5 Things Smart Homeowners Do When Planning a Renovation - MJones Building

Renovating your home is one of the most exciting — and sometimes stressful — decisions you'll ever make. Whether you're finally ripping out that dated kitchen, adding a deck, or turning a cramped bathroom into a more usable space, the planning stage is essential. Get it right, and the whole project flows seamlessly. Rush it, and you'll spend more time (and money) fixing mistakes than enjoying the results.

They Know What They Want and Why

It may sound obvious, but you'd be surprised how many people start a renovation with a vague idea and no clear outcome. "I just want it to feel more modern," or "I want more space," are starting points, not briefs. Before you call a builder or request a quote, spend time getting specific with the scope of work to be completed.

Ask Yourself

What problem is this renovation solving?
How do I want to feel in this space every day?
Will this add long-term value to my home, or is it purely lifestyle-driven?
What's my non-negotiable list versus my nice-to-have list?

Having a clear vision doesn't mean you need to have every tile picked out before you speak to anyone. It means you know your priorities. This clarity saves time during design, reduces back-and-forth with your builder, and helps avoid costly mid-project changes that may blow out your budget.

Pro Tip Create a simple document or folder with photos, measurements, and notes about what's working and what isn't in your current space. Bring it to your first meeting with your builder, draftsman or architect. It sets the tone for the whole project.

They Have Allowed a Buffer in the Budget

Every renovation has a number on paper and a number in reality. The gap between those two figures is where most homeowners get caught out. Surprise costs aren't bad luck; they're a predictable part of the process, especially in older New Zealand homes. The smart move isn't to hope they don't happen. It's to build a budget that can absorb them without derailing the whole project.

Open a wall in a pre-1990s home, and you might find non-compliant wiring. Pull up a bathroom floor and discover moisture damage underneath. Start on the plumbing, and learn that it doesn't meet current code. None of this is unusual. While a fixed price quote can help mitigate against some of the likely surprises, there is always the chance of unforeseeable conditions that may fall outside scoped works.

Renovation budgeting and planning — MJones Building

Thorough planning and realistic budgeting are the foundation of every successful renovation.

Here's how to build a buffer into your budget before you start:

Set your real budget, then add 15–20% on top. That buffer isn't extra spending money; it's your financial shock absorber. Don't touch it unless you need it.
Ask your builder the uncomfortable question. "What's most likely to go wrong in a project like mine?" A builder worth hiring will give you a straight answer.
Get a pre-renovation inspection on older homes. A few hundred dollars upfront can save you thousands mid-build by flagging structural or compliance issues before work begins.
Split your wishlist into tiers. Know what's non-negotiable and what can be cut or deferred. When something unexpected comes up, you'll already know what to trade off.

Industry Insight According to Consumer NZ, many homeowners underestimate renovation costs by 20–30%, largely due to hidden or unexpected expenses. Building in that buffer isn't optional — it's essential. The goal isn't to fear surprise costs; it's to be financially prepared for them so they become minor inconveniences rather than project-stopping emergencies.

They Have Done Their Research on Consents and Compliance

This is the one that catches many homeowners off guard. Not every renovation requires a building consent, but many do, and the line between what does and doesn't require one isn't always obvious.

In New Zealand, you generally need a building consent for structural work, plumbing changes, and any work that affects the building's weathertightness. Failing to get the right consents doesn't just put your project at legal risk; it can affect your ability to sell the property down the track and could invalidate your home insurance.

Smart homeowners research:

Whether their project needs a building consent from their local council
How long consent approvals typically take in their area (it varies)
Whether their site has any covenants, overlays, or heritage designations that could affect what they're allowed to build
The difference between owner-builder allowances and work that must be done by a licensed building practitioner (LBP)

A good builder will guide you through this process, but going in with some background knowledge means you can ask better questions and move faster. The MJones Building team is happy to walk you through what your specific project is likely to require.

They Have Chosen the Right Builder — Not Just the Cheapest One

Price matters. Of course it does. But choosing a builder based on price alone is one of the most expensive mistakes you can make in a renovation. The lowest quote often means corners cut, materials substituted, or timelines that fall apart halfway through.

Quality building and craftsmanship — MJones Building Waiheke

The right builder brings quality, communication, and accountability to every project.

Smart homeowners look beyond the number on a quote and evaluate the full picture:

Communication Style

Does the builder listen, explain things clearly, and respond promptly? This tells you a lot about how they'll manage your project throughout the build.

Track Record

Ask to see past projects. Read reviews. Talk to previous clients if you can. A builder's history of completed work is the strongest indicator of what you can expect.

Licensing and Insurance

In New Zealand, check if your builder is a Licensed Building Practitioner (LBP) and carries the appropriate insurance. This is non-negotiable.

Fixed-Price vs. Estimate

A fixed-price quote means fewer financial surprises. An estimate can balloon significantly. Know exactly what you're signing up for before you commit.

Guarantees and Warranties

What does the builder guarantee on their workmanship? What recourse do you have if something goes wrong? These conversations should happen before a contract is signed.

Think Long-Term Think of choosing a builder like choosing a business partner for a short period. You want someone who's organised, communicates well, takes pride in their work, and treats your home with respect — not just someone with a competitive day rate.

They Have Thought Through the Disruption and Made a Plan for It

Renovation disruption is real, and underestimating it is surprisingly common. Many homeowners picture a tidy transformation montage. The reality often involves dust through every room, a kitchen out of action for weeks, kids and pets navigating a worksite, and a temporary living setup that gets old fast.

This doesn't mean renovating isn't worth it — it absolutely is. But planning for the disruption in advance makes the whole experience far more manageable.

Things to Sort Before the Build Begins

Where will you store furniture, appliances, and belongings cleared from the work area?
If your kitchen is being renovated, do you have a temporary cooking setup?
Do you have young children or pets who need to be kept away from the site during work hours?
Will you stay in the home, or is a short-term rental more practical for a major renovation?
Have you communicated with neighbours about likely noise and access?

Your builder should provide a clear timeline with milestones. Make sure you understand which phases require you to vacate spaces, and plan around that. The more organised you are on your end, the smoother the whole thing runs.

Frequently Asked Questions

For most medium-sized renovations, start planning at least three to six months before you want work to begin. This gives you time to sort designs, get quotes, apply for any necessary consents, and secure a builder — especially in busy regions or seasons where good builders are booked out well in advance.

The most effective approach is to build a contingency buffer of 15–20% into your budget from the start. Get a detailed, fixed-price quote rather than an estimate, ask your builder about likely hidden issues for your property type, and consider a pre-renovation inspection for older homes. The more informed you are going in, the fewer genuine surprises you'll face.

It depends on the scope of work. Structural changes, additions, plumbing alterations, and anything affecting the building envelope typically require consent. Cosmetic work like painting, new flooring, or replacing like-for-like fixtures usually doesn't. Your local council website or a licensed builder can help you determine what's required for your specific project.

Yes. A builder who charges more but delivers quality work, communicates well, and finishes on schedule will cost you less in the long run than a cheaper option that cuts corners, runs late, or creates issues you have to fix later. Think of it as an investment in the outcome, not just the process.

For smaller renovations, yes — but with some planning and tolerance for disruption. For major renovations (whole-of-home, structural, or those affecting key areas like bathrooms and kitchens), it's worth seriously considering temporary accommodation. Talk to your builder about the timeline and which phases will be most disruptive so you can plan accordingly.

Conclusion

Planning a renovation doesn't have to feel overwhelming. The five things above — getting clear on your vision, budgeting realistically for unexpected costs, understanding consents, choosing the right builder, and preparing for disruption — will form a solid foundation for any successful project.

At MJones Building, the aim is to make the renovation process as clear and stress-free as possible. From the first site visit through to the final walkthrough, we manage every detail so you can focus on looking forward to the result and not worrying about the process.

Whether you're in the early stages of thinking or ready to get a quote, we'd love to hear about your project. Contact MJones Building today, and let's talk about what's possible for your home.

5 Things Smart Homeowners DoWhen Planning a Renovation