Building on a Sloping or Hinterland Block on the Gold Coast
Sloping and acreage blocks in the Gold Coast hinterland can be built on beautifully, but they need more upfront work: a geotechnical report, a bushfire attack level (BAL) assessment, retaining, and often a suspended slab on piers instead of a slab on the ground. Water tanks are common, and on-site wastewater is needed where there's no sewer. Hampton Homes prices these items at the start so they don't turn up later as variations.
Where we build in the hinterland
Tallebudgera Valley, Currumbin Valley, Mudgeeraba, Tallai, Advancetown, Bonogin, Austinville, Reedy Creek, Guanaba and Tamborine Mountain, among others.
What makes a sloping block different
Geotechnical report. Tells the engineer what the ground is (rock, clay, fill) and how the footings must be designed. On slopes it often decides between piers and a conventional slab.
Suspended slab and piers. Instead of cutting the hill away, the home sits on piers with a suspended concrete slab. It reduces excavation and retaining and keeps the natural fall of the land, with views and breezes to match.
Retaining. Most sloping sites need some retaining for driveways, pools and outdoor living. Taller walls need engineering and approval.
Bushfire (BAL) assessment. Much of the hinterland is in a bushfire overlay. The BAL rating sets the construction standard for glazing, decks, cladding and screens, so it needs to be known before the design is finalised.
Water and wastewater. Rainwater tanks are often required. Where sewer isn't available, an on-site wastewater system must be designed and approved.
Access. Steep driveways, delivery trucks, cranes and concrete pumps all need to be planned.
What it costs
Our published starting budgets apply: $7,500–$9,100 per m² for a luxury lowset home and $7,800–$9,800 per m² for a highset home, including GST. Site work on a slope — retaining, a suspended slab (allow about $800 per m² extra), piers, tanks and wastewater — sits on top and depends on the site. That's why we cost the site properly before you sign: as provisional sums kept to a minimum, not as surprises.
Recent example: The Observatory, Reedy Creek
A 600 m² modern Hamptons-style home on a 2,624 m² sloping block in Reedy Creek. The site needed retaining, a suspended slab on piers, a bushfire (BAL) rated design and water tanks. The Observatory won the 2017 Master Builders Gold Coast award for Individual Home $1.25 million – $2 million.
Before you buy a sloping block
Get a contour survey and a soil test early.
Check the bushfire, landslide and flood overlays.
Confirm sewer, water and power connection points.
Ask your builder for a recent example on a similar slope — and go and see it.
Building in the hinterland? Hampton Homes has been building on the Gold Coast since 1987 (QBCC licence 1 259 278). Call (07) 5525 0722 or see our FAQ page.
