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Granny Flats & Tiny Homes

Custom-designed granny flats and tiny homes built to the highest standards. Add value, rental income, or extra living space to your Melbourne property with a trusted registered builder.

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Custom granny flat built in Donvale, Melbourne by Prime Group Building
Registered Builder • 15+ Years Experience

Melbourne's Trusted Granny Flat Builder

At Prime Group Building, we specialise in designing and constructing high-quality granny flats and tiny homes across Melbourne and greater Victoria. With over 15 years of experience, our registered builder Nick Okelly and team deliver turnkey solutions from concept through to handover.

Whether you're looking to accommodate family members, generate rental income, or simply maximise your property's potential, we create self-contained dwellings that are functional, stylish, and built to last.

  • Custom designs tailored to your block, lifestyle, and budget
  • Permits & approvals — only a building permit needed for 60m² and under
  • Self-contained with kitchen, bathroom, laundry & living areas
  • Energy-efficient builds with premium finishes
  • Compliant with all Victorian building regulations
Completed granny flat interior in Donvale showing quality finishes
End-to-End Service

What's Included in Every Build

While permits and plans are usually organised by the client, we can help manage the process to make it as smooth as possible. We work closely with trusted engineers, architects, and building surveyors that we can recommend to get your approvals sorted efficiently.

For granny flats 60m² and under, only a building permit is required — no planning permit needed. For larger builds over 60m², a planning permit will also be required. Our builds include full plumbing, electrical, insulation, and interior fit-out, all backed by the required builder's warranty.

  • Free initial site visit and design consultation
  • Detailed fixed-price quotation — no hidden costs
  • We can recommend trusted engineers, architects & building surveyors
  • Help managing your permits through to approval
  • All trades coordinated under one registered builder
Why Choose Us

Benefits of Building with Prime Group

Built on reliability and driven by quality — here's why Melbourne homeowners trust us with their granny flat projects.

Registered Builder

Fully licensed and registered builder in Victoria. Your project is protected by proper insurance and builder's warranty.

15+ Years Experience

Over fifteen years of hands-on construction experience across residential and commercial projects throughout Victoria.

Fixed-Price Quotes

Know exactly what you're paying upfront. Our detailed fixed-price quotes mean no surprises or hidden charges during the build.

Council Permits Handled

We manage all planning applications, building permits, and council requirements so you don't have to deal with the red tape.

Our Process

How We Build Your Granny Flat

A straightforward, transparent process from your first enquiry to moving in.

1. Free Consultation

We visit your property, discuss your needs, and assess your site's suitability for a granny flat or tiny home build.

2. Design & Quote

We create a custom design for your granny flat and provide a detailed, fixed-price quotation with no hidden costs.

3. Permits & Approvals

We handle all council planning applications and building permits, keeping you informed at every step.

4. Construction & Handover

Our experienced team builds your granny flat on time and to spec. We do a thorough walkthrough before handing over the keys.

FAQ

Frequently Asked Questions

Common questions about building a granny flat or tiny home in Melbourne.

How much does a granny flat cost to build in Melbourne?

The cost of a granny flat varies depending on size, design complexity, site conditions, and finishes selected. We provide detailed fixed-price quotes after a free site assessment so you know exactly what to expect with no hidden costs. Contact us for an obligation-free consultation and quote tailored to your property.

Do I need a council permit for a granny flat in Victoria?

For granny flats 60m² and under, you only need a building permit — no planning permit is required. For builds over 60m², a planning permit is also needed. Permits and plans are usually organised by the client, but we can help manage the process and work closely with trusted engineers, architects, and building surveyors that we recommend to make it straightforward.

How long does it take to build a granny flat?

Construction typically takes between 12 to 20 weeks depending on the size and complexity of the build. The permit process can add 8 to 12 weeks before construction begins. We provide a clear timeline during the quoting stage and keep you updated on progress throughout.

Can I rent out my granny flat?

Rental options depend on your local council's planning scheme and any conditions attached to your permit. Many granny flats in Victoria are approved for use by a dependent person (family member), though some councils allow broader usage. We can advise on the best approach for your situation during the design phase.

What size granny flat can I build on my property?

The maximum size depends on your property's zoning, lot size, and council regulations. Most granny flats range from 40 to 60 square metres. During our free site visit, we assess your property and advise on the maximum allowable footprint and the best layout for your needs.

Are you a registered builder?

Yes, Prime Group Building is a fully registered builder in Victoria with over 15 years of experience. All our work is covered by the required domestic building insurance and builder's warranty, giving you complete peace of mind throughout your project.

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quote in 60 seconds

Answer a couple of quick questions and we'll come back with a detailed, no-obligation quote.

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No obligation — completely free
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Detailed, transparent pricing
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Fast response — usually same day
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15+ years of building expertise
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Granny Flat / Tiny Home Quote

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Ready to build your granny flat?

Contact us today for a free site visit and consultation. We'll assess your property, discuss your vision, and provide a detailed fixed-price quote.

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