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Granny Flat Cost Calculator Sydney

Use this granny flat cost calculator to estimate pricing for a studio, 1 bedroom or 2 bedroom granny flat in Sydney and NSW. Your final quote will depend on site access, ground conditions, approvals, engineering, finishes and service connections.

If unsure, leave this estimate.
Inclusions

Get a more accurate granny flat estimate

Kobo Projects designs and builds custom granny flats across Sydney and NSW, including premium 2 bedroom granny flats, compact studio layouts and high-end secondary dwellings. This calculator is designed to help homeowners understand the main cost drivers before requesting a detailed fixed quote.

Sydney Granny Flat Cost Guide

Granny flat costs in Sydney are usually shaped by the design size, bedroom count, finish level, facade choice, site access, ground conditions, approvals and service connections. A compact studio on an easy block will usually sit lower, while a custom 2 bedroom granny flat with difficult access, slope, rock or a premium facade will usually need a higher allowance.

Project type or cost driverWhat it means for your quote
Studio granny flatUsually the most compact option, best suited to simpler layouts and straightforward service connections.
1 bedroom granny flatA practical mid-range choice with more living space, storage and fitout than a studio.
2 bedroom granny flatOften needs a higher allowance because of extra floor area, more rooms, additional fixtures and a larger service scope.
Brick veneer, rendered or mixed facadeCan lift the final allowance because external wall finish, detailing and installation time all affect the build cost.
Cladding and lightweight finishesCan suit modern granny flat designs and may help balance budget, appearance and construction speed.
Sloping, rock or difficult access sitesCan increase costs through excavation, engineering, drainage, access planning and extra site labour.

For the most accurate price, Kobo Projects reviews your block, access, services, approval pathway and finish selections before preparing a fixed quote.

Sydney Granny Flat Builder Proof

Recent granny flat project types we can help price properly

Every Sydney block is different. Kobo Projects helps homeowners plan granny flats with proper attention to site access, approvals, service connections, facade choices and realistic construction allowances.

Bankstown area

2 bedroom brick veneer granny flat

A strong option for family accommodation or long-term rental use, with focus on side access, privacy, services and matching the existing home.

Liverpool / Fairfield

Custom cladding granny flat

A flexible choice for tighter blocks where lightweight cladding, smart planning and clean finishes can balance budget and street appeal.

Blacktown / Parramatta

Difficult access or sloping block

Useful for sites with narrow access, drainage challenges, rock risk or extra engineering, where a proper site review matters before pricing.

Builder licenceNSW Lic No. 329380C
Local experienceWestern Sydney custom builds
Quote claritySite, services, access and finishes reviewed

Western Sydney Granny Flat Locations

Granny flat builder for Bankstown, Liverpool, Fairfield, Blacktown, Cumberland and Parramatta

Kobo Projects works with homeowners across Western Sydney. These local service areas help homeowners compare granny flat costs, approvals, access and design options in the suburbs where demand is strongest.

Bankstown LGA

Bankstown, Yagoona, Padstow, Revesby, Panania, Bass Hill, Greenacre, Condell Park and surrounding suburbs.

Liverpool LGA

Liverpool, Casula, Prestons, Moorebank, Chipping Norton, Lurnea, Warwick Farm and nearby suburbs.

Fairfield LGA

Fairfield, Cabramatta, Canley Vale, Wetherill Park, Smithfield, Bossley Park, Yennora and surrounding suburbs.

Blacktown LGA

Blacktown, Seven Hills, Doonside, Woodcroft, Rooty Hill, Quakers Hill, Glenwood and nearby suburbs.

Cumberland LGA

Merrylands, Auburn, Greystanes, Guildford, Wentworthville, Lidcombe, Granville and surrounding suburbs.

Parramatta LGA

Parramatta, Westmead, Toongabbie, Ermington, Northmead, Winston Hills, Dundas and nearby suburbs.

For accurate pricing, use the granny flat cost calculator Sydney above, then speak with Kobo Projects about site access, approvals, engineering, finishes and service connections.

Granny Flat Cost FAQs

How much does a granny flat cost in Sydney?

In Sydney, many granny flats can range from the low hundreds of thousands through to higher custom builds depending on size, finishes, access, groundworks, approvals and service connections.

How much does a 2 bedroom granny flat cost in Sydney?

A 2 bedroom granny flat usually costs more than a studio or 1 bedroom design because it needs more floor area, more fixtures, more services and more detailed planning.

What affects granny flat pricing the most?

The biggest cost factors are the size in square metres, finish level, external facade finish, site access, slope, rock excavation, demolition, driveway or path works, landscaping, approvals and service connections.

Is this granny flat calculator a fixed quote?

No. This calculator provides an estimate only. A fixed quote requires a site review, design scope, engineering, approval pathway and confirmation of finishes and inclusions.

Can Kobo Projects build custom granny flats in Sydney?

Yes. Kobo Projects can help with custom granny flat design and construction across Sydney, including premium layouts, higher-end finishes and site-specific building solutions.

Granny flat advice

Latest Granny Flat Insights

Practical Sydney granny flat guides covering costs, approvals, site access, finishes and smart planning decisions before you build.

About This Service

Expert custom granny flat builders Sydney.

Looking to create more available space in your home? From downsizing for retirees, to creating more space for your teenager, being closer to your aging parents, or even a short or long-term rental investment into your property, our granny flat building service is a perfect solution to introduce a whole new area of life into your home.

Kobo Projects specialise in building high-end, premium quality granny flats in Sydney. Our team of expert granny flat builders can set up the right space for you and your loved ones, built perfectly to suit your unique needs. We offer an unmatched level of construction expertise that allows you to transform your backyard into the stylish tiny home of your dreams.

Having transformed dozens of backyards into stunning granny flats over the years, our team has the experience and knowledge to build the best granny flats in Sydney. We know exactly how to make your backyard home shine.

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Add value to your property with a high quality granny flat.

Not only are granny flats great for accommodating for loved ones, but they can make a valuable short term and long-term rental investment opportunity for your home. They also greatly maximise the potential of your yard whilst remaining a smart and cost-effective way to expand your home.

To ensure your granny flat does this, it has to be built properly and by experts in the industry. That's where we come in. With help from Kobo Projects, your granny flat will be designed and built exactly as you envisioned and at the highest quality. Using premium materials and the best tradesmen in the game, we can ensure the quality of your granny flat construction is at the highest standard.

Whatever ideas you have for your granny flat design, our team of highly qualified Sydney granny flat builders will sit down with you to put together an effective solution.

Combining your vision, your budget, and your space, with our knowledge, passion and expertise, you'll get what you want with your granny flat without going over budget or timeline.

Modern backyard with a swimming pool, glass fence, lounge chairs, and an open studio-style granny flat featuring a bed, sofa, and kitchen area.

Why choose us for your granny flat

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    Stylish and unique designs
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    Custom designs drawn to your unique specification
  • 7FF0FB15-CE6C-4E89-B545-0345B9759FF2
    Premium quality materials
  • 7FF0FB15-CE6C-4E89-B545-0345B9759FF2
    Affordable granny flat builders
  • 7FF0FB15-CE6C-4E89-B545-0345B9759FF2
    1 bedroom, 2 bedroom granny flat options
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    Multi-story granny flat options
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    20 years of experience building custom granny flats
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    Work with you to achieve your vision
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    On time, on budget, with no hidden surprises

Turn your dream granny flat into reality with Kobo Projects

With over 20 years of experience in the industry, Kobo Projects are one of the best granny flat builders to put your trust in. Our builders can take your vision and turn it into your dream Sydney granny flat.

All it takes on your part is a vision, a healthy budget, and trust in the best granny flat builders in Sydney, and we will take care of the rest. From design plans, to engineering, council approvals, electrical, plumbing, construction... you name it. We take care of the entire build of your secondary dwelling.

Even if you aren't sure exactly what you are looking for, we can guide you through the process from the start of the design phase to the handover of the keys!

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Our Projects.

Granny Flat Builders Across Sydney Suburbs

Looking to build in Sydney?

Come visit us for a free consultation and see how we can bring your residential or commercial space to life!
Building? Get in touch with kobo today
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Kobo Projects are one of the leading residential and commercial builders in Sydney, taking immense pride in our approachability, quality craftmanship, eye for precision, and client focused approach to building. You can trust Kobo to build your dream.

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