FAQs | Inner West Home Extensions

Planning a home extension is an exciting step, but it also comes with a lot of questions. From timelines and costs to council approvals and design considerations, homeowners often want clarity before starting their project. At Inner West Home Extensions, we believe in transparency and guidance, ensuring you have all the information you need to make confident decisions.


Below, we’ve answered some of the most common questions about home extensions to help you understand the process, costs, and what to expect. If you don’t see your question here, feel free to reach us - we’re happy to help!

  • How long does a home extension take?

    The timeline depends on the size and complexity of your extension. On average, most home extensions take between three to six months from construction start to completion. A single-storey extension typically takes three to four months, while a second-storey addition can take four to six months due to extra structural work. The planning and approval stage may add another six to twelve weeks, depending on council requirements.


    We provide a clear timeline upfront and guarantee on-time completion, ensuring minimal disruption to your home and lifestyle.

  • Do I need council approval for a home extension?

    Yes, most home extensions require council approval to ensure compliance with local building codes and zoning regulations. The approval process depends on the type of extension and your property’s location.


    Complying Development Certificates (CDC) provide a faster approval process for extensions that meet strict guidelines, while Development Applications (DA) are required for larger or more complex projects, including heritage-listed properties.


    At Inner West Home Extensions, we handle the entire approval process, ensuring your project meets all council and regulatory requirements.

  • Can I live in my home during the extension?

    In most cases, yes. Many homeowners stay in their homes while the extension is being built. We take careful measures to minimize disruption, keeping construction areas secure and separate from your main living spaces whenever possible.


    However, for major structural work—such as second-storey additions or full home renovations—temporary relocation may be recommended. We will discuss this with you during the planning phase to ensure the most convenient solution for your family.

  • How much does a home extension cost?

    The cost of a home extension depends on factors such as size, materials, and structural modifications. A single-storey extension generally starts at $150,000, while a second-storey addition may range from $200,000 to $500,000 or more. Other factors, such as foundation work, high-end finishes, and additional plumbing or electrical installations, can also impact costs.


    We provide fixed-price contracts, so you’ll know exactly what to expect—no hidden costs or budget surprises.

  • Will my home extension match my existing home design?

    Absolutely. Our expert designers ensure that your extension blends seamlessly with your existing home’s architecture, materials, and style. We carefully consider rooflines, exterior finishes, window and door placements, and interior design continuity to maintain a cohesive look.


    For heritage homes or properties with strict council guidelines, we take extra care to preserve the original character while introducing modern functionality.

  • What is included in the cost of a home extension?

    Our home extension projects include:


    • Custom design and architectural planning
    • Council approvals and engineering reports
    • Fixed-price construction with no hidden fees
    • High-quality materials and finishes
    • Complete project management from start to finish

    Everything is included in our fixed-price contracts, so you know exactly what you’re paying for.

  • How can I maximize my budget for a home extension?

    To make the most of your budget:


    • Plan your extension carefully to avoid unnecessary structural changes
    • Choose standard finishes where possible to reduce costs
    • Consider a staged approach, prioritizing essential spaces first
    • Work with an experienced builder to avoid costly mistakes and delays

    We help you design an extension that meets your needs while staying within budget.

  • Will my home extension increase my property value?

    A well-designed home extension can significantly increase your property’s value by adding functional living space, improving the home’s layout, and modernizing outdated areas.


    More bedrooms, open-plan living, and additional bathrooms tend to provide the highest return on investment, particularly in high-demand areas like Inner West Sydney.

  • Do you offer financing options for home extensions?

    While we don’t offer direct financing, many of our clients use:


    • Home equity loans to borrow against their home’s existing value
    • Construction loans designed specifically for renovation projects
    • Offset accounts to reduce interest costs while funding the build

    We can work with your lender to provide all necessary documentation for financing approval.

  • Why should I choose Inner West Home Extensions?

    We specialize exclusively in home extensions, bringing over 40 years of combined experience to every project. Our expertise in local regulations, heritage compliance, and structural design ensures your extension is not only functional and stylish but also built to last.


    • Fixed-price contracts with no hidden costs
    • On-time completion guarantee—if we’re late, we work for free
    • Council approvals handled from start to finish
    • High-quality materials and expert craftsmanship

    We make home extensions stress-free, seamless, and designed to fit your lifestyle.