---
title: "Duplex Development Guides & Cost Articles | DuplexCost"
description: "Explore our comprehensive collection of expert-written duplex and dual occupancy development guides. Covers NSW CDC guidelines, Melbourne ResCode rules, cost models, and floor plan layouts."
source: DuplexCost
sourceUrl: https://duplexcost.com/guides/
lastUpdated: 2026-07-01
citationUrl: https://duplexcost.com/guides/
---

# Duplex Development Guides

Explore our comprehensive collection of expert-written duplex and dual occupancy development guides. Covers NSW CDC guidelines, Melbourne ResCode rules, cost models, and floor plan layouts.

Explore the best dual occupancy floor plans. Compare side-by-side attached layouts and front-and-back detached designs to maximize your land value.

© 2026 DuplexCost. A Hustle Ventures product.

## Best Duplex & Dual Occupancy Builders in Melbourne: ResCode & Price Comparison

## Best Duplex Builders in Sydney: Top Designs & Cost Comparison

## CDC Duplex Requirements NSW: Low Rise Housing Diversity Code & Zoning Guide

## Cost to Build a Duplex in Australia: 2026 Price Guide

## Dual Occupancy Floor Plans & Layouts: Side-by-Side vs. Front-and-Back Designs

#### Guides

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## Key Points

- Cost to Build a Duplex
- CDC Duplex Requirements
- Best Sydney Builders
- Best Melbourne Builders
- Calculator
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- How We Calculate
- Data Sources
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*Source: [DuplexCost](https://duplexcost.com/guides/)*