House Extensions in Auckland | Certified Home Extensions

You might be feeling…

Overwhelmed (by the Process)?

You don’t have time to manage trades, council requirements, or the endless decisions a building project brings. Lasting quality without the gold-plated extras is what matters most.

Worried (about Costs)?

You know what you can afford, but every story of a budget blowout makes the little voice at the back of your mind question whether extending or renovating is worth the risk.

Unsure (about the Possibilities)?

You know what you want, but you’re not confident it will work, blend with the existing house, or you have no idea what the council requirements might be.

$ m+

projects completed

happy clients

yrs+

experience

Our proven building process, Auckland to Hamilton

01

Chat & clarify

A free, friendly, no-obligation call where you share your ideas, your frustrations, and what you want to achieve. You’ll walk away with clarity on your options and next steps.

02

Design, plan & approvals

Together we turn your vision into practical designs, realistic 3D renders, and a detailed plan. Council requirements, consents, and the stressful decisions are handled for you by our team. With our fixed pricing and clear communication, you’ll always know exactly what to expect.

03

Build & enjoy

Our fully managed construction process takes care of all the hard stuff, with Alvin personally overseeing the project. Sit back and watch your home transform, stress-free, into a space you and your family truly love.

More About Us

Extensions

Looking to add more space without leaving the home you love? We specialise in seamless, end-to-end home extensions that blend perfectly with your existing layout. From concept to completion, we take care of everything.

More extensions info

Before

After

Before

After

Renovations

Want to refresh or modernise your home without the stress? Our fully managed renovation service brings clarity and calm to the process, delivering quality results with minimal disruption and a finished space that you’ll be proud of.

More renovations info

Why you can trust us

Live in comfort

Stay in your home while we renovate, no moving out, no disruption, and our barefoot walking guarantee ensures safety and peace of mind.

Specialist focus

Nearly 25 years specialising in extensions and renovations means you get smarter solutions, better ideas, and a smoother, hassle-free experience.

Company director oversight

Alvin, our Founder, personally oversees every project to make sure your vision is delivered exactly as intended

Pricing certainty

Fixed-price projects give you certainty from start to finish, with no surprises, hidden costs, or last-minute shocks.

Stress free process

We take care of everything from council approvals to trades, so you can relax and enjoy the renovation or extension experience from start to finish.

Clear communication

Every step is explained and every decision guided, so you feel informed, comfortable, and secure throughout your renovation or extension.

What you might be wondering

Not at all. Whether you’re just starting with an idea or you already have plans drawn up, you’re welcome to get in touch. We’ll help you understand your options, refine what you’ve got, and guide you through the next steps so you don’t have to figure it all out on your own.

We’re a full end-to-end design and build team, which means we manage everything for you from concept through to completion. Our clients come to us because they want a clear process, fixed pricing they can trust, and one team taking responsibility for the whole journey. With director-level involvement throughout, you always know your project is being looked after properly.

It's a fair question. Many home extension projects end up costing more than expected because important details are missed early on. We take a different approach. Before providing a fixed price, we develop a detailed scope of works and involve key trades to make sure everything has been properly allowed for. That means your price is based on real costs and careful planning, not estimates or guesswork.

Your fixed price only changes if you decide to change the scope. If something genuinely unforeseen comes up, we’ll talk you through it first and confirm any cost impact in writing before anything goes ahead, so you stay in control of your budget at all times.

Every home extension is different, but most take around 12 months from the early planning stages through to completion. We’ll give you a clear programme at the start so you know what to expect, and we keep you updated throughout so there are no surprises along the way.

In many cases, yes, but it depends on the scale of the work. We’ll talk you through what’s involved early on so you can make an informed decision about what will work best for your family while the build is underway.

Yes — we provide end-to-end project management, from shaping your ideas and connecting you with the right designer, through consenting, and right through construction to completion.

Absolutely. We’ll introduce you to one of our carefully chosen architectural design companies so your home is designed around your lifestyle, needs, and budget.

We build a detailed scope and involve key sub-trades early, then review quotes to make sure nothing is missing — so the fixed-price figure is based on real, checked costs (not guesswork).

Your fixed price won’t change unless you change your mind. If something genuinely unforeseen comes up, you’ll receive a written variation so you stay in control of costs.

During construction your build is checked against a rigorous quality-control checklist, and a final walkthrough is completed before handover to ensure nothing is missed.

Yes — Certified Home Extensions are members of the New Zealand Certified Builders Association, and your project is backed by a comprehensive 10-year residential building guarantee.

More space,
no surprises

Fixed prices, clear communication, and all of the tricky bits taken care of for you