Inner West Home Builders Sydney
Home Extensions Inner West
Expert ground floor, second storey & rear extensions. Heritage-sensitive designs. Fixed-price quotes
As specialist builders in the Inner West, Downtown Building focuses on delivering exceptional home extensions throughout Sydney's Inner West, including ground floor extensions, second storey additions, and rear extensions in Ashfield, Marrickville, Leichhardt, Summer Hill, and the surrounding suburbs. Since 1998, our licensed builders have successfully completed hundreds of home extensions, with a strong emphasis on heritage-sensitive designs that honor the character of Inner West homes.
Types of Home Extensions We Build:
• Ground Floor Extensions - Seamlessly extend your living space into your backyard, perfect for expanding kitchens, dining areas, or creating open-plan living spaces. Typical cost: $3,000-$5,000/m²
• Second Storey Additions - Maximise your block without sacrificing valuable yard space. Ideal for adding bedrooms, bathrooms, or a master suite, these additions create significant value for your property. Typical cost: $4,000-$6,000/m²
• Rear Extensions - The most popular type of home extensions in the Inner West, perfect for updating modern kitchen and living areas while preserving your home's street presence and heritage character.
• Side Extensions - Perfect for narrow Inner West blocks, these extensions add width to cramped living areas, hallways, or bedrooms while respecting boundary setbacks and heritage overlays.
Our home extensions come with complete Design & Construct services, management of council approvals, expertise in heritage compliance, and fixed-price quotes with no hidden costs. We handle all BASIX and NatHERS requirements, coordinate with Sydney Water and local utilities, and ensure that all work adheres to current NCC and Building Code standards.
Whether you're looking to extend a Federation terrace in Annandale, a Californian bungalow in Ashfield, a Victorian cottage in Marrickville, or a contemporary home in Leichhardt, our experienced builders in the Inner West provide quality construction with complete cost transparency and a focus on heritage sensitivity.
Planning renovations or a home extension? Book a free consultation to discuss your project, receive expert advice on council requirements, and obtain a detailed fixed-price quote for your Inner West home extension.
A basement Rumpus extension with a 2nd storey kitchen addition.
Renovations Inner West
Complete home, kitchen & bathroom renovations. Heritage restoration experts. Transparent fixed price
As specialist builders in the Inner West, Downtown Building focuses on delivering exceptional home extensions throughout Sydney's Inner West, including ground floor extensions, second storey additions, and rear extensions in Ashfield, Marrickville, Leichhardt, Summer Hill, and the surrounding suburbs. Since 1998, our licensed builders have successfully completed hundreds of home extensions, with a strong emphasis on heritage-sensitive designs that honor the character of Inner West homes.
Types of Home Extensions We Build:
• Ground Floor Extensions - Seamlessly extend your living space into your backyard, perfect for expanding kitchens, dining areas, or creating open-plan living spaces. Typical cost: $3,000-$5,000/m²
• Second Storey Additions - Maximise your block without sacrificing valuable yard space. Ideal for adding bedrooms, bathrooms, or a master suite, these additions create significant value for your property. Typical cost: $4,000-$6,000/m²
• Rear Extensions - The most popular type of home extensions in the Inner West, perfect for updating modern kitchen and living areas while preserving your home's street presence and heritage character.
• Side Extensions - Perfect for narrow Inner West blocks, these extensions add width to cramped living areas, hallways, or bedrooms while respecting boundary setbacks and heritage overlays.
Our home extensions come with complete Design & Construct services, management of council approvals, expertise in heritage compliance, and fixed-price quotes with no hidden costs. We handle all BASIX and NatHERS requirements, coordinate with Sydney Water and local utilities, and ensure that all work adheres to current NCC and Building Code standards.
Whether you're looking to extend a Federation terrace in Annandale, a Californian bungalow in Ashfield, a Victorian cottage in Marrickville, or a contemporary home in Leichhardt, our experienced builders in the Inner West provide quality construction with complete cost transparency and a focus on heritage sensitivity.
Planning renovations or a home extension? Book a free consultation to discuss your project, receive expert advice on council requirements, and obtain a detailed fixed-price quote for your Inner West home extension.
Knockdown Rebuild Inner West
Build your dream home on your block. Full management from demolition to handover. Fixed-price quotes
As specialist builders in the Inner West, Downtown Building focuses on delivering exceptional home extensions throughout Sydney's Inner West, including ground floor extensions, second storey additions, and rear extensions in Ashfield, Marrickville, Leichhardt, Summer Hill, and the surrounding suburbs. Since 1998, our licensed builders have successfully completed hundreds of home extensions, with a strong emphasis on heritage-sensitive designs that honor the character of Inner West homes.
Types of Home Extensions We Build:
• Ground Floor Extensions - Seamlessly extend your living space into your backyard, perfect for expanding kitchens, dining areas, or creating open-plan living spaces. Typical cost: $3,000-$5,000/m²
• Second Storey Additions - Maximise your block without sacrificing valuable yard space. Ideal for adding bedrooms, bathrooms, or a master suite, these additions create significant value for your property. Typical cost: $4,000-$6,000/m²
• Rear Extensions - The most popular type of home extensions in the Inner West, perfect for updating modern kitchen and living areas while preserving your home's street presence and heritage character.
• Side Extensions - Perfect for narrow Inner West blocks, these extensions add width to cramped living areas, hallways, or bedrooms while respecting boundary setbacks and heritage overlays.
Our home extensions come with complete Design & Construct services, management of council approvals, expertise in heritage compliance, and fixed-price quotes with no hidden costs. We handle all BASIX and NatHERS requirements, coordinate with Sydney Water and local utilities, and ensure that all work adheres to current NCC and Building Code standards.
Whether you're looking to extend a Federation terrace in Annandale, a Californian bungalow in Ashfield, a Victorian cottage in Marrickville, or a contemporary home in Leichhardt, our experienced builders in the Inner West provide quality construction with complete cost transparency and a focus on heritage sensitivity.
Planning renovations or a home extension? Book a free consultation to discuss your project, receive expert advice on council requirements, and obtain a detailed fixed-price quote for your Inner West home extension.
7 step Inner West Design & Construct | Seamless Renovations
Consultation - We begin with a free consultation to clearly define your project vision, budget parameters, and scope for your Inner West build.
Approvals - Our Design & Construct team manages all necessary Development Applications (DA) and Complying Development Certificates (CDC) with local Inner West councils for smooth, compliant progress.
Consultation - We begin with a free consultation to clearly define your project vision, budget parameters, and scope for your Inner West build.
Site Check - A hands-on site inspection is mandatory to uncover potential heritage constraints or structural risks upfront,
Approvals - Our Design & Construct team manages all necessary Development Applications (DA) and Complying Development Certificates (CDC) with local Inner West councils for smooth, compliant progress.
Consultation - We begin with a free consultation to clearly define your project vision, budget parameters, and scope for your Inner West build.
Approvals - Our Design & Construct team manages all necessary Development Applications (DA) and Complying Development Certificates (CDC) with local Inner West councils for smooth, compliant progress.
Approvals - Our Design & Construct team manages all necessary Development Applications (DA) and Complying Development Certificates (CDC) with local Inner West councils for smooth, compliant progress.
Approvals - Our Design & Construct team manages all necessary Development Applications (DA) and Complying Development Certificates (CDC) with local Inner West councils for smooth, compliant progress.
Pricing - We provide an itemised, fixed-price quote with zero hidden Provisional Sums guaranteed, giving you complete cost certainty before moving forward.
Approvals - Our Design & Construct team manages all necessary Development Applications (DA) and Complying Development Certificates (CDC) with local Inner West councils for smooth, compliant progress.
Approvals - Our Design & Construct team manages all necessary Development Applications (DA) and Complying Development Certificates (CDC) with local Inner West councils for smooth, compliant progress.
Contracts - Review and sign our contract that clearly outlines payment milestones, warranty terms, and project timelines for mutual transparency.
Handover - A detailed walk-through ensures your satisfaction before final payment, followed by the issuance of all compliance certificates and your statutory 6-year structural guarantee for peace of mind.
Build - Experienced custom home builders deliver on-site, managed by expert project managers who ensure the highest Australian Standards and strict adherence to schedule.
Build - Experienced custom home builders deliver on-site, managed by expert project managers who ensure the highest Australian Standards and strict adherence to schedule.
Handover - A detailed walk-through ensures your satisfaction before final payment, followed by the issuance of all compliance certificates and your statutory 6-year structural guarantee for peace of mind.
Build - Experienced custom home builders deliver on-site, managed by expert project managers who ensure the highest Australian Standards and strict adherence to schedule.
Handover - A detailed walk-through ensures your satisfaction before final payment, followed by the issuance of all compliance certificates and your statutory 6-year structural guarantee for peace of mind.
Handover - A detailed walk-through ensures your satisfaction before final payment, followed by the issuance of all compliance certificates and your statutory 6-year structural guarantee for peace of mind.
Handover - A detailed walk-through ensures your satisfaction before final payment, followed by the issuance of all compliance certificates and your statutory 6-year structural guarantee for peace of mind.
The Downtown Building Transparency Guarantee
What we deliver, start to finish
We are your trusted builders in the Inner West and experts in Sydney Design & Construct. By merging our in-house design expertise with reliable local engineers, we handle your home extensions, additions, or custom home projects through a single, accountable, and transparent process. This approach ensures fewer handovers, minimized delays, and a clear point of responsibility from concept to handover.
Real questions. Real answers
Our commitment to Real Answers means we proactively address the exact concerns of Inner West homeowners, especially when it comes to builders in the Inner West. Our process leverages AI-assisted analysis to identify common issues early, such as council requirements or site constraints, ensuring our team provides practical, transparent plans for home extensions and renovations.
Pricing you can trust
At our company, transparent renovation quoting is our policy. We are among the trusted builders in the Inner West, offering no bait and no surprises. For your planning needs, typical costs for home extensions in the Inner West range from A$3,000–A$5,000/m² for ground floor extensions and A$4,000–A$6,000/m² for second-storey additions. These figures serve as guide ranges only. Following a detailed site inspection, we provide a clear, itemised quote that eliminates hidden Provisional Sums, ensuring you can plan your renovations with confidence and maintain an honest budget.
Project Management
Expert Project Management: Certainty on Site. Our experienced builders in the Inner West ensure that every home extension or renovation is completed on time and within budget. We utilize strict scheduling and communication protocols to manage all trades and compliance checks, guaranteeing a smooth workflow so you don't have to worry about a thing.
Why this matters
Why Choose Downtown? As leading builders in the Inner West, we offer Integrated Design & Construct services, Honest Quoting, and a Proven Track Record, ensuring complete cost certainty for your home extensions and renovations. Book a free consultation today, and we'll guide you through a realistic plan with no sales pressure.