Retaining Wall with Fence on Top: Design, Cost, and Regulations in Perth

Combining a retaining wall with a fence is one of the most common boundary solutions in Perth. This guide covers Colorbond integration, WA council rules, costs, and design options for wall-and-fence combinations.

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6 Wall-and-Fence Design Options for Perth

Popular retaining wall and fence combinations for Perth boundary and privacy applications, with indicative costs.

Colorbond on Limestone Wall

The quintessential Perth combination. Steel Colorbond fence panels mounted on extended posts built into a limestone retaining wall. The warm limestone tones paired with Colorbond Surfmist or Woodland Grey is classic Perth.

Wall: $280-$550/m2 + Fence: $100-$180/lm

Pros: Iconic Perth look, low maintenance, colour choice

Colorbond on Concrete Sleepers

Steel Colorbond fence panels bolted to extended H-posts built into the concrete sleeper retaining wall. Clean, modern, and available in dozens of Colorbond colours.

Wall: $250-$500/m2 + Fence: $100-$180/lm

Pros: Low maintenance, contemporary, wind resistant

Colorbond on Block Wall

Fence posts are core-filled into the top course of the block wall. Very strong connection. The block wall can be rendered and painted to match or complement the Colorbond fence colour.

Wall: $200-$400/m2 + Fence: $100-$180/lm

Pros: Very secure, seamless integration

Timber Fence on Limestone Wall

Hardwood or treated pine fence panels on top of a limestone retaining wall. Creates a warm, natural look that blends Perth's traditional limestone with timber fencing.

Wall: $280-$550/m2 + Fence: $120-$200/lm

Pros: Natural aesthetic, privacy, Perth character

Glass Pool Fence on Wall

Frameless glass panels on top of a retaining wall around a pool area. Meets WA pool fencing requirements while maintaining views. Spigots are fixed into the wall cap.

Wall: $250-$500/m2 + Fence: $300-$600/lm

Pros: Unobstructed views, pool compliant

Aluminium Slat on Concrete Wall

Contemporary aluminium slat screening on top of a concrete sleeper or rendered block retaining wall. The combination creates a sleek, modern aesthetic popular in new Perth estates.

Wall: $250-$500/m2 + Fence: $150-$250/lm

Pros: Modern look, adjustable privacy

Perth Council Rules for Wall-and-Fence Combinations

When a retaining wall has a fence on top in Western Australia, each component is assessed separately. The retaining wall is assessed under the Building Act 2011, while the fence is assessed under the Dividing Fences Act 1961 (WA).

Retaining wall over 0.5 metres: Requires a building permit and engineering certification. The engineer must design for the additional wind load from the fence. Remember, WA has the lowest threshold at 0.5m.

Fence height: Measured from the natural ground level on the higher side of the wall. Most Perth council areas allow 1.8m fences without planning approval. However, the combined height from the lower side may trigger neighbour notification or additional approvals.

Boundary considerations: If the wall is on or near the property boundary, you may need to notify your neighbour and discuss cost sharing for the fence component. Getting neighbour agreement in writing before construction avoids disputes later. For more on fencing combined with retaining walls, see our Colorbond fence retaining wall guide.

Compliance Checklist

✓Wall over 0.5m: building permit required (WA)
✓Engineering must account for fence wind load
✓Fence height measured from high side
✓Check combined height from low side
✓Notify neighbour for boundary work
✓WA Building Commission registered builder
✓Written agreement with neighbour
✓Pool fence must meet WA pool barrier code

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Retaining Wall with Fence Costs in Perth

Indicative costs for combined wall-and-fence solutions in Perth.

Colorbond Fence (on wall)

$100 - $180/lm

indicative, fence only

Timber Fence (on wall)

$120 - $200/lm

indicative, fence only

Aluminium Slat Screen

$150 - $250/lm

indicative, fence only

Glass Pool Fence

$300 - $600/lm

indicative, fence only

* Fence costs are in addition to retaining wall costs. See cost guides for wall pricing by material type.

Related Guides & Services

Wall & Fence Services→Council Approval WA→25 Retaining Wall Ideas→Cost Guides→

Wall & Fence FAQs

In Western Australia, the retaining wall and fence are assessed separately. If the retaining wall exceeds 0.5 metres, it requires a building permit and engineering. The fence height is measured from the ground level on the higher side of the wall. Combined wall-and-fence structures on boundaries may require additional planning approval — always check with your local Perth council.

In most Perth council areas, fence height is measured from the natural ground level on the higher side of the retaining wall. A standard 1.8m privacy fence on top of a 1m retaining wall would measure 1.8m from the high side — generally acceptable. However, from the low side it appears as 2.8m, which may trigger neighbour notification requirements.

A retaining wall with Colorbond fence in Perth indicatively costs $350-$700 per lineal metre depending on wall height and material. The wall component typically costs $250-$550/m2, while the Colorbond fence adds $100-$180 per lineal metre. Total cost for a 10m boundary wall with fence: $4,000-$8,000+ indicative.

In Western Australia, boundary fence costs are typically shared between neighbours under the Dividing Fences Act 1961 (WA). However, the retaining wall cost is generally the responsibility of the property owner who benefits from the retaining (usually the higher property). Discuss with your neighbour early and get agreement in writing.

Colorbond fencing can be integrated with most retaining wall types — limestone, concrete sleeper, block, and even some stone walls. The key requirement is that the wall structure must support the additional wind load from the fence. For walls over 0.5 metres in WA, the engineer will design the wall to accommodate the fence load as part of the structural calculations.

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