Last updated 7.05.2026Published 25.10.2024
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CustomAuthor Michael Agostino

Perth Custom Home Building Costs: A Comprehensive Guide

Forget everything you know about custom home building. This isn’t about selecting from a menu of designs. This is about pure custom home design. We reveal why true custom means starting from absolute zero – no templates, no repeated designs, no compromises. Every home is a singular creation, as unique as a fingerprint.

This comprehensive guide provides a clear understanding of the costs involved in building your dream home in Perth as of 2024 and 2025.

From land costs to construction expenses, we’ll break down the various factors that influence your budget and offer insights to help you make informed decisions throughout your home-building process.

Key Factors Affecting Custom Home Building Costs in Perth

1. Cost of Land in Perth

The first major expense in your custom home project is the land itself. As of March 2025, REIWA reports that the median land price in Perth is $290,000, but this varies significantly depending on lot size:

  • Small lots (less than 300sqm): Median $300,000
  • Medium lots (300 to 450sqm): Median $369,000
  • Large lots (greater than 450sqm): Median $545,000

Land prices in Perth also vary dramatically by suburb:

  • Inner-ring suburbs (e.g., South Perth): Prices can be as much as 10 times higher than the Perth median. For instance, a small lot under 300sqm in South Perth has a median price of $2.05 million.

  • Middle-ring suburbs:

  • Karrinyup: Median $712,500 (ranging from $464,000 for small lots to $1.1 million – $1.4 million for large lots)

    • Willetton: Median $730,000 (ranging from $618,000 for small lots to $1 million for large lots)

  • Outer suburbs:

  • Baldivis: Median $282,000 (ranging from $245,000 for small lots to $365,000 for large lots)

    • Ellenbrook: Median $280,000 (ranging from $205,000 for small lots to $395,000 for large lots)

_ *small lots = under 300sqm, large lots = over 450sqm. For more information on average land prices per Perth suburb, visit_ https://reiwa.com.au/the-wa-market/perth-metro/.

2. Cost of Building in Perth

Perth Home Building Cost Trends 2024-25

Building costs in both Perth and Australia have been increasing dramatically over the last several years due to various factors, including supply chain disruptions, material shortages, and labour constraints.

However, as of mid-2024, building costs in Perth have shown signs of stabilisation. According to a recent update from Rawlinsons Cost Management, the rate of building cost escalation is returning closer to the historic average of 3-5% per annum. Having said this, building costs still remain high compared to historical averages.

As of September 2024, industry experts estimate the cost of building a new production home in Perth to be around $2,200 to $4,100 per square metre. Custom and luxury home construction expenses can often exceed the upper end of the standard cost range, potentially reaching $5,500 per square metre or more for high-end, architecturally designed homes.

3. Permit and Regulatory Fees

When building a custom home in Perth, you’ll need to factor in various permit and regulatory fees. Here’s an overview of the main fees you might encounter, based on the most recent information from the Department of Energy, Mines, Industry Regulation and Safety:

  • Building Permit Fees: Certified application for a Class 1 (residential) building: 0.19% of the estimated value of the building work, but not less than $110.00
  • Occupancy Permit: $110.00 for most applications
  • BCITF Levy: 0.2% of the total contract value for projects over $20,000

4. Design and Architectural Fees

When building a custom home, you’ll encounter a cost that buyers of pre-designed project homes typically don’t face: design and architectural fees. Architects and designers in Perth typically charge their fees in one of three ways:

  • Percentage of Construction Cost: Usually ranges from 8% to 15% of the total construction cost.
  • Fixed Fee: A set amount agreed upon based on the project scope.
  • Hourly Rate: Typically ranges from $150 to $250 per hour.

5. Possible Hidden Costs

When budgeting for your custom home in Perth, be aware of these potential hidden costs:

  • Site Preparation: Can range from a few thousand to tens of thousands of dollars.
  • Utility Connections: Costs between $5,000 and $20,000 or more.
  • Landscaping and Outdoor Features: Can add $10,000 to $50,000 or more to your budget.
  • Changes and Variations: Any alterations to the original plan during construction can lead to additional costs.

Financing Costs and Considerations

Financing a construction loan has different considerations than a standard mortgage.

  • Structure: Interest-only during the building phase and paid in stages.
  • Interest Rates: Slightly higher than standard loans, usually by 0.5% to 1%.
  • Deposit Requirements: Requires a minimum deposit of 20% of the total land and construction costs.

Key Considerations and Tips

  1. Pre-approval: Consider obtaining loan pre-approval before finalising your building contract.
  2. Fixed Price Contract: Opt for a fixed-price building contract to manage financial risk.
  3. Include a Buffer: For unexpected costs that might arise throughout the building process.

How We Help Manage Your Custom Home Budget

At Trendsetter Homes, we’re committed to helping you navigate this process. By handling your entire project from concept to completion, we can help reduce unexpected costs that often arise.

Frequently Asked Questions

How much does it cost to build a custom home in Perth?

Custom home builds in Perth typically range from $4,000 to $7,000+ per square metre. Land costs are separate and vary significantly.

Why does a custom home cost more than a project home?

A custom home is designed from scratch for your specific block and lifestyle. You’re paying for original design thinking and materials chosen for your home rather than a catalogue.