Expand and Add Value with Second Storey Additions in Perth

Give your home the makeover it deserves with a second storey extension or addition by Sertorio Homes. Love your home, but need more room to live? Our 2nd storey extensions or additions are an excellent way to get the features you want without overreaching your budget or having to buy a new house and relocate. Whether you’re wanting to add on a spacious loft, a private parent’s retreat, or even a space where your kids can escape to with their friends, Sertorio Homes’ double storey extensions are the best and most affordable way to completely expand your home’s size.

Our Process for Building Quality 2nd Storey Home Additions and Extensions in Perth

When you rely on Sertorio Homes for your second-storey extension in Perth, we make the entire renovation process as seamless as possible. Our experienced team know how disorienting and stressful the building and renovation process can be, so we take great care to disrupt your home life as little as possible throughout the duration of the addition. To make life easier, you can even live in your home while we’re busy extending your space! Our second storey extension process in Perth is simple and involves the following steps:

1.   Get in Touch
Once you get in touch with our team, we’ll arrange a time for you to have a consult with our building consultants, where we will discuss your needs and wants for your double storey house extensions.

2.   Consultation
The consultation process will involve our team visiting your home and it will cover all your specific needs and wants for your new extension. It’s the perfect time for our team to get to know you, find out how you want your new home to look and feel, and what your budget is.

3.   Design
Using the latest technology and taking into account all the needs and wants for your new build, our experienced team of designers will draw and create a second storey home extension design you’ll love. We’ll even provide you with quality 3D imaging designs to show you exactly what the end result will look like. Once you’re happy with the design, we’ll send it off to the council for approval on your behalf.

4.   Approval
When it comes to second storey extensions, the council and water approval process can take anywhere between a couple 4 to 8 weeks, depending on how busy your council is at the time. Our team will ensure all information is provided upfront to help speed up the approval process.

5.   Let the Build Begin!
The fun part! Our builders will begin your double storey renovation. Throughout this time, you can either choose to stay in your home or live somewhere else, depending on what you prefer. 

6.   Sit Back & Admire Your New Home
Once the build has been completed, all that’s left to do is to sit back and admire your new, beautiful and spacious home.

40 Years of Experience in Building Second Storey Home Additions Across Perth

Trust, quality, reliability and precision are at the heart of how we approach turning your vision into award-winning reality. Whether you have a new home, a character home or a period home, our team of designers and builders have over 40 years of experience in the industry and can build you a quality, dream 2nd storey addition that will match your home’s existing exterior or façade. Whether you require something straight forward- or a more complicated build, we’ve seen and experienced them all and no extension is too difficult for our team to achieve. Find out more about us here.

Second Storey Additions & Extensions – Costs & Pricing

As no two homes are ever the same, we don’t provide a set price for our double storey extensions.  At Sertorio Homes, our team of designers and builders will work within your budget to provide you with a high-quality, beautiful finish that doesn’t break the bank. If you have a strict budget in mind for your renovation, there are many ways to help keep costs low such as buying your own finishes second hand, but our team will always be upfront about costs and pricing, so you’re not left with an unfortunate financial stress once the build is over.

Contact Us

By adding more square metres to your living space, you’ll instantly and dramatically increasing the value of your home. With over 40 years of experience, Sertorio Homes has been trusted to construct some of the most appealing second storey extensions and additions across the state. For a double storey extension quote or to find out more about our second storey additions in Perth, contact us today on 08 9244 1993.

Frequently Asked Questions

By contacting the Sertorio Home’s office by email or phone, a consultant will contact you to arrange a FREE, no obligation visit to your home. This gives us the chance to get to know you and see your house, whilst having a better understanding of how we can help bring your vision and dream to life.
Leave the approval process to us. We will organise approvals with the council and Water Corporation. We will also organise the survey and engineering details.

As you can appreciate, every council has differing needs and procedures for building. Some councils are also inundated with approvals, although we work closely with councils, there may be an occasional delay with approvals. If you feel that the approval process is unusually long, we recommend that you contact the council direct.

If you are adding a second storey extension in Perth, it is advisable to contact your home insurance company to advise them of the renovation prior to the build or construction process. They can advise you on your individual policy requirements.

Each of our two storey house extensions and renovations are unique in their own way. A time frame will be devised based on your current home and proposed renovation. You will be advised prior to signing the contract the allowable working days to complete works.

This is a personal choice. You should speak with your consultant and site manager before making your decision.

Where possible, sub-contractors to Sertorio Homes will keep mess to a minimum. To ensure you end up with the best possible renovation, it may be necessary to carry out demolition. You will need to cover furnishings and it may become unpleasant for a short period of time. Each renovation is unique and it would be best to speak with your Site Manager to determine your individual needs.

No. Sertorio Homes have qualified designers who will draw up your second storey extension design plans in-house. Sertorio Homes do not use other architect designs, as we will draw to specification.

Yes you can. Any changes prior to the contract being signed are made in-house at no extra charge. Any changes after contract signed may result in additional costs onto the contract.

No. Any additional tradespeople not directly working with Sertorio Homes will not be covered by insurance. Any damage that they may cause on the renovation will also not be covered by insurance. Speak with your Site Manager to devise the best course of action prior to employing additional tradespeople.

Yes you can. If you decide to provide your own products, please advise your Consultant prior to materials being purchased. If in doubt, speak with your Consultant. Any changes can affect both the price and scheduling of your job.

Practical completion means the renovation is complete but does not mean it is perfect. In other words, you can live in the house. At time of handover, a Practical Completion inspection will be made by the Sertorio Homes director, and any defects will be noted. These will be rectified within a reasonable time.

Sertorio Homes only carries out two storey house renovations in the immediate Perth metropolitan area. If you are unsure, please contact our office to confirm if we renovate in your area.

What sets us apart

Our slew of awards, satisfied client testimonials and long-standing relationships with our network of tradesmen speak to how well we’ve delivered on our aim — to be Perth’s premier home improvements company.

You’re always first

With Sertorio Homes, your imagination leads the way. We turn your vision into a reality that will exceed your expectations and become a home to cherish for years to come.

Quality. Always.

Sertorio Home believes in the traditional values of care and craftsmanship. We combine this ethos with modern technology to deliver only the best in custom-designed homes.


With Sertorio Homes and our team of trusted experts, you know what you’re getting. We start by offering a no-obligation consultation, and a fixed-price contract that has a 3D walkthrough of your designs thrown in. With us, you’ll see your home realised before it’s built.

Know your renovation

Renovating means trusting your contractors to treat your home with the same care you do. We share our favourite projects so you know what to look forward to with Sertorio Homes.

Renovate or move?

Wondering which option leaves you with the dream home that suits your lifestyle? Take the quiz that helps you weight up your options based on your needs.

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