Waikato House Extension Builders

living room extension leading out to an outdoor dining area with sliding doors

House extension designers and builders in Hamilton

The Waikato region is known for both its far-reaching farmlands and quaint seaside properties. Whether your property allows you to extend outward or upward, Refresh® Waikato’s home extension builders can work with you to develop your home into the perfect space for you and your family. 

Will a house extension add value to my home?

Your home should mirror your lifestyle changes over time. In many cases, these changes take the form of house extensions to add more space and value to your Hamilton home. Read on to discover tips and inspiration for your new home extension.

What to consider when extending your home

The house extension process reaps many rewards, including expanding your living space and increasing your home’s value. But before you start planning out your house extension design, it’s important to consider the following:

Current layout

Do you have room on your property for an extension? If so, what will be the best place to extend? This could be a bedroom, kitchen, living room, or even garage extension. If you’re short on square metres, you might want to consider building vertically.


House extensions vary in price, depending on the size and scope of your project. It’s important to outline a budget first, and then explore the design options to compliment your home and your wallet. Cost-effective extensions are possible with the right amount of planning in place!


Think about the design and style that would best complement the rest of your home. There are also opportunities to blend contemporary and traditional design in a tasteful manner.

Discover your home extension options by reading our ultimate guide to extending your home.

wooden stairs leading to a second storey addition

Why is Refresh Renovations® the best option in Hamilton?

Refresh® provides a world-leading project management system that has changed the way homeowners experience renovations, locally and globally. Your Waikato extension specialist will be your one point of contact throughout your home extension. This means that any extension work will be carried out by a reliable and trusted team while schedules, project budgets and the final deadline will be managed for you by a local professional - while you can track every step in our Customer Portal! Our customers are happy with the process:

“Consistent communication and timely completion” - Darren, Refresh Waikato customer

Checkout our house extension projects around New Zealand! Build your dream house extension in Hamilton! 

What house extension services does Refresh provide?

Refresh® Waikato house extension builders work on a wide range of house extension projects and are open to all extension inquiries. Some of our services include:

  • Ground floor extensions
  • Second storey extensions
  • Renovation extensions
  • Open plan extensions
  • Remodelling
  • Room additions
  • Small home extensions
  • Concepts and working drawings
  • Producing house extension designs
  • End-to-end project management
side extension with open plan solution

Not sure about the different types of house extension options for you? Check out our house extension guide now!

The Refresh process for your home extension

When you choose Refresh to work on your home extensions in Hamilton, you benefit from a streamlined service with clear communication every step of the way. The 5-process begins with a free, no-obligation consultation where you’ll speak to a designated Waikato Renovation Consultant about your vision and ideas for your home extension. You’ll receive expert advice on everything from design elements, labour requirements, and how to best allocate the project’s budget. 

Your Renovation Consultant will share working drawings with you to ensure you are happy with the rendering of your home extension. After acquiring any council documentation, your Renovation Consultant will let you know when construction can begin!

Our Refresh team has access to an exceptional network of suppliers and contractors to provide you with the best quality and rates. Your Renovation Consultant oversees house builders and the entire renovation team to keep your project running on time and on budget. Meanwhile, you’ll stay informed via our intuitive online client portal.

At the end of the construction phase, your Renovation Consultant will make sure that the changes are code-compliant before leaving you to enjoy this beautiful, brand new addition to your home.

Refresh house extensions across New Zealand

Check out some of Refresh’s most recent home addition projects:

Exterior renovation in Auckland

  • Cedar cladding
  • Vinyl decking
  • Balcony addition with glass railing

Interior renovation and extension for $207,390

  • Reconfiguring the homes layout
  • Two new bathrooms and laundries
  • Kitchen renovation
  • Enclosing the front deck to create an extended living

Home extension for a growing family in Auckland

  • New master suite
  • Extension upwards and outwards
  • New laundry and garage
white house with rear extension

Check out why customers are happy to build house extensions with us. Listen to our happy customers in the Hamilton and Waikato areas

What do I need to know about a house extension in the Waikato region?

If you are hoping to extend your home in the Waikato region, there are a few things to consider. 

Is your home heritage listed? If so, you will need to apply for permission to carry out extension work, through Heritage New Zealand. Your extension builder can assist with this.

Budget blowouts are a common problem when it comes to house extensions due to the longer timelines, council consents and designs required. Stressing the importance of working with a specialist house extension consultant to guide you through the process. 

Being aware of how close you can build to the boundary in Waikato is important when extending your home. Depending on the location of your section will depend on how it is zoned with the council, for example, rural low or medium density residential. See the latest types of houses and neighbourhoods council information here. 

Lastly, the Waikato council and communities are very mindful of sustainability, so ensure you take this into account in terms of materials and waste during your extension. Talk to your extension consultant about using sustainable resources, energy efficient appliances and reusing or recycling any construction waste.

Do I need council approval to extend my house?

Your home extension will require council permission, which Refresh® Waikato can take care of for you. Refresh® extension builders work closely with local councils and will work quickly to submit applications and get them approved. They will ensure all work meets local standards and that the final result is of the highest quality.

How much will my home extension cost in Waikato? 

The cost of a building extension depends on each individual’s budget and specifications. $30,000 tends to be the minimum cost of home extensions. Building a kitchen extension could cost anywhere between $30,000 - $85,000+, depending on your ideas. Around $30,000 - $120,000+ is generally the price range of bedroom and ensuite renovations. 
It is best to seek a cost estimate from your local house extension consultant, as they will be able to provide a quote accurate to your specific project.
*Please note: these costs are rough estimates only and are subject to change

extended kitchen with dinner table and kitchen island

Not sure how a house extension can make a difference to your property? Check out our guide now!

Tips for a cost-effective home extension renovation

With proper planning and budget allocation, it is possible to extend your Hamilton home without breaking the bank! Discover our cost saving tips:

Start with a defined budget

Your Waikato Renovation Consultant will ask for your budget parameters from the outset. This way, they can help you best allocate your funds towards meaningful, long-lasting changes.

Consider materials

The materials you choose have a massive effect on your project’s bottom line. Today, there are many budget-friendly options to replace what would be an expensive material. Some examples of affordable materials include reclaimed timber, stone cladding, fresh concrete, and industrial steel.

Consider your build site

Groundwork is a hidden yet substantial cost for your project. Choose to extend in an area that’s free from underground plumbing or electrical wiring.  

On top of this, your Renovation Consultant will be able to inform you of other ways to save on your home additions in Hamilton and other places in Waikato.

Book your free consultation with a Refresh house extension specialist near you!

If you would like to discuss your ideas with a home extension specialist, get in touch with Refresh® Waikato to arrange a free one-hour consultation.