How Much Does a House Renovation Cost in Wellington in 2026?

The cost of renovating a house in Wellington depends on the size and condition of the property, the type of renovation, materials, design and the overall scope of work.

A small renovation, such as updating a bathroom or kitchen, will have a very different cost from a full house renovation involving structural changes, an extension or recladding.

Wellington homes can also present additional considerations, particularly older properties. Weather-tightness, insulation, structural repairs, access and existing building conditions can all affect the final cost.

The best way to understand your house renovation costs in Wellington is to have your property and renovation requirements assessed by an experienced building professional.

How Much Does It Cost to Renovate a House in Wellington?

There is no fixed price for a Wellington house renovation. Every property is different, and the final cost depends on the work required.

What Affects Wellington Renovation Costs? 

• Size and scope of the renovation

• Existing condition of the property

• Structural alterations

• Kitchen and bathroom upgrades

• Plumbing and electrical work

• Windows and doors

• Insulation and energy efficiency

• Cladding and weather-tightness

• Materials and finishes

• Design and architectural requirements

• Building consent requirements

• Site access and complexity

Renovating an Older Wellington Home

Older homes may require additional work before or during renovation. This can include structural repairs, insulation, roofing, window upgrades, plumbing, electrical work and weather-tightness improvements.

Identifying these requirements early can help create a more realistic renovation budget.

Average House Renovation Cost Wellington NZ

When researching the average house renovation cost Wellington NZ, it's important to remember that averages can be misleading. A minor renovation may involve painting, flooring and small repairs, while a full renovation could include structural work, new kitchens and bathrooms, windows, roofing and recladding.

Rather than relying on one average figure, your budget should be based on the specific work your home requires.

Cosmetic or Minor Home Renovation may include:

• Painting and decorating

• Flooring

• Minor repairs

• Fixtures and fittings

• Small room upgrades

Mid-Range House Renovation may include:

• Structural alterations

• Floor plan changes

• Kitchen and bathroom renovations

• New windows

• Recladding

• Roofing

• Extensive interior work

Full House Renovation may include:

• Structural alterations

• Floor plan changes

• Kitchen and bathroom renovations

• New windows

• Recladding

• Roofing

• Extensive interior work

Wellington Home Renovation Cost Per Square Metre

Using a Wellington home renovation cost per square metre can be useful when creating an initial budget. However, a $/m² figure should only be used as a guide.

Two homes with the same floor area can have very different renovation costs depending on their condition, design and the work required.

What Is Included in a Renovation Cost Per Square Metre?

Depending on the project, costs may include:

• Building work

• Labour

• Materials

• Fixtures and finishes

• Plumbing

• Electrical work

• Project management

Why Renovation Cost Per Square Metre Can Vary

The renovation cost per square metre NZ homeowners see can vary due to:

• Existing property condition

• Structural work

• Material choices

• Site access

• Design requirements

• Consents

• Specialist trades

For an accurate figure, a project-specific assessment is more useful than relying solely on a square-metre rate.

House Renovation Costs Wellington NZ 2026: What Should You Budget For?

If you're researching house renovation costs Wellington NZ 2026, consider the individual areas of your renovation.

Kitchen Renovation Costs

Kitchen costs can depend on the size of the kitchen, cabinetry, benchtops, appliances, plumbing, electrical work, flooring and lighting.

A simple kitchen refresh will have a different budget from a complete kitchen redesign.

Bathroom Renovation Costs

Bathroom renovations can involve waterproofing, tiling, plumbing, fixtures, vanities, storage, showers, baths and ventilation.

House Extension Costs

An extension can include additional bedrooms, larger living areas or a new section of the home. Costs may include foundations, structural work, roofing, windows, doors, plumbing, electrical work and interior finishing.

House Recladding Costs

Recladding may involve removing the existing cladding, repairing underlying areas, installing new cladding and addressing weather-tightness. Insulation, flashings, windows and doors may also form part of the project.

Roofing and Exterior Renovation Costs

Exterior work can include roof repairs or replacement, gutters, exterior repairs, decks, fences, gates and exterior painting.

What Is Included in a House Renovation Quote?

When comparing renovation quotes, look beyond the final price and check what is included.

Building Labour and Materials

A renovation quote may include builder's labour, building materials, fixtures, finishes, preparation and installation.

Design and Project Management

Depending on your project, costs may also include design, planning, project management, trade coordination and construction.

Consents and Professional Fees

Some projects may require building consent, architectural services, engineering or specialist reports. These requirements depend on the scope of the renovation.

What Can Increase the Cost of a Wellington House Renovation?

Unexpected issues can sometimes arise when renovating an existing home.

Structural Problems and Unexpected Repairs

Hidden issues such as rot, moisture damage, structural problems or deteriorated materials can add to the project cost.

Changes During Construction

Changing layouts, materials, fixtures or finishes after construction has started can increase both costs and project time.

Planning key details before construction begins can help minimise unnecessary changes.

Premium Materials and Finishes

Custom cabinetry, premium appliances, high-end bathroom fixtures, specialty flooring and custom joinery can all increase the overall budget.

How to Keep Your Wellington Renovation Within Budget

A clear plan can help you manage your renovation budget.

Set Your Renovation Priorities

Separate your project into essential repairs, important improvements and optional upgrades. This makes it easier to allocate your budget where it matters most.

Choose Materials Before Construction Starts

Selecting key materials and finishes early can make budgeting easier and reduce changes during construction.

Allow a Contingency for Unexpected Costs

Renovations can uncover issues that weren't visible beforehand. Allowing some contingency in your budget can help cover unexpected work.

Work With an Experienced Wellington Renovation Builder

An experienced Wellington renovation builder can help with planning, pricing, trade coordination, project management and construction.

Why Choose Insitu for Your Wellington House Renovation?

Insitu Building Co. Ltd provides a range of building and renovation services for homeowners planning a Wellington house renovation.

Complete Renovation Services

• Kitchen Renovations

• Bathroom Renovations

• House Extensions

• Interior Renovations

• House Recladding

• Roofing

• Window Upgrades

• Fences, Decks, and Gates

• General Maintenance

Design and Project Management

From initial planning and design through to construction, Insitu can help coordinate the different stages and trades involved in your renovation.

Experienced Building Team

We focus on practical planning, quality workmanship and clear communication to help bring your renovation project together from start to finish.

Frequently Asked Questions About Wellington Renovation Costs

How much does a house renovation cost in Wellington?

The cost varies depending on the property's size, condition, materials and scope of work. A minor renovation will cost considerably less than a full house renovation involving structural changes or an extension.

What is the Wellington home renovation cost per square metre?

A square-metre rate can help with initial budgeting, but it shouldn't be treated as a final price because renovation projects vary significantly in complexity.

Are house renovation costs in Wellington higher for older homes? 

Older homes may require additional repairs or upgrades, including work to insulation, roofing, windows, plumbing, electrical systems, structure or weather-tightness.

How much should I budget for a kitchen renovation in Wellington?

Kitchen renovation costs depend on the size, layout, cabinetry, benchtops, appliances, plumbing, electrical work and finishes.

How much does a bathroom renovation cost in Wellington?

Bathroom renovation costs depend on the size of the space and the fixtures, finishes, plumbing, waterproofing, tiling and other work required.

Let's Plan Your Wellington Renovation

Knowing how much a house renovation costs in Wellington is an important first step, but every home and renovation project is different. The next step is understanding what your property needs and what can realistically be achieved within your budget.

Whether you're planning a kitchen or bathroom renovation, extending your home, improving its exterior or tackling a larger renovation, the Insitu Building Co. Ltd team can help you plan and manage the work.

As a family-owned building company, we take a practical, hands-on approach to each project, with a focus on clear communication, quality workmanship and bringing the different parts of your renovation together. 

Thinking about renovating your home?

Talk to the Insitu team about your project and arrange a free in-home consultation.