If you look across Sydney, there’s a clear shift happening.
Second-storey additions are no longer niche; they’re becoming the dominant form of major renovations in many parts of the city.
Where homeowners once extended outward – pushing into backyards and side setbacks – more and more are choosing to build ‘up’ instead.
So what’s driving that shift?
As we explore, it’s not just a design trend; there’s a mix of economic, planning, land size and other issues that are driving the changes.
Land Scarcity
Sydney’s biggest constraint isn’t construction, it’s land.
For many homes, there simply isn’t enough garden into which you can significantly expand your living space.
Added to that, many homeowners don’t want to give up their garden if they can avoid it, whether that’s to maximise outdoor entertaining, or maintain an area for kids to safely play.
As a result, ground-floor extensions are physically constrained, while vertical expansion remains viable. Second-storey additions can effectively double your living space whereas ground floor extensions rarely allow for that degree of expansion.
Better “Bang For Buck”
There is a perception that ground floor extensions are cheaper than adding another floor to your home. However, that’s not usually the case.
Expanding ‘out’ can be more expensive because of the high costs of extensive excavation, site preparation and laying new foundations.
While second storeys may require additional costs like reinforcing the existing home to support the new weight and replacing much of the old roof, these costs are usually less than the alternative.
Lifestyle
Aside from avoiding the loss of garden we mentioned above, adding a second storey suits many homeowners for other reasons.
The upper floor can create a separation between living and sleeping areas and reveal a view that adds significant value to your home.
Because a second storey is more likely to double your living space compared to extensions, other features like ensuite bathroom, walk-in wardrobes, study areas and secondary TV / rumpus rooms become viable.
Planning Restrictions
In NSW, planning rules like setbacks and site coverage/site density can restrict footprint growth making extensions less viable than additions.
Yes, there are also privacy limitations that can limit some aspects of a second storey, but these can be more easily overcome by the judicious placement of windows, use of opaque glass and other design choices that overcome objections by a neighbour.
Overall, extensions often hit planning limits faster than second storeys, meaning that the latter have become the path of least resistance in Sydney.
“Street Appeal” and the “Street Effect”
A well-designed second storey can enhance your home’s look and give it a more commanding presence adding “street appeal“.
While many homeowners aren’t expanding their home with the intention to sell it, knowing that their significant investment into a major renovation has another upside in terms of the value of their home is no bad thing.
The “street effect” also plays a role in home value: once a suburb reaches a tipping point where more homes have second storeys, buyer expectations shift, and homes with two floors become more desirable than those with only one.
Where Extensions Still “Win”
If you need more space and your building footprint doesn’t already cover a large part of your land, extensions are still worth considering.
A larger ground floor gives you the opportunity to create a significant entertaining space, an improved layout and other lifestyle enhancing features that homeowners look for today, like an open plan living/kitchen/dining area flowing onto a spacious outdoor deck.
And if you are looking to share your home with an elderly relative, an extension lets you create accommodation at ground level to minimise any need to climb stairs.
Looking to expand your home?
Addbuild has been designing and building extensions and additions in Sydney for over 45 years and has deep knowledge of what will or won’t suit all the different types of home in the city.
If you need more space and are considering a major renovation, we’d love the opportunity to share our experience with you to help you turn your current layout into your dream home, whether that’s going ‘up’, ‘out’ or both.
As a ‘concept-to-completion‘ builder that can also design and handle the development application process on your behalf, saving you time and money.
We specialise in remodelling, home additions and home extensions, and have unbeatable experience and know-how having completed over 2,000 projects, all in the Sydney area.
Call our office on (02) 8765 1555 or send us a message using our contact form if outside of office hours.
If you are still researching, have a look at our blog, consumer guide to home improvement and masterclass to get further ideas about every aspect of renovating your home.
Searching for inspiration? Have a look at our featured projects and ‘before and after’ photos.