Your backyard is one of your most valuable assets — and right now, it might be doing nothing for you. Whether you’re looking to generate consistent rental income, create a private space for an ageing parent, or give an adult child their independence without leaving home, a granny flat is one of the smartest investments a Sydney homeowner can make.
At Sydney Home Renovation, we’ve been designing and building granny flats across Greater Sydney for over 15 years. We handle everything — from your initial site assessment and council approvals through to construction, final inspection, and handover — so you don’t have to coordinate a dozen different trades and certifiers on your own.
Our fixed-price contracts mean the number we quote is the number you pay. No variations. No surprises. Just a quality granny flat built to NSW standards, backed by a 7-year structural guarantee. Ready to find out what’s possible on your block?
If your Sydney property sits on 450m² or more and you have a freestanding house, there's a strong chance you already meet the basic requirements for a secondary dwelling under the NSW SEPP. That unused lawn or overgrown rear yard could become a fully self-contained one- or two-bedroom granny flat — generating rental income or housing a family member — without touching your main home. A free site assessment will confirm your eligibility in minutes.
Sydney's rental market remains one of the tightest in Australia. A well-built granny flat in suburbs like Parramatta, Blacktown, or Campbelltown can generate $350–$600 per week in rental income, delivering a return that significantly outperforms most other property improvements. If you've been thinking about how to make your property work harder without selling or refinancing, a granny flat is the most direct path available to Sydney homeowners right now.
Multigenerational living is increasingly common across Sydney — and for good reason. A self-contained granny flat gives an ageing parent, returning adult child, or extended family member their own front door, kitchen, and bathroom, while keeping them close. It's the middle ground between "move in with us" and "find your own place" — and it adds permanent value to your property at the same time.
Every month without a granny flat is a month of rental income you're not earning, or a housing problem you haven't solved. Sydney property values mean your block is already working against you if it's underutilised. If any of the above situations sound familiar, a quick conversation with our team costs nothing — and could change what your property does for you permanently.
A detached granny flat is a fully self-contained dwelling built separately from your main home — its own structure, its own entrance, its own utilities connection. This is the most popular configuration across Western Sydney and the Hills District, where block sizes typically allow for the required setbacks. Detached builds offer maximum privacy for both the main household and the granny flat occupant, and they command the strongest rental returns. We design and build detached granny flats from one to two bedrooms, with full kitchen, bathroom, laundry, and living areas.
An attached granny flat shares one or more walls with your existing home, making it an ideal solution for blocks where setback requirements make a fully detached build difficult. Attached configurations are common in Inner West and South Sydney suburbs where lot sizes are tighter. Our design team works with your existing structure to create a seamless addition that feels purpose-built — not like an afterthought. Separate entrances ensure privacy, while shared wall construction typically reduces build costs compared to a fully detached dwelling.
For homeowners who need a compact, cost-effective secondary dwelling — or whose block size limits the footprint available — a studio granny flat delivers a fully functional self-contained space in a smaller package. Open-plan living and sleeping areas, a full bathroom, and a kitchenette make studio configurations ideal for single occupants, short-term rental, or a home office with accommodation. Studio granny flats are also the fastest to approve and build, making them the right choice when timeline is a priority.
A dual-key configuration creates two fully self-contained dwellings under one roof — your main home and a granny flat with a shared internal access point that can be locked from both sides. This setup is increasingly popular with Sydney investors and homeowners who want the flexibility to rent both dwellings independently or use the secondary space as needed. Our team designs dual-key layouts that maximise liveable floor space while meeting all NSW secondary dwelling requirements.
We’ve refined our granny flat process over 15 years of Sydney builds to make it as straightforward as possible for homeowners. Here’s exactly what to expect from first call to final handover.
There’s no shortage of builders in Sydney claiming to do granny flats. Here’s why our clients keep referring their neighbours to us.
A studio granny flat (35–45m²) costs significantly less than a two-bedroom detached dwelling (60–80m²). More floor space means more materials, more labour, and longer build time.
Sloped blocks, poor soil bearing capacity, or difficult access for machinery increases site preparation costs. Flat, accessible blocks in suburbs like Blacktown or Penrith are typically more straightforward than steep sites in hilly areas.
CDC approvals are faster and cheaper than DA processes. If your block requires a DA, allow for additional time and professional fees.
Standard inclusions (tiled bathroom, laminate kitchen, carpet/hybrid flooring) sit at the lower end of the range. Upgraded fixtures, stone benchtops, ducted air conditioning, and premium cladding increase the investment.
Connecting water, sewer, and electrical to a new secondary dwelling involves council and utility fees that vary by location and existing infrastructure.
$90,000 –
$130,000
$120,000 –
$160,000
$150,000 –
$200,000+
These are indicative ranges. Your fixed-price quote will reflect your specific site, design, and inclusions.
Don’t take our word for it — here’s what your neighbours have experienced.
Active NSW Contractor Licence (General Building) issued by NSW Fair Trading. All granny flat construction meets NSW Building Code and SEPP requirements.
$20M public liability insurance. Workers' compensation carried for all on-site personnel. Your property is fully protected throughout the build.
Every granny flat built by Sydney Home Renovation is covered by a 7-year structural guarantee consistent with NSW Home Building Act statutory warranties. If a structural defect is identified within the warranty period, we return and rectify it at no cost to you. We also provide a 2-year warranty on all non-structural defects and workmanship.
15+ years. 4.9 stars from 200+ Sydney homeowner reviews.
Whether you’re ready to start or still in the research phase, the best next step is a free, no-obligation site assessment. We’ll visit your Sydney property, confirm your eligibility, walk you through your options, and give you a clear picture of what’s possible — at no cost and no pressure.
Sydney Home Renovation. Fixed prices. Licensed builders. 15 years of Sydney granny flats. Let’s make your block work for you.
