There’s a lot to love about older homes. High ceilings, ornate cornices, solid timber floors, deep verandahs and established gardens give them a character that’s hard to find in new builds. They’re often in leafy, well-located suburbs close to schools, shops and transport. It’s no surprise that many buyers fall for a period home the moment they walk through the front door.
But charm can come with hidden costs. Older homes have had decades, sometimes more than a century, to settle, shift and wear. Foundations, stumps, roofs, wiring and plumbing may all need attention, and some of those jobs aren’t cheap. Before you sign a contract, it pays to understand the likely structural costs, including the cost of underpinning or restumping if the inspection turns up signs of foundation movement.
Start with a thorough building inspection
A pre-purchase building inspection is essential for any home, but it’s particularly important for older properties. A qualified inspector will look for structural defects, signs of movement, water damage, rot, pest activity and safety issues.
Don’t rely solely on a standard inspection if something looks concerning. If the report mentions significant cracking, sloping floors or foundation issues, consider getting a structural engineer’s assessment. It costs more up front, but it can reveal whether a problem is cosmetic or serious, and give you a clearer idea of the likely repair bill.
A pest inspection is also worth doing, as termites can cause extensive hidden damage to timber structures.
Foundations, stumps and underpinning
Foundation problems are among the most expensive issues in older homes. Houses built on timber stumps may have stumps that have rotted, sunk or been attacked by termites over time. Brick homes on strip footings can move due to reactive soils, poor drainage or tree roots.
Warning signs include sloping or bouncy floors, doors and windows that stick, cracks in walls running diagonally from door and window corners, and gaps between skirting boards and floors.
Restumping replaces old stumps with new ones, often concrete or steel. Underpinning strengthens or deepens existing foundations, usually for brick or slab homes. The cost of either job varies widely depending on the size of the house, the number of stumps or the length of footings involved, access, soil conditions and the method used. Getting quotes from specialists before you buy can help you negotiate on price or decide whether the property is worth it.
Roofs, walls and moisture
Roofs on older homes may be original slate, terracotta tile or corrugated iron. Over time, tiles crack, flashings deteriorate, sheets rust and gutters fail. Repairs might be minor, or the roof may need replacing altogether.
Brickwork can suffer from deteriorating mortar, rising damp and cracking. Rising damp occurs when moisture is drawn up through walls from the ground, causing peeling paint, salt deposits and decay. Treatments are available but can be costly.
Poor subfloor ventilation and drainage can lead to damp, mould and timber rot. Improving airflow and directing stormwater away from the house can prevent further damage.
Services and hazardous materials
Older homes often have outdated electrical wiring that may not be safe or adequate for modern needs. Rewiring a house is a significant expense but can be essential for safety. Old galvanised water pipes may corrode, and clay sewer pipes can crack or be invaded by tree roots.
Homes built before the late 1980s may contain asbestos in places such as eaves, wet area linings, vinyl flooring and fences. Disturbing it during renovations can be dangerous, and removal must be handled by licensed professionals. Lead-based paint may also be present in older homes.
Budgeting for the unknown
Even with thorough inspections, older homes can hold surprises. Once walls are opened up or floors lifted, new problems sometimes appear. A contingency fund for unexpected repairs is wise.
When working out what you can afford, consider not only the purchase price but also the likely cost of essential structural work over the first few years. Factor these costs into your offer and your loan planning.
Is it still worth it?
For many buyers, the answer is yes. Older homes can offer character, space and location that newer homes can’t match. The key is going in with your eyes open, understanding the likely costs and getting expert advice.
By arranging thorough inspections, seeking specialist quotes for structural work and budgeting realistically, you can enjoy the charm of an older home without being caught out by expensive surprises.
