How much does restumping & reblocking cost in Perth?

2026 Price Guide

Most house restumping jobs in Perth cost $8,400–$27,300

for a full-house restumping or reblocking

In Perth, concrete stumps cost $190–$505 per stump, galvanised or adjustable steel stumps cost $250–$670, and treated hardwood stumps cost $170–$420. Partial restumping (5–10 stumps) runs $2,300–$5,900. A full restump costs $8,400–$16,800 for a 2–3 bed character cottage and $13,650–$27,300 for a standard 3–4 bed Perth home.

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Restumping & Reblocking costs in Perth are up around 4.4%% over the past year, re-verified against 90+ sources in October 2026.

Source: WTD Tradie Price Index · Updated quarterly

Average Full-House Restump in Perth

$18,900

for a standard 3–4 bed home (25–40 stumps)

$190–$505

Concrete stump

$8,400–$16,800

2–3 bed cottage

$13,650–$27,300

Standard 3–4 bed

Partial $2,300Typical $18,900Complex $42,000

Source: whatsthedamage.com.au — 2026 Perth Restumping & Reblocking Cost Guide

Updated October 2026 · Independent pricing · GST included

Restumping or reblocking a house in Perth costs $8,400–$27,300 for most homes with a suspended timber subfloor, or $190–$670 per stump installed. While modern Perth homes are built on concrete slabs, tens of thousands of pre-1965 character homes across Perth's inner rings and Fremantle sit on original jarrah timber stumps that decay at the soil line or suffer subterranean termite damage. Restumping a 2–3 bedroom weatherboard, fibro or brick-and-iron cottage on 15–25 stumps costs $8,400–$16,800 (typically $12,600), while a standard 3–4 bedroom character bungalow on 25–40 stumps runs $13,650–$27,300 (typically $18,900). Partial restumping of 5–10 stumps costs $2,300–$5,900 (typically $3,775).

When subfloor clearance is under 400mm and jarrah floorboards must be lifted inside, complex or two-storey restumping runs $21,000–$42,000 (typically $29,400). Where double-brick walls or concrete slabs subside due to leaking soakwells in Bassendean/Spearwood sand or seasonal movement in eastern Guildford clays, concrete underpinning costs $1,250–$2,950 per pin / m (typically $1,950). Subfloor jarrah bearer or joist replacement adds $125–$355 per m (typically $220/m), and WA local council building permits (BA1/BA2) and structural engineering add $1,250–$4,000 per job (typically $2,300).

Comparing cities, or after the Australia-wide picture? See the national guide: How much does restumping & reblocking cost in Australia?

Quick Answer

Restumping a house in Perth costs $8,400–$27,300 for most character homes ($8,400–$16,800 for a 2–3 bed cottage or $13,650–$27,300 for a standard 3–4 bed home), or $190–$670 per stump installed. Concrete underpinning runs $1,250–$2,950 per pin / m. GST included — verified October 2026. Get free Perth quotes →

Restumping & Reblocking Price List — Perth (2026)

Service	Low	Typical	High
Concrete stump replacement (supply & install)	$190per stump	$335	$505
Galvanised or adjustable steel stump replacement	$250per stump	$440	$670
Treated hardwood timber stump replacement	$170per stump	$275	$420
Partial restumping / spot relevel (5–10 stumps)	$2,300total	$3,775	$5,900
Full house restumping — 2–3 bed weatherboard (15–25 stumps)	$8,400total	$12,600	$16,800
Full house restumping — standard 3–4 bed home (25–40 stumps)	$13,650total	$18,900	$27,300
Complex, low-clearance or two-storey restumping & relevel	$21,000total	$29,400	$42,000
Concrete underpinning (reactive clay subsidence)	$1,250per pin / m	$1,950	$2,950
Subfloor bearer or joist replacement (timber repair)	$125per m	$220	$355
Building permit, engineering & soil report allowance	$1,250per job	$2,300	$4,000

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Prices verified October 2026 · Cross-referenced against 90+ Australian trade pricing sources · See methodology

Prices include GST. Based on Perth metro area, October 2026. Outer suburbs and complex access may vary.

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Perth Restumping & Underpinning: Jarrah Stumps, Character Suburbs & WA Soils

Perth foundation work clusters into three distinct residential markets across the Swan Coastal Plain and Swan Valley:

Inner-Ring Character & Heritage Homes (Mount Lawley, Highgate, North Perth, Leederville, Subiaco, Victoria Park, Bayswater, Maylands, Bassendean): Federation tuckpointed brick homes and inter-war Californian bungalows with suspended jarrah floors on original jarrah stumps. Replacing decayed jarrah blocks with precast concrete stumps ($190–$505 per stump, typically $335) or adjustable galvanised steel stumps ($250–$670 per stump, typically $440) costs $13,650–$27,300 (typically $18,900) for a 3–4 bed home, or $21,000–$42,000 where low clearance requires lifting jarrah boards.
Fremantle, East Fremantle, Palmyra, Cottesloe & Mosman Park: Timber-framed cottages and limestone-footing homes on coastal Spearwood sands and Tamala limestone. Salt air and damp subfloors corrode mild steel and rot old timber stumps — full 2–3 bed cottage restumping runs $8,400–$16,800 (typically $12,600), with jarrah bearer/joist repairs at $125–$355 per linear metre (typically $220/m).
Guildford Clay vs Coastal Sand Subsidence (Swan Valley, Guildford, Midland, Armadale, Gosnells & Coastal Suburbs): Along the Swan and Canning rivers and eastern foothills, reactive Guildford formation clays shrink and swell seasonally, while on sandy coastal blocks leaking soakwells or burst pipes wash away sand beneath double-brick strip footings. Concrete underpinning (or chemical grout/resin injection and screw piers) costs $1,250–$2,950 per pin / linear metre (typically $1,950).
WA Building Permits (DMIRS / Local Council) & Termite Management: Under the Western Australian Building Act 2011, structural restumping and underpinning require a Building Permit (BA1 certified or BA2 uncertified application) from your local government authority, backed by structural engineering drawings ($1,250–$4,000 per job, typically $2,300). Registered building service providers (Building and Energy — DMIRS) are required for permit work over $20,000, with Home Indemnity Insurance (HII) mandatory above $20,000.

What Affects Restumping & Reblocking Costs in Perth

Subfloor clearance under jarrah floors

Accessible subfloors (450mm+ clearance) allow crews to replace stumps from underneath ($8,400–$16,800 for a 2–3 bed cottage; $13,650–$27,300 for a 3–4 bed home). Tight crawlspaces in Mount Lawley, Subiaco or Fremantle cottages where jarrah floorboards must be lifted run $21,000–$42,000.

Precast concrete vs adjustable steel stumps

Precast concrete stumps ($190–$505 per stump, typically $335) are the standard replacement for rotted jarrah blocks on sandy Perth sites. Galvanised or adjustable steel stumps ($250–$670 per stump, typically $440) are preferred on reactive Guildford clay blocks in Bassendean, Guildford and the eastern corridor.

Termite & fungal rot in jarrah bearers

Even though old-growth jarrah is durable, 70+ years of damp subfloor conditions or subterranean termites often damage bearers and joists, adding $125–$355 per linear metre (typically $220/m) to replace.

Limestone & double-brick perimeter footings

Many Perth Federation homes have limestone or double-brick outer walls on shallow footings and timber internal floors on stumps. If the outer brick walls have stepped cracks from soakwell washout or clay movement, concrete underpinning adds $1,250–$2,950 per pin / m (typically $1,950).

WA council building permit & engineering

Structural restumping and underpinning require structural engineering certification (Certificate of Design Compliance) and a local council building permit ($1,250–$4,000 per job, typically $2,300), plus WA Home Indemnity Insurance on residential jobs over $20,000.

Heritage overlays in Fremantle, Subiaco & Vincent

State-registered or municipal heritage properties in the Cities of Vincent, Subiaco, Stirling and Fremantle may require like-for-like visible edge stumps or specific subfloor ventilation clearances.

How to Save Money on Restumping & Reblocking in Perth

Replace all original jarrah stumps in one go ($8,400–$16,800 for a 2–3 bed cottage) if your pre-1960 Perth home has never been restumped — spot-replacing 5–10 stumps ($2,300–$5,900) leaves adjacent 70-year-old timber stumps to fail within a few years.

Ensure every new concrete or steel stump is fitted with a physical AS 3660.1 termite barrier (ant cap) and keep subfloor soil clear of timber offcuts — Perth's sandy soils have extreme subterranean termite pressure.

Before underpinning a cracked double-brick wall in sandy Perth suburbs ($1,250–$2,950 per pin / m), CCTV-check your stormwater soakwells and sewer pipes — sand washout from a collapsed soakwell close to the footing is a leading cause of settlement.

Complete restumping before sanding and polishing jarrah floorboards or renovating kitchens and bathrooms.

On Perth contracts over $20,000, verify your contractor is a WA Registered Building Contractor (DMIRS) and provides Home Indemnity Insurance (HII) before work starts.

Frequently Asked Questions — Restumping & Reblocking Cost in Perth

How much does it cost to restump a house in Perth?

Restumping a house in Perth costs $8,400–$16,800 (typically $12,600) for a 2–3 bedroom character cottage on 15–25 stumps, and $13,650–$27,300 (typically $18,900) for a standard 3–4 bedroom home on 25–40 stumps. Tight-access jobs requiring jarrah floorboards to be lifted or two-storey relevelling cost $21,000–$42,000 (typically $29,400), and partial restumping of 5–10 stumps runs $2,300–$5,900 (typically $3,775).

How much does restumping cost per stump in Perth?

In Perth, precast concrete stumps cost $190–$505 per stump (typically $335), galvanised or adjustable steel stumps cost $250–$670 per stump (typically $440), and treated hardwood timber stumps cost $170–$420 per stump (typically $275), supplied and installed.

Do I need a council building permit to restump a house in Perth?

Yes. Under the WA Building Act 2011, full restumping and underpinning are structural works requiring a Building Permit from your local council, supported by structural engineering drawings and a Certificate of Design Compliance ($1,250–$4,000 per job, typically $2,300). Residential building work over $20,000 also requires a registered builder and Home Indemnity Insurance.

How much does underpinning cost in Perth?

Concrete underpinning for subsided double-brick strip footings or slabs in Perth costs $1,250–$2,950 per pin or linear metre (typically $1,950 per pin / m), plus $1,250–$4,000 for structural engineering, soil testing and the council building permit.

Should I replace old jarrah stumps with concrete or steel in Perth?

Precast concrete stumps ($190–$505/stump) are the most popular replacement for rotted jarrah stumps on Perth's sandy coastal plain because they cannot rot or be eaten by white ants. Adjustable galvanised steel stumps ($250–$670/stump) are recommended on reactive Guildford clay blocks in the Swan Valley, Bassendean and eastern suburbs.

Our Methodology

These are independent estimates from public cost guides, marketplaces and industry rate data, and no tradesperson can influence them, so always get a few quotes. Last reviewed October 2026. Read our full methodology →