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- February 4, 2026

Sustainova – Home Extension Design Sydney | First Floor Addition Designer Experts
At Sustainova, we specialise in home extension design Sydney and provide expert services as a trusted first floor addition designer Sydney.
We help homeowners expand their living space with smart, compliant, and high-quality extension and addition solutions that improve comfort, functionality, and property value.
From ground-floor extensions to full first-floor additions, our team manages your project from concept to council approval.
Comprehensive Home Extension & First Floor Addition Services
As experienced providers of home extension design Sydney services, we offer complete design and approval support across Greater Sydney.
Our team regularly works with:
- City of Sydney Council
- North Sydney Council
- Northern Beaches Council
- Inner West Council
- Ku-ring-gai Council
- Willoughby Council
- Parramatta Council
- Ryde Council
- Woollahra Council
All designs are prepared to meet local planning and building requirements from day one.
Building Design
Kitchen, Bathroom & Joinery Design
Interior Design
CDC Approval Assistance
Our Home Extension & First Floor Addition Design Services
We offer a complete range of home extension and first floor addition design services Sydney, including:
- Ground Floor Home Extensions
- First Floor Additions & Second Storey Design
- Room Extensions & Living Area Expansions
- Master Bedroom & Ensuite Additions
- Structural Modifications
- Drafting & Construction Documentation
- CDC & Council Approval Assistance
- Sustainable Home Design
From early concepts to builder-ready plans, we ensure every project is efficient and fully compliant.
Why Choose Sustainova for Home Extension Design Sydney?
With years of industry experience, Sustainova is a trusted home extension designer Sydney homeowners rely on and a leading first floor addition designer Sydney.
When you work with us, you benefit from:
- Customised extension solutions
- Detailed and compliant documentation
- Fast turnaround times
- Clear project communication
- End-to-end approval support
- Sustainable and energy-efficient designs
- We work closely with councils, certifiers, and builders to minimise delays and maximise results.
We work closely with councils, certifiers, and builders to minimise delays and maximise results.

Specialists in First Floor Additions & Second Storey Extensions
We design first floor additions and second-storey extensions for:
- Growing Families
- Multi-Generational Homes
- Investment Properties
- Heritage Home Upgrades
- Sloping Block Homes
- Narrow Lot Developments
Our first floor addition designs blend seamlessly with your existing home’s structure and architectural style.
Areas We Serve – Home Extension Design Sydney
We proudly serve clients across Greater Sydney, including:
- Inner West Sydney
- North Shore Sydney
- Eastern Suburbs Sydney
- Northern Beaches
- Mosman
- Parramatta
- Ryde
- Hornsby
- Hills District
- Inner City Sydney
- South Sydney
We also work in the Blue Mountains, Newcastle, and Wollongong.
Let’s Design Your Home Extension or First Floor Addition
Planning a home extension or second-storey addition? Partner with Sustainova — your professional home extension design Sydney and first floor addition designer Sydney specialists.
We manage:
- Design
- Documentation
- Council Approvals
- Technical Requirements
So you can enjoy a smooth and stress-free building process.
About Sustainova – BDAA Accredited Designers
Sustainova is a BDAA-accredited building design practice specialising in home extension design in Sydney and first floor addition design.
Our expertise includes:
- Custom Home Extensions
- Second Storey Additions
- Sustainable Design
- Council Compliance
We are committed to delivering practical, compliant, and beautifully designed homes that stand the test of time.
