Extensions and Renovations
Transform Your Home with Expert Extensions & Renovations in Sydney
Looking to upgrade your lifestyle without changing your address? At TillowBuilt, we specialise in high-quality home extensions and renovations across Sydney. Whether you're expanding your living space, updating outdated interiors, or adding value to your property, our experienced team delivers stunning results tailored to your vision, budget, and timeline. From concept to completion, we handle every detail—so you can enjoy a seamless renovation experience.
Start your dream project today. Get in touch for a free consultation.
Things to look out for…
Key Australian Standards (AS) and Building Codes
1. National Construction Code (NCC) / Building Code of Australia (BCA)
What it is: The BCA is part of the NCC and sets the minimum requirements for construction in Australia.
Why it matters: Every extension or renovation must comply with the BCA for structural integrity, fire safety, ventilation, waterproofing, and energy efficiency.
Tip: Always work with a licensed builder or certifier familiar with the NCC—non-compliance can lead to fines or orders to demolish non-compliant work.
2. AS 1684 – Residential Timber Framing
Covers: Design and construction of timber-framed buildings.
Tip: For extensions involving roof or wall framing, ensure your builder uses span tables and structural details from this standard. Incorrect framing can lead to sagging or unsafe structures.
3. AS 2870 – Residential Slabs and Footings
Covers: Slab and footing design based on site classification (soil type).
Tip: A soil test should be done before any extension. Designing slabs without one can result in cracking or uneven settling.
4. AS 3959 – Construction in Bushfire-Prone Areas
Covers: Building requirements in areas exposed to bushfire risk.
Tip: Check your BAL (Bushfire Attack Level) rating before starting an extension. This may affect materials used for cladding, windows, and roofing.
5. AS/NZS 3500 – Plumbing and Drainage
Covers: All plumbing work must comply with this code.
Tip: Renovating bathrooms or kitchens? Ensure licensed plumbers are used—poor drainage or illegal work can void insurance.
6. Energy Efficiency – Section J (NCC Volume Two)
Covers: Thermal performance of residential buildings.
Tip: Use double glazing, proper insulation, and consider passive solar design to meet energy efficiency standards and reduce long-term costs.
💡 Tips & Tricks for Renovation Success
Check Local Zoning and DA Requirements
Extensions may require a Development Application (DA) or may fall under Complying Development—fast-tracked approval with strict parameters.
Tip: Check with your local council or consult a town planner before designing your extension.
Work With a Certifier
For major extensions, you'll need a Private Certifier or Council Certifier to approve your Construction Certificate and inspect key stages.
Engage a Designer Familiar With the Codes
A draftsperson or architect with local experience ensures your plans comply with setbacks, heights, floor space ratios, and other planning rules.
Use Licensed Trades Only
All electrical, plumbing, and structural work must be done by licensed professionals. Always ask for credentials and check with NSW Fair Trading.
Get a Detailed Scope and Contract
Avoid budget blowouts and disputes. Use a Home Building Contract that includes timelines, variations policy, and materials specification.
