Building ‘Up and Under’ – Extend Your House Underneath
When renovating to add space on a property most homeowners in Australia will create an upward or outward extension. Queenslanders on the other hand, have been doing it differently for decades: building a home extension underneath.
If you are planning an extension project in Brisbane or on the Gold Coast any time soon, you might want to consider this rather unique alternative to conventional home extensions.
When should you build underneath?
An extension underneath your existing property is most suitable if you have limited lot space where a single-storey extension will shrink the yard significantly, or exceed the council’s restrictions. It will also work best if your home’s structure isn’t fit to accommodate a second storey.
Do note however, that not all types of property are amenable for this alternative home extension. If your home has a concrete slab, made out completely of brick, or constructed from a combination of brick and veneer; this kind of extension is not for you. But if the property has timber frames built on stumps or brick piers, then building your house extension underneath is a great choice.
Read our helpful article on ‘5 Things To Consider When Planning A Home Extension‘
What are the advantages?
Building an extension underneath will preserve the overall appearance and character of your existing house while adding more livable space to your property. You can just retain the exterior and do minimal interior changes. Then, add a living room, bedrooms, bathroom, and laundry to the new extension.
If your home is located in one of Brisbane’s heritage places, whether it be a local, state, national, or international level; an underneath extension will allow you to comply with existing heritage regulations and council restrictions while adding more rooms to the property.
Check out some of Renovare’s completed projects on our website.
The building procedure
Building an extension underneath your existing home will start by having the contractor lift the house and support it temporarily with steel beams and timber cribs. Then, any brickwork or stumps are removed to give way for the concrete slab and pier holes. Steel columns will be placed on the pier holes and concrete will be poured.
Afterwards, the temporary support will be removed, and the contractor will pour the concrete slab. Walls will be built on the slab and around the property, mimicking the position of the existing house’s outer walls. The last steps will be to create internal walls and build an internal stair on a good location that will connect seamlessly to the upper floor.
Building ‘Up and Under’ with Renovare
Extending your house underneath can be a good option if you’re looking to create more space for your family. Just ensure that the new home extension complies with guidelines from your local council. Also building approval and other necessary permits must be secured before proceeding with any construction works.
To make sure that your home extension project will be successful, you should enlist the help of expert builders like Renovare. We can help transform your home by expertly extending your house underneath with building code-compliant and high-quality works. Our Brisbane and Gold Coast builders specialise in home extensions and renovations, helping homeowners build their dream homes.