Extensions · Add Dwellings

Duplex, Semi-Detached & Granny Flats

Two dwellings from one block — the biggest value lever when your land allows it.

Duplex feasibility frontage

Dual occupancy: more dwellings, more value

Where zoning and land size allow, splitting a block into two dwellings — a duplex, a semi-detached pair, or a house plus granny flat — is often the single largest way to unlock the value already in your land. It can mean two homes to keep and rent, one to keep and one to sell, or a full dual-occupancy development.

  • Duplex & semi-detached (dual occupancy)
  • Secondary dwellings / granny flats (from 60m², min 450m² land)
  • Feasibility, zoning and FSR assessed before design
  • Licensed builder oversight from feasibility to handover
Modern dual occupancy home

We tell you if it stacks up — before you spend

Dual occupancy only creates value when the numbers work. We identify duplex or semi potential, resolve zoning constraints, and clarify the capital pathway first — so you commit to a build that adds value, not one that overreaches your block.

Could your block hold two dwellings?

Check duplex & dual-occupancy potential now.

Check My Block

2026 Planning Context

Current data behind the land-first decision

$3.09T NSW land value

NSW land values reached $3.09 trillion at 1 July 2025, based on more than 66,000 property sales analysed by the Valuer General.

Source: NSW Valuer General.

450sqm dual occupancy standard

NSW Low and Mid-Rise standards use 450sqm minimum lot size, 12m minimum width and 0.65:1 FSR for dual occupancies in eligible areas, subject to zoning, site constraints, local controls and applicable planning provisions.

Source: NSW Planning.

Sydney values under pressure

Cotality reported Sydney dwelling values fell 0.9% in May 2026, making feasibility and approval certainty more important before major capital spend.

Source: Cotality HVI June 2026.