As families grow and lifestyles change, the demand for additional space usually leads homeowners to consider various extension ideas. Options like a side return extension, a rear extension, or a garage conversion can significantly increase a home’s square footage. However, such a project calls for careful planning and consideration. It’s essential to assess not only the practical aspects of the extension but also how it will affect the home’s aesthetic appeal, functionality, and even its resale value.

In this regard, here are some of the most critical considerations you need to keep in mind to help you make an informed decision about the type of home extension that best suits your needs.

Your Budget

Before diving into any home extension project, establishing a realistic budget is crucial. This initial step not only defines the scope of the project but also sets the tone for every decision that follows. Begin by evaluating your current financial situation and determining how much you can comfortably allocate to the extension. Make sure to consider all potential costs involved, including materials, labour, and any additional features you might want to incorporate. In general, building up will usually cost more than building out. This is because adding more floors to a structure necessitates adding stronger foundations.

Take note as well that the overall cost of the project may exceed initial estimates. For instance, rising material prices or structural complications can all impact your budget. Therefore, it’s wise to include a contingency fund to accommodate any unexpected costs that may arise during the construction phase. When it comes to home extensions, the industry standard has been 10% to 15% of your total budget. However, some experts are recommending 15% to 20% due to recent fluctuations in construction costs.

The Purpose of the Extension

Before deciding on the kind of extension you want, think about how the additional space will serve your lifestyle. For example, if you frequently host family gatherings, an open-plan kitchen and dining area may be ideal—which means you’ll likely have to build out to get more horizontal space. On the other hand, if you need a quiet workspace away from the household bustle, a separate office or studio located on a second storey could be more appropriate. Knowing the intended use of the extension will also help streamline the design process, as well as ensure that the finished space meets your specific needs.

The Right Architect and Builders

Working with the right architect and builders is one of the most critical steps in the home extension process. An experienced architect can help bring your vision to life, ensuring that the design is both aesthetically pleasing and functional. Look for someone who has previously worked on similar projects and is familiar with local building regulations and styles. A well-matched architect will not only understand your ideas but also offer valuable insights and suggestions to enhance your design.

Once you have chosen an architect, the next step is to find reputable builders who can turn those plans into reality. This typically involves seeking recommendations from friends and family and researching local construction companies online. During your search, it’s always a good idea to ask for references and read reviews from former clients to gauge the quality of their work and their reliability.

If you’re looking for professional house builders Dunedin residents trust, SB2 Build is a name you can depend on. We’ve been providing reliable services in the Otago region for years, offering high-quality workmanship and expertise across a wide range of building projects. Whether they’re new home builds, home renovations, or home extensions, you can rest assured that our builders will deliver results that meet your needs and exceed your expectations. Fill out this form today so that we can get started with planning your extension project.

The Relevant Permissions

It’s essential to understand the legal requirements, including planning permissions and building regulations, before starting the extension project. These regulations ensure that your extension is safe, sustainable, and compliant with local guidelines. Depending on the nature and scale of your project, you may need to apply for planning permission from your local council. For instance, if you want to build additional storeys, you’re going to need a permit; meanwhile, a ground floor veranda that’s less than 30 square metres may be exempt from building consent. To know if your extension project requires building consent, visit the Dunedin City Council’s official website.

The Timeframe of the Project

The duration of an extension can vary widely based on various factors, including the complexity of the design, the scale of the work, and any delays that may arise during construction. Typically, straightforward projects, such as small outward extensions or conversions, may take anywhere from a few weeks to a couple of months. Meanwhile, larger or more intricate builds, like additional floors, could span several months or even longer. Discuss the timeline with your architect and builders. They can provide you with a realistic estimate based on their experience with similar projects. Additionally, it’s essential to account for pre-construction phases, such as obtaining planning permissions and finalising designs, which can add weeks or even months to your overall timeline.

While it’s vital to stick to a schedule, it’s equally important to remain flexible. There are many factors that can cause delays, including adverse weather conditions, supply chain issues, or unexpected complications during construction. Maintaining regular communication with your builders will help you stay informed about progress and any potential setbacks, allowing you to adjust your plans as needed. Additionally, by allowing for some flexibility in your timeline, you can minimise stress and ensure that the quality of work is not compromised.


Whether you decide on building out or adding an extra floor, a home extension project gives you the opportunity to enhance your living space and adapt your home to fit your evolving needs. However, the process can be overwhelming, especially if you don’t have a solid plan. With these considerations, you can ensure that the project runs smoothly and achieves your vision. Visit SB2 Build’s contact page and fill out the form if you have any questions about our process. We’ll be in contact with you within the same business day.