Sena Constructions
Duplex Build Calculator
Free instant estimate
How much will your duplex cost to build?
Answer six quick questions about your block, your design and your finishes. We'll give you an indicative price range based on Sena's Sydney build rates.
- See your estimate straight away, no sign-up needed
- Based on Sydney build costs for site, design and finishes
- Tailored to your choices: block, size, look and extras
6
Quick steps
~2 min
To complete
Free
No obligation
From concept to creation.
Sena Constructions · Sydney
Duplex specialists
Custom duplexes, knockdown rebuilds and dual occupancy across Greater Sydney.
Your indicative estimate
Your duplex build estimate.
Based on your answers and Sena's current Sydney build rates. Request a callback and we'll prepare an accurate quote for your site.
Indicative duplex build cost
Per dwelling:
What's included in your estimate
- Base build and structure for both dwellings
- Facade in your chosen style
- Site costs and preparation (incl. demolition for knockdowns)
- Allowance for slope and site conditions
- BASIX sustainability compliance
- Customisation allowance for your finish level and any extras
Indicative guide only. This is not a quote. Your final price depends on your block, council requirements, design choices and a site assessment. Excludes land, subdivision, and DA/CDC and authority fees.