House Extension Design and Plans in Australia
Thinking about adding space to your home? Nextron Estimating Pty Ltd prepares house extension design drawings and home extension plans for builders, designers and homeowners across Australia. We turn your brief into clear plans and elevations that you can use for pricing, approvals and construction.
What we prepare
- Existing floor plans drawn from your measurements or old plans
- Proposed extension floor plans
- Elevations and sections
- Site plans showing the extension on the block
- Construction drawings for your builder
Extension types
Rear and side extensions, second storey additions, granny flats, and kitchen and living extensions.
Plans that suit your budget
Because we also estimate, we can price your extension plans before you finalise them. See our house extension estimating.
Important note
Nextron Estimating provides drafting and plan preparation. Council approvals, building certification and structural engineering are handled by the relevant licensed professionals. We can draw to their requirements.
How it works
- Send us your brief, sketches and any existing plans.
- We confirm what is included and give a quote and timeframe.
- We prepare the drawings.
- You review them and we make agreed changes.
Frequently asked questions
What do I need to send for home extension plans?
Your sketches or brief, measurements of the existing house, and any plans you already have.
Do you handle council approval?
No. We prepare the drawings. Approvals are lodged by you or your designer, builder or certifier.
Can you price the extension too?
Yes. See our estimating service above.
Get a free quote
Send your brief for a free quote. Email info@nextronestimating.com.au or call +61 468 251 702, or request an estimate.
Related services: construction drawings, architectural drafting, exterior rendering, 3D modelling.
Tailored Extension Designs
We prepare detailed house extension designs that maximise available space while complementing the existing property. Our layouts are designed to improve functionality, natural light, and everyday living.
Every design is carefully developed to meet your project goals while supporting a smooth planning and construction process.
Planning & Approval Support
Our extension design packages include the drawings required for planning applications and construction documentation. We create clear, professional plans that help streamline approvals and reduce unnecessary project delays.
Well-prepared drawings improve communication between homeowners, builders, and local authorities throughout the project.Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
Practical Design Solutions
We create house extension designs that combine aesthetics, practicality, and buildability. Whether you’re adding extra bedrooms, expanding your living area, or creating an open-plan layout, our designs help bring your vision to life.
Our house extension design services provide the confidence to move from concept to construction with clear, accurate, and professionally prepared documentation.