Custom home extension builder since 1964 of all extensions, additions renovations and new homesSecond Storey Extension Builders | Second Floor Additions

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(02) 4577 4912


Unit 1, No.103 Railway Road (North) MULGRAVE NSW 2756

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Second Floor


Second storey extension completed at Castle Hill

First floor extension at Kellyville Ridge

2nd storey extension & renovation at Wahroonga

Wahroonga extension & renovation

Leading Second Storey Extension Builders in NSW

Building a second storey extension is one of the best ways to increase the value of your home. With vacant land limited in the Sydney area, it makes sense to opt for a more economical building solution. O’Mara Constructions, are specialist second storey extension builders in Kellyville, Epping, Rouse Hill, Castle Hill, Pennant Hills and Dural. Offering flexible renovation services, we are happy to work within a wide range of areas to help reduce the inflated building costs around Sydney.

Why build a brand new home when you can achieve the same (if not better) result with your existing property.

Whether you’re interested in a new second story entertainment area for the kids, extra living space for visitors or expanding the family home in general, we can bring your property dreams to fruition in less than a few months.

Hardwood open tread staircase
Arndell 1

Contemporary Building Solutions

If you’re thinking about a 2nd floor renovation and the building cost associated with this type of project, O’Mara Constructions can help put your mind at ease.  We are experts at managing the entire job from start to finish; and looking after all the bits and pieces such as council permits, architectural plans, design solutions, tradesmen and ensuring everything goes to plan efficiently and within budget. In fact, we don’t need you to leave your home while construction takes place. To avoid unnecessary disruptions to your everyday routine, our workers will enter your home via a 2nd storey window or door for a seamless and ‘stress free’ building experience.

New deck using fire retardant treated timber

Frenchs Forest Staircase 2012

Upper Level Bushfire Builder

Do you live in a bushfire prone area? No problem. At O’Mara Constructions we specialise in difficult sites & unusual or unique construction. We regularly build on sloping sites, in high bushfire areas, on flood-affected sites, rural land, narrow blocks, in remote locations or high wind areas. Depending on your unique building requirements, our professional team can use stone, full brick construction, pole homes, mud brick and complex pitched roofs. 

For reputable second storey extension builders in Kellyville, Epping, Rouse Hill, Castle Hill, Pennant Hills and the Dural area, contact O’Mara Constructions today on (02) 4577 4912 or 0419 979 804 for a confidential discussion about your next building project.

Pole home on sloping block
at Wisemans Ferry

Polished floorbaords

Pole home built on sloping site
in bushfire area at Kurrajong