Narrow Block
A family plan with a garage for each dwelling, open plan living flowing to an alfresco area and a laundry with external access.
The Smart Duplex Calculator
Get a clear, step-by-step roadmap to planning your high-quality duplex. Use this smart calculator to estimate your project without the budget blowouts, delays, or unexpected financial headaches.
Turn one block into two well planned homes. Clover Homes designs and builds double storey and two storey duplexes across Sydney, from the first site check through to handover.
The Smart Duplex Calculator walks you through the main cost areas of a duplex project, so you can plan with a clearer picture before you talk to a builder. For the full breakdown of where the money goes, see our guide to the cost of building a dual occupancy in Sydney.
Two Storey Duplex Designs
Every design below can be adapted to your block, your household and your finishes.
- Walk in Robes to Master
- Large Alfresco Area
- Open plan living
- Walk in wardrobe
- Multiple living spaces
- Spacious Open Plan Living
- Walk in Robes to Master
- Spacious Open Plan Living
- Walk in Wardrobe
- Spacious Open Plan Living
- Walk in Robes to Master
- Study Nook
- Large Alfresco Area
- Walk in wardrobe
- Guest Bedrooms
- Open plan living
- Walk in wardrobe
- Multiple living spaces
- Large Alfresco Entertaining area
- Theatre / Bedroom 5 Option
- His & Hers Walk in wardrobes
- Multiple living spaces
- Spacious Open Plan Living
- Walk in Robes to Master
- Study Space
We build it like it's ours
Why Clover HomesWhy a Second Level Works on a Sydney Block
A two storey duplex lets you place two full homes on one lot without giving up the whole yard. These are the reasons owners choose to build up.
- More living space on compact sitesA second level adds bedrooms and living area without consuming outdoor space or narrowing hallways.
- Better separation of zonesBedrooms sit upstairs and stay quiet, while living, dining and entertaining happen downstairs.
- Strong resale and rental appealFamily suburbs often favour two storey layouts because of the extra bedrooms and the separation they provide.
- Flexibility on difficult blocksNarrow or sloping lots frequently work better going up than going out.
- More room outsideBuilding up leaves more of your block free for a garden or alfresco area.
Layouts That Suit Different Sites
The right plan starts with your block, so these are three common starting points.
Corner Block
Dual street entries, two individual facades and private open space on the sunniest side of the lot.
Sloping or View Block
Higher ceilings, additional glazing, skylights and a balcony to capture light and outlook.
Duplex, Dual Occupancy or Townhouse
Dual occupancy is the planning term for two dwellings on one lot, and a duplex is the most common form of it, with two attached homes sharing a dividing wall. Townhouses and duplexes both suit owners who want a second property income, while granny flats and detached dual occupancies suit owners who want a second dwelling for family. Our guide to what a duplex is explains the differences in more detail.
Your New Custom Home, Built With Care
Inside this free guide, you’ll get a clear, step-by-step roadmap to planning and building a high-quality duplex — without the budget blowouts, delays, or legal headaches. Learn how to avoid costly mistakes, choose the right builder, and design a duplex that delivers both lifestyle and long-term value.
Clover Homes' Process
Every project follows the same seven stages, so you always know what comes next.
Discovery
We discuss your vision, your block and your budget.
Design & Tender
We develop concepts and price them through a fixed-price tender.
Plans & Selections
You finalise the design and choose your finishes.
Approvals
We manage the council and certifier paperwork.
Construction
Your duplex is built with weekly progress reports.
Handover
You receive your keys and a walkthrough of your new home.
Warranty
A comprehensive warranty supports you after handover.
FAQs on Building a Double Storey Duplex
What affects the cost of a two storey duplex in Sydney?
Cost depends on site access, slope, demolition, services upgrades, facade complexity, structure, finishes and whether you plan a Torrens subdivision. We begin with a feasibility check and then give you a concept and price guide through our building process, so your budget rests on facts about your site.
What lot size and frontage does a two storey duplex need?
Requirements vary by council and zoning, and many councils look for compliant frontage, private open space and parking that suits the street. We confirm your lot against the relevant council controls, which you can also search on the NSW Planning Portal, before we design anything that cannot be approved.
Is a development application or a CDC faster for a duplex?
A complying development certificate can be faster when your site meets every standard in the state code. When it does not, a development application is the path, and the Planning Portal explains the difference in its guide to complying development.
How long does a two storey duplex project take?
The program varies with approvals, selections, weather and site conditions, so we outline the expected sequence at tender stage. Weekly progress reports then keep you informed once construction begins.
Should I choose Torrens title or strata title?
Torrens title can improve resale in many suburbs because each dwelling has its own land title. Strata title can reduce some upfront costs but adds shared areas and ongoing administration, and we map the approval implications for your address.
Can you build a two storey duplex on a narrow or sloping block?
Yes, on narrow blocks we design efficient layouts with careful stair and party wall placement, and on sloping sites we use split levels and stepped slabs to make the most of the land. Our narrow block designs show how this works.
What is the difference between a dual occupancy and a duplex?
Dual occupancy is the planning term for two dwellings on one lot, and a duplex is a common form of it with two attached homes. If two storeys do not suit your block, our single storey duplex designs are worth a look.
Can I live in one dwelling and rent the other?
Yes, many owners do exactly that, and we can tailor storage, acoustic upgrades and finishes to suit each side. A financial adviser can explain the rental yield and tax position for your circumstances.
How do you manage noise between the two dwellings?
Dividing walls and floors are designed to meet National Construction Code acoustic and fire standards, using approved systems such as full brick or lightweight rated construction. We pay close attention to junctions at slabs, ceilings and rooflines, and confirm the details on site.
What approvals and paperwork do you manage?
We manage the council and certifier paperwork, including development application or CDC documentation, BASIX, engineering and inspections. A dedicated team keeps you updated through every stage, and if you plan to subdivide we can connect you with the right professionals.
Can I knock down my existing home and build a duplex?
Yes, a knockdown rebuild is one of the most common paths we manage, covering demolition, temporary services, design and approvals through to construction.
How do I compare two storey duplex builders?
Look at duplex specific experience, how the builder handles CDC and DA approvals, what the price actually commits to and who supervises the site. Our 12-point guide to choosing a duplex builder covers the full list.
Where We Build
Hornsby • Ku-ring-gai • Northern Beaches • Strathfield • The Hills Shire Council • Inner West • The Hills • Parramatta • Liverpool • Abbotsford • Burwood • Canterbury • Eastwood • Randwick • Berowra • Mona Vale • Narrabeen • Sutherland Shire • Blacktown • Ryde • Canterbury-Bankstown • Western Sydney growth areas
