10% Christmas Discount (December Only)

15 Years of Residential Design Expertise

Professional duplex and dual occupancy design for Sydney's Lower North Shore. Maximise your property's potential with expert building designers.

Why Choose Sydney House Design?

With 15 years of experience designing duplexes and dual occupancies across Sydney, we understand how to maximise your site's potential while meeting all council requirements. Whether you're developing for investment or multi-generational living, we deliver designs that work.

  • 15 years of residential design expertise
  • Specialist duplex and dual occupancy designers
  • CDC and DA approval pathways
  • Lower North Shore specialists
  • Hundreds of successful duplex projects
  • Free initial consultation
Duplex design concept plans - Sydney House Design

Duplex Design Options

We design a range of duplex configurations to suit your site and investment goals.

Side-by-Side Duplex

Two dwellings placed adjacent to each other, each with separate street access

Attached Duplex

Two dwellings sharing a common wall with independent entries

Dual Occupancy

Two dwellings on one lot with shared or separate access options

Torrens Title Subdivision

Each dwelling on its own separate title for individual ownership

Duplex Concept Design Package

Our design professionals will assist you through the design and planning process.

from $3,000

Package Includes:

Review local planning requirements and visit and photograph the site
Site the proposed building based on council controls and site topography
Create concept floor plans with 3 complimentary revisions
Prepare 1 x 3D rendered view
Prepare material options
Prepare and present a concept design report and presentation for client sign-off
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15 Years Experience

Trusted residential design expertise

Fast Approvals

CDC & DA pathways available

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100s of Duplexes

Designed across Sydney

10% Christmas Discount - December Only

Request a Free Consultation

Get in touch with our experienced building designers to discuss your duplex project. We'll provide a free initial consultation to assess your site and recommend the best approach.

  • Free site feasibility assessment
  • CDC vs DA pathway recommendation
  • Duplex configuration options
  • Detailed project quote

Or call us directly:

0435 596 972

Get Your Free Quote

Visit our contact page to submit your enquiry, or call us on 0435 596 972

Ready to Start Your Duplex Project?

Take advantage of our 10% Christmas discount this December. Contact us today for a free consultation.

Call 0435 596 972 View All Services