House Extensions in Auckland | Certified Home Extensions

Hear from those we've worked with

      EXCELLENT  
   Based on 26 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Amanda And Deane Clark 
 
 
 
 Trustindex verifies that the original source of the review is Google. Alvin, Emily and the team were a pleasure to deal with. Attentive replies to councils very detailed requests, made the process easier and more seamless. All the tradies were friendly and reliable. Pleased with the final outcome and would happily use the team again for future projects.
  
 
      Posted on Google  
   
   Rames Pavadan 
 
 
 
 Trustindex verifies that the original source of the review is Google. "I recently worked with Alvin and his team, and I am truly impressed by their commitment to detail. From the very first consultation, it was clear they prioritize every aspect of the project. They took the time to understand my needs and consistently went above and beyond to ensure nothing was overlooked. It's rare to come across a company that cares so much about the finer details, but Certified Home Extensions definitely sets the bar high. I highly recommend them for anyone looking for meticulous, top-tier service. You won’t be disappointed!"
  
 
      Posted on Google  
   
   Meleane Tava 
 
 
 
 Trustindex verifies that the original source of the review is Google. We used CHE to add an extension to our home. As this was a first huge project not everything was smooth sailing but Alvin and his team helped us reach our goal. Emily was amazing to deal with and always got back quickly with any questions we had. Only reason for the 4 star rating was we had a few problems with the painters, having to come back a few times to fix up some imperfections, otherwise we are very happy with the work that we had done.
  
 
      Posted on Google  
   
   Colin M 
 
 
 
 Trustindex verifies that the original source of the review is Google. We used CHE for our home renovations, Alvin and the team were easy to deal with, accommodated changes on the fly and made suggestions and improvements all the way through the project. Big shout out to Emily as well for her patience and support from start to finish!
  
 
      Posted on Google  
   
   Patrick Baker 
 
 
 
 Trustindex verifies that the original source of the review is Google. I have known Alvin and Emily from Certified Home Extensions for a number of years and Alvin has always been helpful when coming in to guide me with my home renovation - his team is trustworthy and friendly - family owned business who love to help people with end to end project management for your next renovation dream - highly recommended!!!
  
 
      Posted on Google  
   
   John van Winden 
 
 
 
 Trustindex verifies that the original source of the review is Google. Alvin has assisted his client with a major renovation and extension to their family home and I was privileged to assist in organising the finance.  When working with builders it is important they are open and transparent on the quoted costs, and in case of renovation / moving a home / adding an extension, Alvin went beyond his scope and him and his team kept us involved all the way through the project and this made the management of the funds relatively easy.  The home looks great and the clients are very happy.  I would recommend Alvin and his team to anyone who may think about a renovation project.
  
 
      Posted on Google  
   
   suem99 
 
 
 
 Trustindex verifies that the original source of the review is Google. CHE did an amazing job with the two projects they have undertaken for Franklin Hospice.  The quality of the work was outstanding and all the staff and tradies were accomodating, friendly and even cleaned up after themselves.  Great job CHE - I would highly recommend  Sue
  
 
      Posted on Google  
   
   Alison D 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great company to work with. They have been extremely reliable and efficient.
  
 
      Posted on Google  
   
   Lewis T 
 
 
 
 Trustindex verifies that the original source of the review is Google. Communication throughout the entire process was on point! We were kept across all major milestones and most of the back and forth with other parties was handled entirely for us. The absolute key standout for myself and my family was that the work could be done (safely) while we were still living in our home. We knocked down walls, extended a room even replaced a wall with a new ranch slider and deck. A toddler and a cat could remain in the house throughout thanks to the processes, experience and cleanup that the team employed. Great group to work with, if you value quality, clear communication and safety then it's a no brainer in my opinion. You definitely get what you pay for!
  
 
      Posted on Google  
   
   Suhaylah Harun 
 
 
 
 Trustindex verifies that the original source of the review is Google. Absolutely love the work Alvin does for us. Super fast and efficient. Definitely recommending to all my families and friends.

Hear from more happy clients

What you might be wondering

Every home extension and/or renovation is different, so the budget you'll need will depend on a range of factors unique to your project.

The size of the project is certainly one consideration, but it's far from the only one. Style and construction of your existing home, the slope of your land, site access, the level of finish you choose and the type of work involved will all influence the final cost. For example, adding a bathroom as part of an extension or renovation will generally cost more than creating a larger living area because it requires additional plumbing, waterproofing, electrical work and specialised trades.

While it's impossible to provide an exact figure without more information, we can usually give you a realistic ballpark estimate over the phone based on what you've told us and our experience delivering home extensions and renovations across Auckland and Hamilton. That initial conversation is designed to help you understand what's realistically achievable within your budget. We'll answer your questions, talk through your ideas and provide an honest ballpark estimate so you can decide whether or not to move forward with your project.

The honest answer is that it depends, but for most people the decision comes down to their answer to one question do you still love where you live?

If you've outgrown your home but still love your neighbourhood, school zone, commute and the community around you, extending and renovating can often be a better option than moving. It allows you to create a home designed around the way your family lives, without giving up everything you already love about where you are.

When people think about moving, they often focus on gaining more space, but it's easy to overlook what they might be leaving behind: the location, the garden, the neighbours, the lifestyle and the things that made you choose your current home in the first place. Of course, renovating isn't always the right answer. If your location no longer suits your lifestyle, you're wanting a different area or your current home simply cannot achieve what you need, moving may be the better option.

Our role isn't to convince you to renovate at all costs. It's to help you understand your options and make the decision that's right for you. If extending and renovating is the right choice, we'll help you create a home that works better for the way you want to live.

In most cases, absolutely.

Because we specialise in home extensions and renovations, we're very experienced at working around families who choose to remain in their homes throughout construction. With good planning, clear communication and dedicated living and construction zones, it's often much easier than people expect.

While there are times when temporary arrangements may need to be made, particularly if work affects your kitchen or bathroom, we'll discuss these with you well in advance so there are no surprises. The goal is always to minimise disruption and keep your home as functional as possible throughout the build.

Some builders will recommend moving out because it can make construction easier for them. Our approach is different. We understand that most homeowners would rather stay in the home they love, so we do everything we reasonably can to make that possible. Our goal isn't just to build you a beautiful home extension and/or renovation. It's to make the journey there as smooth and stress-free as possible.

The first step is simply getting in touch.

You can either fill out our contact form or give our team a call, and we'll have a conversation about your ideas, your home and what you're hoping to achieve.
From there, we'll arrange a time to come and meet with you at your home. We often describe this first meeting as a bit like a first date. It's an opportunity for you to get to know us, understand how we work and ask any questions you may have, while we get to know you, your goals and what you're looking to achieve from your home extension and/or renovation.

At the end of that conversation, we'll both have a better understanding of whether we're the right fit to work together. If we are, we'll guide you through the next steps and help turn your ideas into a clear plan for your project.

Building a relationship based on trust is important to us because your home extension and/or renovation is a significant investment. We want you to feel confident not only in the finished result, but also in the people you have chosen to help you get there.

The honest answer is that it depends on the size and complexity of your project. A straightforward renovation may take significantly less time, while larger home extensions, structural renovations and projects requiring detailed design and council approvals can take 12 to 18 months from your first conversation with us through to completion.

It’s important to understand that the construction phase is only one part of the journey. Before work can begin, there is often a lot happening behind the scenes, including understanding what you want to achieve, developing the design, preparing detailed pricing, completing any required engineering and working through council approvals.

Taking the time to properly plan before construction begins helps create a smoother build. It allows important decisions to be made when they are still easier to change, helps identify potential challenges early and gives everyone a clearer understanding of what is involved before work starts.

Once construction begins, we’ll provide a realistic timeframe for your specific project and keep you updated throughout the build, so you always know what is happening and what comes next.

Every project is different, but our focus is always on taking the right amount of time to plan properly, build carefully and deliver a finished home that works for the way you want to live.

In most cases, home extensions and significant renovations will require Building Consent. Depending on your property and the scope of your project, you may also need Resource Consent. This is more common if your home is in a heritage area, you're close to your boundaries, your property is affected by planning constraints or your project doesn't comply with the Auckland or Hamilton district plan.

The good news is that you don't need to work this out yourself. During our first meeting, we'll discuss your ideas, identify which approvals are likely to be required and explain the process in plain English, so you know exactly what to expect.

If consent is required, we'll manage the process for you from start to finish, working alongside the designer, council and any consultants needed to help keep your project moving. Our goal is to remove as much of the complexity as possible, so you can focus on the exciting parts of planning your home extension and/or renovation.

Yes.

Once your concepts have been finalised and the required documentation has been completed, we'll prepare a fixed-price proposal that clearly outlines exactly what's included, along with any exclusions, so everyone has a clear understanding of the project before construction begins.
We put a significant amount of time into preparing our fixed-price proposals because we believe the more time and effort invested upfront, the fewer surprises there are later. Our detailed cost indication process allows us to price your project as accurately as possible, giving you confidence that you're making informed decisions before committing to construction.

A fixed-price proposal provides certainty. Rather than relying on assumptions or rough estimates, you'll know exactly what you're getting, what it's expected to cost and what's included before any work begins. We believe that clarity upfront leads to a smoother, more enjoyable home extension and/or renovation for everyone involved.

That's actually one of the best times to get in touch.

Many people assume they need plans drawn, a clear idea of exactly what they want or a construction start date before speaking to a builder. In reality, most people we meet are still exploring ideas and trying to understand what is possible.

Our role at this early stage is to help you understand your options, talk through your ideas and work out what makes sense for your home, lifestyle and budget. You don't need to have all the answers. That's exactly what we're here to help with.

It's also worth understanding that a home extension or renovation is not something that happens overnight. From your first conversation through to construction beginning is often around 6 months or longer, depending on the complexity of the project, design requirements and council approvals.

Taking the time to plan properly upfront helps avoid costly changes later and creates a smoother building experience. After completing more than 230 extension and renovation projects, we've seen that there is often more than one way to achieve the outcome you're looking for. Our job is to help you find the option that best suits your home.

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.

Amanda And Deane Clark

Alvin, Emily and the team were a pleasure to deal with. Attentive replies to councils very detailed requests, made the process easier and more seamless. All the tradies were friendly and reliable. Pleased with the final outcome and would happily use the team again for future projects.

Rames Pavadan

"I recently worked with Alvin and his team, and I am truly impressed by their commitment to detail. From the very first consultation, it was clear they prioritize every aspect of the project. They took the time to understand my needs and consistently went above and beyond to ensure nothing was overlooked. It's rare to come across a company that cares so much about the finer details, but Certified Home Extensions definitely sets the bar high. I highly recommend them for anyone looking for meticulous, top-tier service. You won’t be disappointed!"

Meleane Tava

We used CHE to add an extension to our home. As this was a first huge project not everything was smooth sailing but Alvin and his team helped us reach our goal. Emily was amazing to deal with and always got back quickly with any questions we had. Only reason for the 4 star rating was we had a few problems with the painters, having to come back a few times to fix up some imperfections, otherwise we are very happy with the work that we had done.

Colin M

We used CHE for our home renovations, Alvin and the team were easy to deal with, accommodated changes on the fly and made suggestions and improvements all the way through the project. Big shout out to Emily as well for her patience and support from start to finish!

Patrick Baker

I have known Alvin and Emily from Certified Home Extensions for a number of years and Alvin has always been helpful when coming in to guide me with my home renovation - his team is trustworthy and friendly - family owned business who love to help people with end to end project management for your next renovation dream - highly recommended!!!

John van Winden

Alvin has assisted his client with a major renovation and extension to their family home and I was privileged to assist in organising the finance. When working with builders it is important they are open and transparent on the quoted costs, and in case of renovation / moving a home / adding an extension, Alvin went beyond his scope and him and his team kept us involved all the way through the project and this made the management of the funds relatively easy. The home looks great and the clients are very happy. I would recommend Alvin and his team to anyone who may think about a renovation project.

suem99

CHE did an amazing job with the two projects they have undertaken for Franklin Hospice. The quality of the work was outstanding and all the staff and tradies were accomodating, friendly and even cleaned up after themselves. Great job CHE - I would highly recommend Sue

Alison D

Great company to work with. They have been extremely reliable and efficient.

Lewis T

Communication throughout the entire process was on point! We were kept across all major milestones and most of the back and forth with other parties was handled entirely for us. The absolute key standout for myself and my family was that the work could be done (safely) while we were still living in our home. We knocked down walls, extended a room even replaced a wall with a new ranch slider and deck. A toddler and a cat could remain in the house throughout thanks to the processes, experience and cleanup that the team employed. Great group to work with, if you value quality, clear communication and safety then it's a no brainer in my opinion. You definitely get what you pay for!

Suhaylah Harun

Absolutely love the work Alvin does for us. Super fast and efficient. Definitely recommending to all my families and friends.

More space,
no surprises

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

More space,
no surprises

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

You love where you live, but your home isn’t working for your family. Maybe you need more space, a better layout, or a stylish modernisation, and you’re not sure where to start. That’s our speciality.

You might be feeling…

Our proven building process, Auckland to Hamilton

01

02

03

Extensions

Renovations

Why you can trust us

Live in comfort

Specialist focus

Company director oversight

Pricing certainty

Stress free process

Clear communication

Hear from those we've worked with

What you might be wondering

Trusted By

Get in touch

If our approach sounds like what you’re looking for, book your free 15-minute clarity call here. Zero pressure, just a no-obligation chat about what’s possible and how we can help you best.

Bombay based, covering Auckland and Hamilton regions

Get in touch

If our approach sounds like what you’re looking for, book your free 15-minute clarity call here. Zero pressure, just a no-obligation chat about what’s possible and how we can help you best.

Bombay based, covering Auckland and Hamilton regions

Give us a call

Follow Us

Proud sponsors of

More space, no surprises

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

More space, no surprises

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

You love where you live, but your home isn’t working for your family. Maybe you need more space, a better layout, or a stylish modernisation, and you’re not sure where to start. That’s our speciality.

You might be feeling…

Our proven building process, Auckland to Hamilton

01

02

03

Extensions

Renovations

Why you can trust us

Live in comfort

Specialist focus

Company director oversight

Pricing certainty

Stress free process

Clear communication

Hear from those we've worked with

What you might be wondering

How much should I budget for my home extension and/or renovation?

Is it cheaper to renovate or move?

Can we live in our home during the build?

What does the process look like?

How long does a home extension and/or renovation take?

Do I need Building or Resource Consent?

Do you offer a fixed price?

What if we're not ready to start yet?

Do you manage the whole project for us?

Can you help us find an architectural designer?

How do you give a fixed price (especially for extensions)?

What if something changes during the build?

How do you ensure quality from start to finish?

Are you certified, and is there a guarantee?

Trusted By

Get in touch

If our approach sounds like what you’re looking for, book your free 15-minute clarity call here. Zero pressure, just a no-obligation chat about what’s possible and how we can help you best.

Bombay based, covering Auckland and Hamilton regions

Get in touch

If our approach sounds like what you’re looking for, book your free 15-minute clarity call here. Zero pressure, just a no-obligation chat about what’s possible and how we can help you best.

Bombay based, covering Auckland and Hamilton regions

Give us a call

Follow Us

Proud sponsors of

More space,
no surprises

More space,
no surprises