---
title: "Interactive Cost Calculator | DuplexCost"
description: "Calculate your construction and building costs instantly based on location postcode, size in sqm, and finish quality."
source: DuplexCost
sourceUrl: https://duplexcost.com/calculator/
lastUpdated: 2026-07-01
citationUrl: https://duplexcost.com/calculator/
---

# Cost Calculator

Calculate your construction and building costs instantly based on location postcode, size in sqm, and finish quality.

Used to calculate total holding costs, purchase leverage, and development equity margins.

© 2026 DuplexCost. A Hustle Ventures product.

## Duplex Cost & Feasibility Calculator

#### Guides

#### Company

## Key Points

- Cost to Build a Duplex
- CDC Duplex Requirements
- Best Sydney Builders
- Best Melbourne Builders
- Calculator
- Locations
- How We Calculate
- Data Sources
- AI Information
- Our Team

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*Source: [DuplexCost](https://duplexcost.com/calculator/)*