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How long does it take to build a single storey extension?

13 December 2023

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A house extension project can take anywhere from a few weeks to several months to complete. Smaller and less complex extensions, such as adding a single room or a small kitchen extension, may take around 4-8 weeks. Medium-sized extensions, such as adding multiple rooms or expanding the living space, can take around 2-4 months. Larger and more complex extensions, such as multi-story extensions or extensive renovations, can take several months or even longer, depending on the scope of the project.

How long does a house extension take?

In a world where our homes are the canvases of our lives, there comes a time when we yearn to expand the boundaries of our comfort and creativity. We envision a single-storey extension, a beautiful addition to our existing abode, where new possibilities can unfold. But as our aspirations take flight, practical questions arise. How long will it take for this vision to come into reality?

The answer, there is no one-size-fits-all timeframe when it comes to the construction of a single-storey extension. The uniqueness of each project, the dance between design and execution, and the interplay of factors unique to your undertaking will shape the timeline. From the initial spark of inspiration to the final coat of paint, a symphony of planning, craftsmanship, and coordination must harmonise to bring your extension to life. Let’s dive into the details!


1. Free Consultation

  • Duration: Typically a few hours to a day on a suitable day.
  • Task: Discuss your ideas, requirements, and budget with a professional contractor or architect who can provide initial guidance and advice.

During the initial phase of a house extension project, you can Book a Free Consultation with your design consultant/ professional contractor. A few hour-long consultations serve as an opportunity to discuss your aspirations and ideas for the home extension while taking into account the existing house structure. The design consultant will listen attentively to your vision, understand your requirements, and provide expert guidance based on their knowledge and experience.

This consultation allows you to share your thoughts, ask questions, and receive valuable insights regarding the feasibility and potential design options for your home extension. It is the first step towards transforming your vision into a tangible plan, setting the stage for the subsequent phases of the project.

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2. Design and Planning Phase

  • Duration: A few weeks to a month
  • Tasks:
    -Collaborate with an architect or designer to develop detailed drawings and plans for the extension.
    -Consider factors such as the layout, structural requirements, materials, and aesthetics.
    -Revise and finalise the design based on your feedback and requirements.

The Design and Planning Phase is a crucial stage in the process of building a home extension. It typically spans a few weeks to a month, depending on the complexity of the project. The design phase involves translating your ideas into detailed drawings and plans, considering factors such as the layout, structural requirements, and aesthetics. The architect will collaborate with you, taking into account your preferences and needs, to create a design that smoothly integrates the new extension with your existing home.

This phase also involves selecting appropriate building materials, evaluating options for new foundations if required, and discussing elements such as a new kitchen or additional living space. The final design serves as a blueprint for the subsequent building process, ensuring that all aspects of the extension are carefully considered and planned before construction begins. The Design and Planning Phase sets the foundation for a smooth and efficient building process, helping to bring your dream of a home extension closer to reality.

Explore: Single Storey house designs

3. Permits and Financing

  • Duration: A few weeks to a few months
  • Tasks:
    -Obtain necessary permits and approvals from local authorities, which may include planning permission and building permits.
    -Arrange financing if needed, including obtaining quotes and finalising loan or funding options.

During the permit phase, we will navigate the required paperwork and liaise with the relevant authorities to ensure compliance with building regulations. We will gather the necessary documentation, such as architectural plans, engineering reports, and any other required information, to submit a comprehensive application. The timeline for obtaining permits can vary based on the specific requirements of your project and the workload of the local authorities.

This process may involve obtaining quotes, finalising loan terms, and ensuring that your financial arrangements align with your budget and project timeline. By entrusting the permits and financing aspects from start to finish to Dhursan Construction, you can benefit from our expertise and experience, potentially reducing the time and effort required on your part!

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4. Site preparation

  • Duration: A few days to a few weeks
  • Tasks:
    -Clear the construction area of any obstacles or existing structures.
    -Prepare the site for construction, which may involve excavation, levelling, and addressing drainage or utility considerations.

Imagine the anticipation as the area around your home starts to transform. Excavation, if required, is carefully carried out to lay the groundwork for the new addition. Every step is taken to ensure that the site is ready to support the construction of your dream extension. This phase typically spans a few days to a few weeks, depending on the scope of the project. During this time, the construction site undergoes a meticulous process of clearing, levelling, and preparing for the extension’s construction.

Site preparation is not just about making way for the physical construction; it is an investment in the future value of your home. Proper site preparation ensures that the extension is built on a solid foundation, minimising potential issues and maximising the longevity of your new space. It ensures that the construction process proceeds smoothly, reducing delays and complications along the way.

5. Foundation and structure

  • Duration: A few days to a few weeks
  • Tasks:
    -Lay the foundation for the extension, which may involve pouring concrete footings and constructing the base.
    -Build the structural framework, including walls, beams, and columns, for the extension.

The foundation and structure phase of building an extension is a critical step that forms the backbone of your project. This phase typically takes a few days to a few weeks, depending on the size and complexity of the extension. As you envision your home extending, skilled professionals work diligently to bring that vision to life.

The foundation is carefully laid, providing a solid and stable base for the structure. With each beam, column, and wall erected, the extension takes shape, gazing into the future. This phase not only extends your home physically but also adds value to your property. The meticulous attention to detail and craftsmanship during the foundation and structure phase ensures that your extension is built to withstand the test of time, providing a durable and secure space for you and your family to enjoy for years to come!

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6. External and Internal work

  • Duration: Starting a few weeks to a few months.
  • External Tasks:
    -Install the roof, windows, and doors of the extension.
    -Complete external finishes, such as cladding, rendering, or brickwork.
    -Conduct any necessary external modifications or additions, such as landscaping or decking.
  • Internal Tasks:
    -Install electrical and plumbing systems for the extension.
    -Complete insulation, drywall, and internal partitions.
    -Install flooring, fixtures, and fittings.
    -Conduct any necessary painting or wallpapering.

During the external work phase of a house extension project, it typically takes a few weeks to a few months to complete. Exterior extensions like roofing, windows, and doors are installed, ensuring a weather-tight and secure space. Attention is given to external finishes, such as cladding, rendering, or brickwork, to create a cohesive and visually appealing appearance. Any required external modifications or additions, such as landscaping or decking, are also taken care of, enhancing the overall aesthetics and functionality of your rear extension.

The internal work phase of a home extension project is equally important and typically starts a few weeks into the construction process, continuing for a few months. Installation of electrical and plumbing systems, Insulation, drywall, and internal partitions are completed, creating well-insulated and defined spaces within the extension. Flooring, fixtures, and fittings are carefully installed, adding the final touches to your new space. Painting or wallpapering is done, bringing the interior to life and reflecting your personal style.

8. Final touches

  • Duration: A few days to a few weeks
  • Tasks:
    -Conduct final inspections and address any outstanding issues or snagging.
    -Apply finishing touches, such as painting, polishing, and cleaning.
    -Ensure all systems and components are functioning correctly.
    -Obtain the necessary certifications and approvals for the completed extension.

Our skilled professionals focus on adding those essential elements that make your extension feel like home. This includes installing fixtures, such as lighting and hardware, applying final paint or wallpaper, and adding any additional decorative elements. Attention to detail ensures that every aspect of your extension is carefully considered and aligned with your desired aesthetic.

It’s essential to consult with local professionals, such as architects and contractors, who will provide more accurate estimations based on your location, project requirements, and local construction practices.
Get in touch with Dhursan Construction, one of the most reputed home builders in Sydney, NSW!

Single-storey extension with Dhursan as your Home Builder!

By now, you know the specific duration depends on various aspects, including the size and complexity of the extension, the availability of materials, the weather conditions, and the efficiency of the construction team. Additionally, factors such as obtaining permits, conducting site preparations, and coordinating with contractors and suppliers can also impact the overall timeline. Trust Dhursan Constructions to handle every aspect of the construction process efficiently and effectively, providing you with peace of mind throughout your project.

Maximise the potential of your home by adding a single-storey extension. With Dhursan’s expertise and attention to detail, you can create a spacious and functional living area that perfectly complements your existing home. Take the first step towards more room and comfort by Contacting us today!

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