Inner West Builders Sydney | Home Extensions & Renovations

As specialist home extension builders in Sydney's Inner West, Downtown Building delivers ground floor extensions, second storey additions, and rear extensions throughout Ashfield, Marrickville, Leichhardt, Summer Hill, and surrounding suburbs. Our licensed builders have completed hundreds of home extensions since 1998, specialising in heritage-sensitive designs that respect the character of Inner West homes.

• Ground Floor Extensions - Extend your living space seamlessly 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 losing valuable yard space. Ideal for adding bedrooms, bathrooms, or a master suite. Creates significant value for your property. Typical cost: $4,000-$6,000/m²

• Rear Extensions - The most popular extension type in the Inner West. Perfect for creating modern kitchen and living areas while maintaining your home's street presence and heritage character.

• Side Extensions - Ideal for narrow Inner West blocks. Add width to cramped living areas, hallways, or bedrooms while respecting boundary setbacks and heritage overlays.

Our home extensions include complete Design & Construct services, council approval management, heritage compliance expertise, and fixed-price quotes with zero hidden costs. We manage all BASIX and NatHERS requirements, coordinate with Sydney Water and local utilities, and ensure all work meets current NCC and Building Code standards.

Whether you're extending a Federation terrace in Annandale, a Californian bungalow in Ashfield, a Victorian cottage in Marrickville, or a contemporary home in Leichhardt, our experienced Inner West extension builders deliver quality construction with complete cost transparency and heritage sensitivity.

Planning a home extension? Book a free consultation to discuss your project, receive expert advice on council requirements, and get a detailed fixed-price quote for your Inner West home extension. 

Downtown Building specialises in complete home renovations across Sydney's Inner West. From kitchen and bathroom renovations to full-home transformations and heritage restorations, our licensed renovation builders manage every detail from concept to completion. Serving Ashfield, Leichhardt, Marrickville, Balmain, Summer Hill, Annandale, and throughout the Inner West since 1998.

• Complete Home Renovations - Transform your entire Inner West home with our full-service renovation approach. We manage design, approvals, construction, and all trades to deliver your dream home on time and on budget.

• Kitchen Renovations - Create your ideal kitchen with our expert renovation team. From heritage-style kitchens with period details to contemporary open-plan designs, we handle everything including plumbing, electrical, cabinetry, and finishes.

• Bathroom Renovations - Modernise your bathroom while respecting your home's character. We specialise in heritage bathroom renovations featuring period-appropriate tiles, fixtures, and layouts combined with modern functionality and technology.

• Heritage Home Renovations - Expert renovation of Federation, Victorian, and Edwardian homes throughout the Inner West. We understand heritage requirements, council constraints, and period-appropriate materials and techniques.

• Period Home Restorations - Carefully restore original features including timber floors, ornate ceilings, fireplaces, and decorative elements while upgrading services and improving energy efficiency.

Our in-house Design & Construct team ensures your renovation maintains the character and charm of your Inner West home while incorporating modern functionality, energy efficiency, and contemporary comfort. We handle all council approvals, coordinate all trades, manage heritage compliance, and deliver on time with fixed-price certainty.

Inner West renovation expertise: We understand local council requirements across Ashfield, Marrickville, Leichhardt, and Inner West councils. We navigate heritage overlays, conservation areas, and DA requirements to ensure your renovation is compliant and stress-free.

Ready to renovate? Contact Downtown Building for a free consultation and fixed-price quote for your Inner West renovation project. 

Considering a knockdown rebuild in the Inner West? Downtown Building manages the complete process from demolition to your brand new custom home. Our experienced builders navigate complex Inner West council requirements, heritage considerations, and site constraints to deliver your dream home on your existing block. Servicing Ashfield, Marrickville, Leichhardt, Balmain, and throughout Sydney's Inner West.

A knockdown rebuild offers the opportunity to create a completely custom home designed for modern living while maintaining your established location, existing services, and familiar neighbourhood. It's often more cost-effective than extensive renovations when your home requires significant structural work or doesn't suit your lifestyle needs.

• Site Assessment & Feasibility - We evaluate your block for constraints including heritage overlays, flood zones, site access, and council requirements. We advise on what's achievable within your budget and timeline.

• Design & Development Application - Our in-house designers create your custom home design and manage all DA approvals with local Inner West councils. We handle heritage requirements, BASIX compliance, and all necessary certifications.

• Demolition Management - We coordinate professional demolition contractors, manage asbestos removal if required, arrange all necessary permits, and ensure safe, compliant site clearance.

• Construction & Project Management - Our experienced custom home builders deliver your new home on-site, managed by expert project managers who ensure the highest Australian Standards and strict adherence to schedule.

• Keep your established location and neighbourhood
• No stamp duty (compared to buying elsewhere)
• Design your ideal home from the ground up
• Modern energy efficiency and building standards
• Increased property value
• Better use of your block size and orientation

Typical knockdown rebuild timeline: 12-18 months from approval to completion, including design, council approvals, demolition, and construction. We provide transparent fixed-price quotes with no hidden costs and manage every stage with complete project certainty.

Knockdown rebuild considerations: We navigate heritage constraints, council requirements for Ashfield, Marrickville, Leichhardt councils, site access challenges, and utility connections. Our local expertise ensures your knockdown rebuild proceeds smoothly and compliantly.

Planning a knockdown rebuild? Book a free consultation to discuss your project, understand council requirements, and receive a detailed fixed-price quote for your Inner West knockdown rebuild.