Granny Flat Builders Perth
Design, approval, & construction services for fully-contained granny flats.
License No. BC105473.
Custom Granny Flat Builds
Venaso Selections can help turn your unused backyard into a contemporary, functional, and high-quality granny flat. A detached granny flat can be used for family, rented out as an investment property, or used for a separate studio/home office.
As of 2024, ancillary dwellings (granny flats) in Perth up to 70m2 no longer require planning approval. While you’re still required to obtain a building permit and comply with the National Construction Code, this new reform makes it easier than ever to build a granny flat and increase the value of your home. According to CoreLogic/Archistart Granny Flat report, adding a granny flat can increase a home’s value by up to 30%.
Venaso Selections are a renovation and building company (License No. BC105473) specialising in extensions that feel comfortable, functional, and contemporary. Members of MBAWA and HIA, we’re leveraging over a decade of collective experience in Perth’s home extension space to help homeowners design, get approval on, and build self-contained granny flats.



Custom Design
We can customise granny flat builds to accommodate 1 bedroom, 2 bedroom or larger 3 bedroom builds. We’ll customise the finishes and fittings to blend seamlessly with the main house too.

Upfront Pricing
Luxury granny flat builds without the luxury price tags. We can provide affordable home additions in Perth, while ensuring you’re still getting the best fittings and finishes.

High Quality Finishes
Speaking of finishes, we work with Australia’s best suppliers for fittings and finishes - including Fienza, Caeserstone, Adp, Hansgrohem and Abey Australia among others.
Our Granny Flat Designs
Venaso’s design and renovation services are backed by over 100 five-star reviews on Google from local homeowners. We have an in-house team of project managers, designers, and interior designers based here in Perth to bring your granny flat plans to life.
We’ve constructed a number of new granny flats across Perth and WA and can provide 3D renders for all stages of the project.
Get in touch with Venaso Selections to get started.

Perth granny flat sizes & inclusions
We design and build custom granny flats to suit different purposes, whether as a guest house, a private living space for family members, or as a rental. We build 1 and 2 bedroom configurations, complete with dedicated areas for laundry, bathrooms, and a kitchen.
From 40m²
1 Bedroom
• 1 Bedroom
• Bathroom
• Kitchen, Living & Dining Space
• Laundry
• Deck
• Suitable as guest suite, home office, or single occupant
Up to 70m²
2 Bedroom
• 2 Bedrooms
• 2 Bathrooms
• Kitchen, Living & Dining Space
• Laundry
• Deck/Outdoor Space
• Family accommodation or rental investment
Custom
1-4 Bedroom
• Bedrooms
• Bathrooms
• Kitchen, Living & Dining Space
• Laundry
• Deck/Outdoor Space
• Local planning approval required for larger than 70m²
Every build includes:
- Custom 3D design and modelling
- Plumbing and electrical work
- Bathroom appliances and kitchen fixtures
- Energy-efficient design, NatHERS compliant
- Up to 10 year waterproofing guarantee
- Different bedroom configurations
- Lighting installations
- Walls painted
- Council and building application
- 2 year minor defect guarantee
The Granny Flat Building Process
Book Your Consultation
Call us or submit the online form to book a free, no-obligation design consultation with Venaso Selections. We can meet virtually or at our Subiaco and Booragoon showrooms.
Measure & Quote
On-site visit to take measurements, assess property, guidance on compliance with the latest local planning reforms, and then quote outlining all expected costs.
Design Development
Our designers will create a detailed 3D render based on our consultations, replicating the final build down to the choice of finishes, fixtures, and colour palette.
Approval & construction
Once you've signed off on the design, we prepare and submit the necessary paperwork for building permits and continue with construction, through to completion.
Venaso Selections Booragoon
Address: 491 Marmion St, Booragoon WA 6154, Australia
Monday – Friday: 9.00am – 5.00pm
Saturday: 8.30am – 5.00pm
Sunday: 10.00am – 4.00pm
Phone: (08) 6144 0551
Email: sales@venaso.com.au
Venaso Selections Subiaco
Address: Shop 186/55 Salvado Rd, Subiaco WA 6008
Monday – Friday: 9.00am – 5.00pm
Saturday: 8.30am – 5.00pm
Sunday: 10.00am – 4.00pm
Phone: (08) 6144 0551
Email: sales@venaso.com.au
Gallery
Meet The Venaso Selections Team

Sari
Customer Relationship Manager

Ben Shami
Director

Laura
General Manager

Milan
Director & Designer

Kay
Director & Designer

Steve
Designer

Dan
Construction Manager

Drake
Designer
![Agostina[1]-resized Agostina[1]-resized](https://www.venaso.com.au/wp-content/uploads/2026/07/Agostina1-resized.jpeg)
Agostina
Designer
![Joseph[1] Joseph[1]](https://www.venaso.com.au/wp-content/uploads/2026/07/Joseph1.jpeg)
Joseph
Designer

Adam
Scheduling & Trade Coordinator

Christy
Orders & Products Coordinator

Szymon
Admin Assistant
![Millana[1] Millana[1]](https://www.venaso.com.au/wp-content/uploads/2026/07/Millana1.jpeg)
Milana
Admin Assistant

Rebecca
Billing & Accounts
Frequently Asked Questions
What are the size limits and requirements for building a granny flat in Perth?
Properties are required to have a minimum block size of 350m2 in order to have sufficient space for a granny flat. It can be attached to the home, or completely separate – it’s up to you. There is no size limit to home additions – you can build a granny flat without planning approval in Perth that is as small as 20m² or as large as 70m², depending on allowing space on the property. Granny flats with an internal floor size larger than 70m² will require council approval.
Will the granny flat be covered by warranty?
Yes. Vensao Selections offers a 10-year waterproofing guarantee, alongside a 10-year structural guarantee and a 2-year minor defect guarantee as part of our commitment to building and designing high-quality granny flats.
How long will it take to build a granny flat?
The construction process for a granny flat can take between 6-10 weeks – this includes laying the foundation, building the structure, painting, plumbing and electrical work, and installing fixtures and fittings.
As of April 2024, building a granny flat in Western Australia no longer requires planning permission from the local council. However, building approval is still required to ensure a safe and compliant outcome. Our team works to expedite this process, but the time required for building approval will still be dependent on the local council’s processes.
Can the granny flat be used for rentals?
Yes. Once built, you can rent out the granny flat to generate an extra source of income, while offering the benefit of a separate living space for your tenants. Building a granny flat is one of the easiest and financially accessible ways to invest in property.








