the build cost for an older home, absorbs the surprises found once walls and floors are opened up.
As a worked example, take a $250,000 including GST mid-range renovation of a 1920s bungalow. You might allocate roughly $175,000 to the build, $20,000 to design and engineering, $8,000 to consents, $15,000 to access and logistics, and around $40,000 as contingency. Those proportions shift with every home, but the discipline of naming each category up front is what stops a project drifting over budget.
How much do kitchens and bathrooms add to a renovation cost?
Kitchens and bathrooms almost always dominate a full house renovation budget, and they often decide whether a project stays a renovation or tips toward a rebuild. In 2026 NZ figures put a new kitchen around $25,000 to $75,000 including GST and a bathroom around $36,000 to $65,000 including GST, before any wider whole-house work is added on top.
The wide spread comes from material and fixture choices. A functional kitchen with laminate benchtops, mid-range appliances and standard cabinetry sits at the lower end, while stone benchtops, custom joinery and premium appliances push toward the top. Bathrooms swing on tiling, tapware, underfloor heating and whether you move plumbing, which is where costs climb fastest because relocating pipes and waste is labour-intensive.
In a full renovation you are often building two or more of these rooms at once, so it is realistic for kitchen and bathroom work alone to account for a third or more of the total budget. That is why fixing your finishes early matters so much. Every provisional sum you leave open, meaning a rough allowance rather than a firm price, is a place the final number can drift upward.
A practical step is to choose your kitchen layout, benchtop material and appliance level before signing a contract, then do the same for each bathroom. The more decisions you lock in before the build starts, the closer the fixed price will be to what you actually pay, and the fewer change orders you face mid-project.
Do I need building consent or resource consent for a full house renovation in Wellington?
Most full house renovations in Wellington need building consent, and some also need resource consent. Wellington City Council requires building consent for work that affects a building’s structure and for plumbing or drainage work other than simple repairs. A full renovation that moves walls, rewires or replumbs will almost always cross that line.
Building consent rules sit under the Building Act 2004, with MBIE providing national guidance. Schedule 1 of the Building Act 2004 lists building work that is exempt from consent, covering some general alterations, maintenance and replacement, so minor work may not need consent. For alterations to an existing building, section 112 of the Building Act 2004 is the key rule: the altered building must not end up less compliant than before, and fire-escape and, where required, accessibility upgrades may apply.
Resource consent is separate and comes from the district planning system under the Resource Management Act 1991, applied locally through Wellington’s District Plan. Wellington City Council says you need resource consent for building work that does not comply with the District Plan, covering matters such as boundary setbacks, height, parking and site access. Crucially, a renovation can be exempt from building consent yet still need resource consent, and the council advises getting resource consent before other consents or permissions.
A useful rule of thumb: if you are changing structure, services or the building shell, expect building consent; if you are changing how the site or building fits the District Plan, expect resource consent. On a tight or steep Wellington site, check setbacks, access and any road-reserve encroachments early, because these can force design changes before your plans are final.
How long does a full house renovation take in Wellington?
A full house renovation in Wellington usually takes 3 to 9 months of construction, and longer for large structural jobs. On top of that you need earlier time for design, consent processing and material ordering, so the realistic end-to-end timeline is often several months to well over half a year from first plans to handover.
The sequence tends to run in a predictable order. First you define scope and budget, deciding what stays and what changes. Then design and planning locks in layouts, materials and finishes. Consents and approvals follow, and this stage can add several weeks to a few months depending on council workload and how complex the job is. Pre-construction setup confirms start dates, orders materials and lines up trades.
On site, the build moves through demolition and strip-out, then structural and services work such as framing, plumbing and electrical, then linings, fit-off and finishes including gib, cabinetry, tiling, painting and flooring. It ends with final inspection, defect fixing and handover.
The biggest variables are consent timing, custom material lead times and how much structural or layout work is involved. A renovation that moves walls, rewires, replumbs and reconfigures multiple rooms will sit toward the longer end of the range. To keep a whole-house job on track, active project management matters: sequencing trades, ordering long-lead items early, and holding regular site meetings so decisions do not stall the programme.
What hidden costs should I budget for in an older Wellington home?
The main hidden costs in an older Wellington home are rot, borer, asbestos, outdated wiring and plumbing, and insulation or heating upgrades that only become visible once work starts. NZ cost guidance suggests a 15 to 25 percent contingency for age and condition, and character homes sit at the top of that range. This buffer is not optional on a villa or bungalow; it is core to the budget.
Rot and borer are the classic surprises. Once cladding, linings or subfloors come off, decayed framing or borer-affected timber often needs replacing, and the extent is impossible to price precisely in advance. Older wiring and plumbing frequently fall short of current standards, so a renovation becomes the practical moment to bring them up to scratch, which adds cost but avoids doing it twice.
Wellington adds its own layer. Many older homes need insulation upgrades and double glazing to reach a comfortable, healthy standard, and heating often needs attention at the same time. Wind and seismic exposure can mean stronger fixings, engineered connections and more robust cladding detailing than a flatter, sheltered site would require.
The way to manage this is to keep the contingency as a real, ring-fenced line rather than money you quietly spend on nicer finishes. A pre-renovation inspection can reduce the unknowns by flagging obvious rot, dampness or structural issues before you commit, but it will not catch everything hidden behind linings. Treat contingency as expected spending on an old home, not a rainy-day fund.
Should I renovate, do it in stages, or rebuild instead?
The main alternatives to a full renovation are a lighter cosmetic refresh, a staged room-by-room approach, or a knockdown-rebuild, and the right choice depends on budget, scope, consent complexity, hidden-condition risk and how long you plan to stay. A useful method is to compare three options side by side: light refresh, full renovation and rebuild, and for each estimate total cost, consent burden, time off-site and the home you would own at the end.
A cosmetic refresh at $80,000 to $150,000 including GST suits a home that works structurally but looks dated: paint, flooring, lighting and minor fixtures with low disruption. Staging spreads a full renovation across months or years, letting you fund it in chunks and keep living in the house, at the cost of a longer overall timeline and some duplicated setup between phases.
A full renovation makes sense when the structure is sound and the layout mostly works but needs new kitchens, bathrooms, finishes and some reconfiguration. A rebuild moves into consideration when the home needs major structural or compliance work, when the layout no longer suits modern living, or when hidden-condition risk is simply too high to price with confidence.
End use is the tie-breaker many people underweight. If you plan to stay long term, spending on structure, insulation and layout pays off in daily comfort. If you expect to sell soon, functional upgrades usually return more than premium finishes. Get rough numbers for all three paths before you commit, because the cheapest option today is not always the one that leaves you with the home you actually want.
How can I keep a full house renovation on budget?
The most reliable way to keep a full house renovation on budget is to fix your scope and finishes before signing, prefer a fixed-price contract, and hold a real contingency separate from the build price. Cost blowouts almost always come from decisions left open, from provisional sums that get resolved upward, and from surprises in older homes that had no buffer set aside.
Start by making your scope clear on paper: what changes, what stays, and what the finished home looks like. Choose your major finishes early, especially kitchen and bathroom materials, because these carry the largest provisional sums. Every allowance you convert into a firm price before the build starts is one less place the number can move.
A fixed-price contract shifts pricing risk to the builder for the defined scope, which is usually preferable to a charge-up arrangement for a whole-house job. It only works if the scope is genuinely complete, so invest the time in detailed plans and specifications up front. Where uncertainty remains, agree in writing how variations will be priced and approved, so a mid-project change does not become an open cheque.
Finally, keep your contingency visible and disciplined. On a Wellington character home, 15 to 25 percent on top of the build cost is realistic, and it should stay reserved for genuine surprises rather than upgrades. Regular site meetings and a simple running budget, updated as decisions are made, let you catch drift early while there is still room to adjust.
How do I choose a builder for a full house renovation in Wellington?
Choose a builder for a Wellington full house renovation on three things: relevant local experience, Licensed Building Practitioner status, and a clear, itemised quote you can actually compare. Whole-house work on steep or older Wellington sites is complex, so a builder who has managed similar jobs in the region is worth more than the lowest headline price.
Licensed Building Practitioner status matters because restricted building work, which includes structural and weathertightness work, must be carried out or supervised by an LBP. Ask directly about the practitioner leading your project and their track record with second-storey additions, layout changes and weathertightness remediation, since these are exactly the areas where Wellington homes tend to need work.
When you compare quotes, look past the total. Check that each quote covers the same scope, states clearly whether it is GST-inclusive, and breaks out consents, access and contingency rather than burying them. A slightly higher quote that names these items honestly is usually safer than a lower one that leaves them out and surprises you later.
Local project management is the final test. Whole-house renovations stay on time and on budget when someone actively sequences trades, orders long-lead materials early and communicates through the build. Bear Construction is an independent Wellington renovation and extension builder led by Licensed Building Practitioner Phil Ashton, with over 20 years of experience across second-storey additions, full-home renovations and weathertightness remediation in the Wellington region. Whoever you choose, prioritise clear communication, honest allowances and genuine local experience over the cheapest number on the page.