If you’re planning a home renovation in Southland, one of the first questions you’ll ask is:

“How much will it cost?”

The honest answer is: it depends.

Even two renovations that look similar can have very different costs. Factors such as the age of the home, its condition, plumbing and electrical work, structural changes, product choices, and hidden issues can all affect the final price.

At Bang Bang Building, we believe it’s better to have an honest budget discussion early rather than spend time designing a project that doesn’t fit your budget.

What Are You Actually Paying For?

Many people think renovation costs are mainly about building work, but there’s much more involved.

Depending on the project, costs may include:

• Building labour and materials
• Plumbing and drainage
• Electrical work
• Painting and decorating
• Tiling
• Flooring
• Windows and doors
• Joinery
• Demolition and rubbish removal
• Scaffolding
• Designers and engineers
• Council fees and inspections
• Specialist subcontractors
• Deliveries and site requirements

All of these moving parts need to be coordinated.

That’s where project management adds value. A professionally managed renovation keeps everything organised and running smoothly.

A Turnkey Renovation Means Less Stress

Bang Bang Building offers a fully managed renovation service.

Instead of organising different trades and trying to coordinate schedules yourself, we handle the process from start to finish.

We manage the trades, schedule the work, and oversee the project through to completion.

You’ll have one main point of contact, making the process much simpler and less stressful.

You’ll still make important decisions about your home, but managing the construction shouldn’t become a full-time job.

Why Can Two Bathrooms Cost Very Different Amounts?

Bathrooms are a great example of how renovation costs can vary.

Two bathrooms may be the same size but have completely different budgets.

One may keep existing plumbing, use standard fittings, and need minimal repairs.

Another may require plumbing changes, extensive tiling, underfloor heating, premium fittings, electrical upgrades, and structural repairs.

They’re both bathroom renovations, but they’re very different projects.

That’s why advertised renovation rates and square-metre pricing don’t always tell the full story.

Moving Things Usually Costs More

Changing a layout can transform a home, but it often increases costs.

For example:

• Moving plumbing may require drainage alterations.
• Removing walls may need engineering and structural support.
• Changing windows or doors can affect cladding, insulation, and interior finishes.

These changes aren’t necessarily a bad idea, but they should be considered when setting a budget.

Sometimes a small design adjustment can save thousands of dollars while achieving a very similar result.

That’s why involving your builder early can be valuable.

What’s Behind the Walls?

Renovations are different from new builds because there are often unknowns.

With older Southland homes especially, we don’t always know what’s hidden until work begins.

Common discoveries include:

• Rotten or damaged framing
• Previous alterations
• Outdated wiring
• Plumbing that needs upgrading
• Water damage
• Poor insulation
• Structural issues
• Materials requiring specialist removal

An experienced builder can identify many risks beforehand, but some issues only become visible once walls or floors are opened up.

That’s why a contingency allowance is important. We’ve explained more about how renovation contingency works, what can affect the amount you may want to allow, and why it’s important to discuss it before work begins.

Do I Need a Building Consent?

Some renovations require building consent, while others do not.

Structural changes, additions, and certain plumbing or building work may need approval.

It’s important to understand these requirements early, as they can affect both the timeline and budget.

Design fees, engineering, inspections, and council costs may also need to be included.

Your Product Choices Matter

The products you choose can make a big difference to the overall cost.

Examples include:

• Tapware
• Vanities
• Toilets
• Kitchen cabinetry
• Benchtops
• Flooring
• Lighting
• Hardware
• Tiles
• Appliances
• Windows and doors

There’s nothing wrong with choosing premium products, and there’s nothing wrong with selecting cost-effective options.

The key is understanding how those choices affect your budget.

A successful renovation isn’t about spending the most or the least.

It’s about achieving the best result for your available budget.

Start With the Budget, Not the Quote

We strongly believe every renovation should start with an honest budget discussion.

There’s little benefit in spending months designing a project only to discover it’s far beyond what you want to spend.

On the other hand, some homeowners assume a renovation will cost more than it actually does.

Talking with your builder early helps establish realistic expectations, identify major costs, and explore alternatives that may deliver a similar outcome.

So, What Does a Southland Renovation Really Cost?

The answer depends on your project.

Before discussing price, we need to understand:

• What is the current condition of the house?
• What changes do you want to make?
• What level of finish are you looking for?
• Are structural changes involved?
• What matters most to you?
• What budget are you comfortable investing?

Once we understand those factors, we can have a realistic conversation about whether the scope and budget align.

At Bang Bang Building, we’re focused on more than just construction.

We aim to deliver a well-managed renovation, coordinate the right people, and make the process as straightforward as possible.

Because renovating your home is already a big decision—you shouldn’t have to be the project manager as well.

Bang Bang Building

Focus on quality, not quantity.

Planning a renovation in Invercargill or wider Southland?

Get in touch with the Bang Bang Building team for an initial conversation about your project, ideas, and budget.