When it comes to increasing the size and functionality of your home, house extensions can be a fantastic option. Whether you need more space for a growing family, want to add value to your property, or simply desire a change, extending your home can meet those needs.
However, the cost of home extensions can often be a concern for many homeowners. Understanding which types of house extensions offer the best return on investment in terms of both functionality and cost-effectiveness is crucial.
In this guide, we will explore the most cost-effective house extensions in Australia, highlighting the types of extensions that provide the best value for your money, the average costs involved, and the factors that influence pricing.
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Most Cost-Effective House Extensions In Australia: A Comprehensive Guide
Single-Storey Extensions
A single-storey extension is one of the most straightforward and budget-friendly types of house extensions. They typically involve expanding the footprint of your home by adding a new room or several rooms on the ground level. Because it doesn’t require any structural changes to the roof or a second storey, a single-storey extension tends to be more affordable compared to a double-storey extension.
Benefits of Single-Storey Extensions:
- Lower Costs: No need for complex structural modifications or additional levels.
- Less Disruption: The work is usually less intrusive, especially if you’re simply expanding an existing room or creating an open-plan area.
- Ease of Planning and Approvals: Single-storey extensions are often easier to get council approval for, especially in suburban areas where height restrictions are more stringent.
Typical Costs:
In Australia, a single-storey extension can cost between $1,500 to $2,500 per square metre, depending on the design, materials used, and the complexity of the work. A 20-square-metre extension, for example, could cost anywhere from $30,000 to $50,000.
Ideal for:
- Additional bedrooms
- Larger kitchens
- Open-plan living spaces
Garage Extensions And Conversions
Garage extensions and conversions are another cost-effective way to add space to your home. Many Australian homes feature an underutilised garage that can be converted into a functional living space. Depending on your needs, the garage can be turned into a home office, gym, additional bedroom, or even a self-contained studio apartment.
Benefits of Garage Extensions:
- Utilises Existing Space: You’re effectively re-purposing an area that’s already part of your home, which reduces the need for new foundations or major structural changes.
- Faster Completion Time: Since you’re working within an existing structure, these projects tend to be quicker to complete.
- Cost-Effective: Generally speaking, converting or extending a garage is cheaper than building a completely new extension from scratch.
Typical Costs:
A garage conversion usually costs between $1,000 and $2,000 per square metre. Converting a standard double garage into a usable living space could cost between $15,000 and $35,000 depending on the scope of the work and finishes chosen.
Ideal for:
- Home office spaces
- Playrooms
- Additional living areas
Decks And Patios
Outdoor living spaces are hugely popular in Australia due to the country’s favourable climate. Adding a deck or patio is one of the most affordable and valuable extensions for homeowners. Whether you build a simple deck at the back of your house or a more elaborate outdoor entertaining area, this type of extension is highly functional and offers a great return on investment.
Benefits of Decks and Patios:
- Affordable Option: Decks and patios are generally less expensive than other types of extensions because they don’t involve significant changes to the internal structure of your home.
- Enhances Outdoor Living: Australia has great weather for outdoor living, so adding a deck or patio can significantly enhance the lifestyle value of your home.
- Increase Property Value: Well-designed outdoor spaces can increase your home’s curb appeal and overall market value.
Typical Costs:
For a basic deck or patio, you can expect to pay between $1,200 and $3,500 per square metre. A mid-range deck or patio can cost anywhere between $15,000 and $30,000, depending on the size, materials used, and complexity.
Ideal for:
- Outdoor dining or lounge areas
- Space for BBQs or entertaining guests
- Poolside areas
Loft Conversions
In homes with enough ceiling height, converting the loft into a functional living space can be an excellent way to add value and extra square footage. A loft conversion typically involves transforming an unused attic into a bedroom, study, or additional living area.
Benefits of Loft Conversions:
- Space Utilisation: Loft conversions make use of existing, underutilised space, so you won’t need to extend your home outwards.
- Increase Property Value: A well-done loft conversion can increase the market value of your property, especially if it adds an extra bedroom or a study.
- Less Expensive Than a Full Extension: Converting the loft is typically more affordable than a full extension that requires new foundations.
Typical Costs:
Loft conversions in Australia can cost between $1,500 and $3,000 per square metre, depending on the complexity of the conversion, roofline modifications, and whether you need to install windows or skylights. A loft conversion typically costs between $30,000 and $70,000 for a small to medium-sized project.
Ideal for:
- Additional bedrooms
- Home offices or studies
- Hobby rooms or playrooms
Side Return Extensions
A side return extension is an ideal solution for properties with narrow side passages. This type of extension extends the footprint of the home along the side of the house, often to expand the kitchen or dining area. Side return extensions are particularly popular in urban areas, where space is limited.
Benefits of Side Return Extensions:
- Maximises Available Space: It’s an effective way to utilise narrow side spaces that are often underutilised.
- Improves Flow of the Home: This extension typically helps to create a seamless flow between indoor and outdoor areas, especially when integrated with a deck or patio.
- Cost-Effective: Side return extensions are generally cheaper than larger extensions because they do not involve major structural changes or demolition work.
Typical Costs:
Side return extensions typically cost between $2,000 and $4,000 per square metre, with a small 10-square-metre extension costing between $20,000 and $40,000.
Ideal for:
- Enlarging kitchens or dining areas
- Creating a light-filled living room
- Adding a home office or workspace
Basement Conversions
If you have a basement that’s underutilised, converting it into a functional living space can add considerable value to your home. While more common in larger urban areas where space is limited, basement conversions are an option for some homeowners who want to create more living space without expanding outwards.
Benefits of Basement Conversions:
- Utilises Unused Space: Basements often sit empty or are used for storage. Converting this space into a living area offers an efficient use of space.
- Increases Property Value: Adding a basement with additional living space is a major selling point for many buyers, particularly in inner-city areas.
- Affordable (Relative to Other Extensions): Basement conversions can be less expensive than double-storey extensions, especially if the space is already finished or close to being livable.
Typical Costs:
Basement conversions can cost anywhere from $2,000 to $4,000 per square metre, depending on the level of finish and the need for waterproofing, insulation, or ventilation. For a medium-sized basement conversion, the cost could be between $40,000 and $100,000.
Ideal for:
- Home theatres
- Extra bedrooms
- Home gyms or entertainment areas
Sunrooms Or Conservatories
A sunroom or conservatory can be a beautiful, cost-effective extension to your home, providing a bright, airy space to relax and enjoy your garden or the outdoors. These rooms are often made of glass, allowing for a high degree of natural light.
Benefits of Sunrooms and Conservatories:
- Natural Light: The abundance of glass makes these spaces bright and welcoming.
- Outdoor Views: Perfect for homeowners who want to enjoy views of their garden or yard, even during poor weather.
- Affordable Addition: Compared to other full-scale extensions, sunrooms and conservatories can be relatively affordable, depending on the size and materials.
Typical Costs:
A basic sunroom or conservatory typically costs between $1,500 and $3,000 per square metre. Depending on the size and materials, the total cost of a sunroom could range from $20,000 to $50,000.
Ideal for:
- Relaxation areas
- Indoor plants or gardens
- Extra living spaces
Conclusion
When considering a house extension in Australia, it’s important to evaluate your needs, the available space, and your budget. Cost-effective extensions such as single-storey additions, garage conversions, and outdoor spaces like decks can significantly improve the functionality of your home without breaking the bank. If you’re looking to add value to your property, these extensions can also offer a good return on investment.
Always remember to get multiple quotes from builders, consult with professionals to ensure the design complies with local regulations, and factor in any ongoing maintenance costs. With the right planning, a well-thought-out extension can be a worthwhile investment for your home.
Frequently Ask Question
How Long Does A Cost-Effective House Extension Take?
The time required for an affordable house extension varies based on the project size and complexity. A simple extension can take anywhere from 2 to 6 months. Larger or more complex projects may take longer due to additional approval processes or structural work, so it’s important to plan accordingly.
Should I Hire An Architect For A Budget-Friendly Extension?
While hiring an architect can be expensive, hiring one can actually help ensure that your extension is well-designed and maximises space efficiently. For budget-conscious projects, consider hiring a drafter or a designer who can provide functional plans without the high cost of a full architectural service.
Is It Cheaper To Extend Up Or Out?
Extending out (single-storey) is typically more cost-effective than extending upwards (two-storey) due to lower foundation and structural requirements. Adding a second storey requires a more complex foundation, additional support beams, and potentially altering the roof structure, which increases the cost. However, if land is limited, extending upwards may be your only option despite the higher cost.