Duplex plans
A duplex is two homes sharing a party wall, and most of the design difficulty sits in that wall: fire separation, acoustic separation, and how far the two plans mirror each other. Mirroring is cheaper to build and simpler to service, but it puts both kitchens and both bathrooms back to back, which is exactly where noise complaints start.
20 editable layouts. Open one in the editor to move walls and rooms, then read the material quantities measured off your own drawing. PlanHome measures; your builder prices it with their rates.
Duplex #1
4 bed · 204 m²
Duplex #2
4 bed · 212 m²
Duplex #3
4 bed · 179 m²
Duplex #4
4 bed · 188 m²
Duplex #5
4 bed · 206 m²
Duplex #6
4 bed · 191 m²
Duplex #7
4 bed · 192 m²
Duplex #8
4 bed · 186 m²
Duplex #9
4 bed · 210 m²
Duplex #10
4 bed · 191 m²
Duplex #11
4 bed · 191 m²
Duplex #12
4 bed · 199 m²
Duplex #13
4 bed · 206 m²
Duplex #14
4 bed · 182 m²
Duplex #15
4 bed · 213 m²
Duplex #16
4 bed · 204 m²
Duplex #17
4 bed · 194 m²
Duplex #18
4 bed · 200 m²
Duplex #19
4 bed · 209 m²
Duplex #20
4 bed · 184 m²
Common questions
- Should both halves of a duplex be identical?
- Mirrored halves are cheaper to build and keep services on a shared run. Where the block is uneven, or one side gets a materially better aspect, breaking the mirror produces two better homes for a higher build cost. Draw both and compare.
- What matters most in the party wall?
- Fire and acoustic performance, which are set by the National Construction Code and detailed by your engineer or designer. Plan around it early: rooms where noise matters, particularly bedrooms, are better placed away from the shared wall on both sides.
Other plan types
Working out what a plan will need in materials? See how the material takeoff works.