Residential House Extension

Looking to add more space to your home? We provide residential house extensions that seamlessly blend with your existing structure. Whether you need an extra bedroom, a larger kitchen, or a new living area, our team works closely with you to design and build an extension that enhances your home’s functionality and value.

We prioritize quality craftsmanship and attention to detail, ensuring that your extension not only meets your needs but also complements the aesthetic of your home. Expand your living space with confidence and style, knowing that Rise Residential has got you covered.

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Why Extend Rather than Move Homes?

House extensions mean that you can:

  • Stay in the place you adore
  • Skip the increasing cost of buying and selling
  • Design unique spaces tailored to your lifestyle
  • Increase the value of your home

Design around your changing needs — whether a home office, teenagers retreat, or ground-floor master suite

We create each home extension exactly to suit your site, budget, and aspirations — while ensuring the build is practical and compliant.

House Extension Cost Calculator 

Curious about the cost of your renovation or extension? Try our easy-to-use House Extension Cost Calculator. In just a few clicks, you’ll get a tailored ballpark estimate based on your project details. It’s the perfect first step to planning your dream space, and when you’re ready, our team can provide a detailed, no-obligation free quote to bring your vision to life

Cost Calculator

Our House Extension Services

We design and construct all forms of residential house extensions, including:

Bedroom Additions

Add an extra bedroom or guest suite to accommodate a growing family, add rental value, or create a multi-generational floor plan.

Kitchen & Dining Extensions

Expand and renovate your kitchen to improve circulation, lighting, and functionality — possibly the central spot of any Kiwi home.

Lounge & Living Room Expansions

Create open-plan living rooms or second lounges for entertaining, relaxation, or kids’ play.

Ensuite & Bathroom Additions

We help you add extra bathrooms to increase comfort and convenience — especially worth it in busy homes.

Outdoor-Indoor Room Transitions

From enclosed decks to sunrooms, we design year-round use that unites indoors and outdoors.

Garage, Utility & Mudroom Extensions

Increase storage, safeguard your vehicles, or consolidate laundry and utility activity into defined spaces.

Our Home Extension Process

We offer an entirely managed, transparent process that includes:

Consultation & Site Review

We will visit you on site to discuss your plans and assess the structure, access, and viability of your proposed extension.

Design & Cost Planning

We develop detailed design concepts and architectural plans, ensuring your visions are feasible and compliant — with prices accurately estimated in the first instance.

Consent & Documentation

We handle council consent submissions, including building and resource consents where required, saving you time and hassle at paper stage.

Construction & Quality Assurance

Our licensed team delivers high-quality work with strict oversight, regular updates, and minimal disruption to your daily life.

Final Walkthrough & Handover

We’ll walk through the completed extension with you, handle Code Compliance certification, and ensure every detail exceeds your expectations.

Can I Add An Extension To My House?

We create each home extension exactly to suit your site, budget, and aspirations while ensuring the build is practical and compliant.

Christchurch Building Conditions – What You Need to Know

  • When building an extension in Christchurch, you’ll need to take into account:
  • Earthquake strength and land classification (TC1, TC2, etc.)
  • Zoning rules such as height-to-boundary restrictions and minimum setbacks
  • Flood and drainage overlays that may affect floor levels and materials
  • Christchurch City Council or Selwyn District Council consent requirements

Our specialist experts work with architects, engineers, and planners to construct every extension to your liking and within necessary regulations

Extending your house is always a workable option to create more living space without the hassle that comes with relocating. We provide a full package in designing and constructing extensions that effectively match your current house, whether functional or aesthetic, or both.

Our team will not only appraise your property for the type of extension that best suits it, but also discuss with you all the needs and take you through any local council regulations so that your extension meets the criteria for potential additions and compliances.

The extra bedroom, larger kitchen, maybe the new living area-we can build it all for you. Look no further for all this and more, as our expert builders are here to make it happen for you.

There are a few important steps and considerations to keep in mind:

  1. Building Consent: Most house extensions will require a building consent. This is necessary for any structural work, additions, or significant alterations. Ensure your plans comply with the Building Code and check with the Christchurch City Council to see if your specific project requires consent​.

  2. Resource Consent: Depending on the scope and impact of your extension, you might also need a resource consent, especially if your project affects the environment, heritage sites, or neighbouring properties​.

  3. Planning and Design: Before starting, it’s crucial to have a detailed plan. Consider your budget, the extension’s design, and how it integrates with your existing home. Hiring an architect or a professional builder can help streamline this process and ensure all regulations are met.

  4. Professional Help: Using licensed tradespeople is essential. They ensure the work meets safety and quality standards and handle the necessary paperwork for consents and permits​.

By following these guidelines, you can successfully add an extension to your home, enhancing its value and functionality. For detailed information, you can consult the Christchurch City Council’s resources or visit the New Zealand Government’s renovation guidelines online.

House Extension Design

Designing house extensions is not only about adding rooms; rather, it is all about harmonious flows between old and new. Extension design with us includes comprehensive services that closely work with you to understand your vision and translate it into a practical and beautiful reality. 

We take into account natural light, the style of architecture, and your lifestyle needs to make it work in design for your home. Our team works for you to ensure the extension feels like a part of your home, including the much-needed extra space.

Home Extension Plans

No home extension project is without detailed planning. Be it the concept or the final build, there has to be a perfectly professionally sketched plan. Our home extension specialists have professional expertise to provide all-inclusive planning services for your extension. 

Our home extension plans cater to your needs and budget and don’t even leave out a single minute detail. We work in tandem with architects and engineers to provide plans that are not only pleasing to look at but also have structural integrity so that the new space adds functionality and value to your home.

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Frequently Asked Questions

Most extensions do require building consent and sometimes resource consent. We’ll manage all documentation and submissions for you.

Yes. We take great care to blend materials, roofing, cladding and joinery so your extension looks like part of the original home.

A small extension can take 8–12 weeks; larger or double-storey projects may take 4–6 months, including consent timelines.

Yes. We manage every trade on your behalf — including plumbing, electrical, plastering and painting — ensuring consistent quality.

In many cases, yes. We’ll work with you to minimise disruption and schedule the build phases accordingly.

A well-designed and executed house extension can significantly increase your property’s value by enhancing its functionality and appeal. However, the actual value added depends on factors such as the quality of workmanship, the type of extension, and current market conditions.

Client Reviews

Excellent

Based on 26 reviews

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Minna Wilson
2 months ago

Ben and his team did a great job of our renovation, the quote was well priced. Super tidy and fast work! Great attention to detail.

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Carly Flowers
1 year ago

Rise Residential built an extension to our 1920s house in Somerfield earlier this year. From our first meeting, Ben impressed us with his knowledge and clear communication throughout the project.

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Samantha Samuel
1 year ago

Rise Residential completed a kitchen and bathroom renovation for us. Ben and Caleb were very professional and organised throughout the six-week project.

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Chris Guerin
1 year ago

Incredible attention to detail keeping me, the customer, informed over six months how the repair was progressing.

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Peter Robinson
1 year ago

Nicola and I found Ben and his team to be professional without fault. Ben really took the time to understand what we wanted to do to our dwelling.

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Sara Wilson
1 year ago

Ben and his team were amazing! Ben really took the time to understand what we wanted and made the process smooth and effortless. Our extension was completed to an excellent standard in a great timeframe. I would absolutely recommend Ben and Rise Residential.

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Natasha Montagu
1 year ago

We used Rise Residential for a renovation of our home. Straight off the bat we found Ben the owner to be highly organized, efficient and a pleasure to deal with.

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Conor Doran
1 year ago

I simply can't recommend Ben and his team enough! Apparently building a house is stressful. Well, can't say we experienced that! New build was delivered on time and to a high quality.

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Robin White
1 year ago

At RW Design Ltd, we've had the pleasure of collaborating with Rise Residential on multiple projects. Their experience and expertise in both new builds and renovations really shows.

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Luke Martlew
2 years ago

Impressed how Rise Residential handled the whole build process. Appreciate the good workmanship, and I will definitely use them again in the future. It's been a pleasure working alongside Rise Residential, thanks again for helping me achieve this project.

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Sharyn Ford
3 years ago

Ben came to talk us through what our options had. Quote was sent in a timely manner and a time frame of when the job would be done.

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Kirsty Humm
3 years ago

Couldn't recommend Ben and his team more! We were stressed and nervous before starting our work, having heard stories of the horrors of building, but that wasn't our experience at all.

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Grigor McDonald
3 years ago

We decided to build a self contained flat onto our existing house. We selected Rise Residential and we had a very good experience working with Ben and his team.

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Conrad Fit
3 years ago

You won't find a better building company in Canterbury. From day 1, Ben has been spot on with communication and made our 12 week renovation as easy as it could be.

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Ros Calvert
4 years ago

Ben and his team were within budget, within the time quoted and dealt with any problems that arose quickly and efficiently. The standard of work was excellent and I would highly recommend this firm to anyone looking to build new or renovate their home.

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Laura Ford
5 years ago

Ben assisted with and managed the remodelling of our ensuite bathroom. We couldn't be happier with the finished product and Ben's professional service.

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Valerie Temby
5 years ago

Ben replaced the exterior weatherboards on a wall of my 1905 cottage. He responded quickly to my initial inquiry and I was really impressed by Ben's friendly, professional approach.

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M T M
5 years ago

Ben was great to work with on my latest renovation project. He spent time working through the quote and refined expectations before we started.

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Grant Stowell
5 years ago

Ben did a fantastic weatherboard repair job at our house, had great skills, communication and was awesome to deal with.

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Trish Newman
5 years ago

Excellent service, no mucking around, friendly and relatable. Skilled contractor. Thank you! Recommended.

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Graeme Gordon
5 years ago

Rise Residential was able to start a little earlier than the expected date and appraised us of all details we should know in layman's terms.

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Ash Blake
5 years ago

Very satisfied with the job. Great advice and helpful ideas.

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Casey-Lee Wilson
5 years ago

Rise Residential are really great to work with, Ben and his team take pride in their work, they turn up on time, they clean up after themselves and are competitively priced.

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Lauren Tulitt
5 years ago

Ben from Rise Residential was wonderful to deal with, very good with giving options and explaining the process of our renovations along the way.

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Ryan Morris
5 years ago

I engaged Rise Residential to remodel my existing bathroom. The work was completed swiftly and to a very high professional standard.

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Richard Sturges
6 years ago

We have worked alongside Ben for over five years. Ben is one of the best craftsmen around. Would highly recommend Rise Residential for any future works. Thanks, Richie.

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