How to choose a block of land in Adelaide

The 10-step framework

1. STEP 1

   Confirm the zoning and permitted use

   Every block in SA sits inside a zone defined by the Planning and Design Code. Zones set what you can build, at what height, at what setback, at what site coverage. Look up the zone on the PlanSA property viewer for the exact address. Zones like Neighbourhood, Suburban Neighbourhood, General Neighbourhood and Housing Diversity Neighbourhood each carry different rules. Do not rely on the sales agent description.

2. STEP 2

   Read the Development Plan overlays

   Overlays sit on top of the zone and add extra rules: Historic Area, Character Area, Bushfire, Native Vegetation, Airport Noise, Regulated Trees, Heritage Place. Overlays materially change what you can build. A Character Area overlay may restrict facade materials and roof pitch. A Bushfire overlay triggers AS 3959 assessment. Check every overlay before committing.

3. STEP 3

   Understand the orientation of the block

   Rectangular blocks with the long axis running east-west allow north-facing living areas across a wide frontage, which is the single strongest driver of energy efficiency and lived comfort. North-south long axis blocks are harder to design well. Corner blocks give more design freedom but often carry higher fencing and streetscape obligations. Battle-axe blocks reduce street presence but can lift privacy.

4. STEP 4

   Get a soil report

   Adelaide soil ranges from reactive clay (large parts of the western and southern suburbs) to sandy loam and rock. Reactive clay drives up footing cost significantly through waffle raft or bored pier requirements. Rock adds excavation cost. Request a geotechnical soil report from the vendor if available; if not, factor a soil test into your due diligence spend before contract goes unconditional.

5. STEP 5

   Check the fall of the block

   A flat block is cheap to build on. A sloping block adds retaining walls, cut and fill, drainage engineering, potentially split-level design and often stormwater complexity. Every metre of fall adds real cost. Walk the block, use a laser level if you can, and ask for a contour survey. See the split-level builders pillar for how slope shapes design.

6. STEP 6

   Identify easements and encumbrances

   Easements for stormwater, sewer, electricity, gas or shared driveway access reduce buildable envelope. A sewer easement running down one side means you cannot build over it and may need to shift the house across the block. Order a title search and a Section 7 statement so all easements and encumbrances are visible before contract.

7. STEP 7

   Confirm services availability and connection cost

   Reticulated water, sewer, electricity, gas (where available), stormwater and NBN. Check each is available at the boundary and get the connection cost from the relevant utility. New estates typically bundle these into the land price. Infill blocks may need upgrades to service capacity. Costs escalate on rural fringe blocks with long service runs.

8. STEP 8

   Get a site cost pre-estimate before signing

   Site costs cover everything between the raw block and a slab ready to build on: earthworks, retaining walls, footings sized for the soil report, connections, drainage, temporary fencing, sediment control. Ask a builder or independent quantity surveyor for a rough site cost estimate for your target design on the specific block before contract exchange. This can swing the total build cost significantly.

9. STEP 9

   Verify the block is titled and settlement ready

   Land in new estates is often sold off the plan with a titled settlement date that can slide. A construction loan cannot progress until title issues. Confirm the current status: titled and ready to settle, titled with a settlement window, or off-plan with an estimated title date. Off-plan blocks are legitimate but carry a real timing risk.

10. STEP 10

    Check the developer levies and covenants

    Developer estates in Adelaide typically apply build covenants: minimum floor area, front fencing rules, driveway material, side setbacks, timeframe to commence building. Read every covenant clause. Some restrict the choice of builder or the roof colour. Others impose completion deadlines with penalty clauses. Non-compliance can trigger legal action from the estate.

FAQs