Perth's Granny Flats Specialists
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Perth's Granny Flat Specialists will work with you to build you a superior quality granny flat that is built to your budget, on time and defect free. Our clients get to stay informed every step of the way and can sleep well at night knowing that they are being looked after by professionals who genuinely care.

WE ARE MASTER BUILDERS - we undergo regular education and skills training to keep up with the latest standards and technologies. You can feel confident that your granny flat design and build is being built right and complies with the National Construction Code. We are proud to be a finalist for the Master Builders Western Australia Housing Excellence Awards 2018, in the Ancillary Dwelling category.

A Granny Flat project is an exciting and important endeavour, and we want the process to be as smooth and enjoyable as possible for you. Watch our video to find out how the Perth Granny Flat Specialist Online Client Portal keeps you in touch and well informed during the build process. We are proud to present to you a range of our granny flat design projects over the last 12-18 months.
Services
Perth's Granny Flat Specialist are committed to meeting and exceeding your expectations. This old-world quality mixed with modern business sense and a business size which makes us highly responsive to your needs, places Perth's Granny Flat Specialist very uniquely in the market.
Whilst we offer standard designs, most of our granny flat builds are completely unique and designed to coexist with your existing property. Whether you need an office, a teenager's retreat, accommodation for elderly relatives or a completely separate living space for rental income - we can make it happen!
When it comes to a home, there is no one size fits all. Everyone's perfect granny flat is unique. Take a look at the custom built granny flats below - they've all been designed in consultation with the owners to come up with the ideal granny flat for their needs and backyard. We work with you to build you a superior quality granny flat that is built to your budget, on time and defect free.
As a custom builder, Perth's Granny Flat Specialist can design an Ancillary Dwelling to accommodate all of your needs. We seamlessly manage the entire project from start to finish. We have our unique checklist to ensure even the smallest detail is not missed during the construction process. We never compromise on quality and our Quality Assurance Checklist gives you complete peace of mind.
Yes, we work with you to create a custom design that not only suits your tastes and needs, but your block as well. Yes, we have all the required current insurance policies for Building Works, Workers Compensation and Public Liability insurance. On an average, it takes 10-12 weeks for our granny flats to be built after the initial site works and slab has been completed.
Reviews (5)
Ian Sills
Ian Sills
Jun 21, 2019
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Our experience with Shane Williams was really positive. We appreciated his friendly smile and help backed by many years of experience which resulted in exactly what we wanted in a short period of time.
The workers he used were all friendly, respectful and top quality tradesmen. The result was a quality build that couldn't be faulted.
I would recommend Swan River Constructions for any granny flat project.
Daryl Cook
Daryl Cook
Nov 19, 2017
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Shane and his team have carried out several large and small jobs for my clients, he and his team have been very professional and the quality of the work has been exemplary. I'll be using Swan River Constructions and Shane again.
Vivien Nixon
Vivien Nixon
Oct 13, 2017
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I cant speak highly enough of Shane and his team (especially Mickey).
They were an absolute pleasure to work with. Always on time and stuck to the schedule making our building experience very stress free.
Nothing was too much trouble and any adaptations were discussed professionally and promptly with Shane always available when needed.
Their workmanship is amazing and our finished building is exactly as I had planned.
Pankaj Lehar
Pankaj Lehar
Jul 24, 2017
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It was pleasure to work with Shane, Awesome services at very reasonable price. Will surely look forward to work with them again
David O. Halloran
David O. Halloran
Jun 10, 2015
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Swan river constructions have been a pleasure to deal with. Very professional and reliable. Would recommend them for future works.