Torrens vs Strata Subdivision for Duplexes in NSW: Which Is Best?

You have built – or are planning – a duplex, and you want each dwelling on its own title so it can be sold or financed separately. In NSW there are two main ways to do that: Torrens title subdivision and strata subdivision. The choice affects your approval pathway, your civil works, your costs, the ongoing obligations of future owners and, ultimately, the sale price of each dwelling.

Too many owners discover the difference at the end of the project, when the decision has effectively been made for them by the design. This guide explains both systems, how the processes differ, what drives the costs, and how to work out which one suits your site – ideally before the slab is poured.

The two title systems in plain terms

Torrens title subdivision

Torrens subdivision divides the parent lot into two (or more) new freehold lots, each with its own boundary line drawn through the land. Each owner holds their lot outright – the land, the building on it, everything within the boundaries. There is no shared legal structure between the two properties beyond any easements or covenants registered on the titles (for example, a party wall easement along the common wall of an attached duplex, or an inter-allotment drainage easement).

Strata subdivision

Strata subdivision keeps the parent parcel intact and creates lots defined by the building itself – typically each dwelling and its courtyard or garage – together with common property (often the shared driveway, common walls or shared services). Registration of the strata plan automatically creates an owners corporation under the Strata Schemes Development Act 2015, of which both lot owners are members. Even a two-lot duplex scheme is a genuine strata scheme, with insurance, record-keeping and (unless properly exempted or managed) the usual strata machinery.

Why the choice matters commercially

In most Sydney markets, Torrens-titled duplex halves command a price premium over strata-titled equivalents. Buyers generally prefer owning their land outright, without an owners corporation, shared insurance or levies tying them to the neighbour. Lenders and valuers treat Torrens lots as standard freehold houses. That premium is the main reason developers push for Torrens subdivision wherever the planning controls allow it.

Strata, on the other hand, is often the pathway of last resort – or of necessity. Where the LEP’s minimum lot size prevents Torrens subdivision, strata may still be achievable. And on some sites, shared elements (a common driveway on a narrow lot, shared stormwater infrastructure) make strata the more honest legal reflection of how the properties actually function.

Permissibility: check the LEP before anything else

This is the threshold question. Councils set minimum lot sizes for subdivision in their LEPs, and many set a specific (often smaller) minimum for subdividing an approved dual occupancy – while others do not, meaning each Torrens lot must meet the full standard minimum lot size. It is entirely possible for a dual occupancy to be permissible on your land while Torrens subdivision of it is not. Some LEPs also restrict strata subdivision of dual occupancies in certain zones. A planner should confirm, for your specific lot and council:

• whether dual occupancy is permissible in the zone;
• the minimum lot size (and any frontage requirement) for Torrens subdivision of a dual occupancy;
• whether strata subdivision of a dual occupancy is permissible; and
• whether the subdivision can be approved with the dual occupancy DA or must follow separately.

How the processes compare

Torrens subdivision process

• Approval – development consent for the subdivision (often sought with the dual occupancy DA, sometimes separately; in limited cases a CDC pathway is available for subdivision associated with complying development).
• Civil and service separation works – each lot must generally stand alone: separate water, sewer and stormwater arrangements, separate electricity and gas, its own driveway or a formalised shared access. Where a rear lot cannot drain to the street, an inter-allotment drainage easement is created.
• Survey – a registered surveyor marks and defines the new boundary (which, for an attached duplex, must align precisely with the party wall) and prepares the plan of subdivision with a s88B instrument creating any easements, party wall provisions and restrictions.
• Sydney Water s73 certificate – confirming servicing for the new lots; almost always a condition precedent to the subdivision certificate.
• Subdivision certificate and registration – the council or registered certifier issues the subdivision certificate once conditions are satisfied, and the plan is lodged with NSW Land Registry Services. New titles issue on registration.

Strata subdivision process

• Approval – development consent (or, where available, a complying development pathway) for strata subdivision of the completed building.
• Construction first – strata lots are defined by the built structure, so the strata plan is prepared from the building as constructed, typically at or near occupation certificate stage.
• Survey and strata plan – a registered surveyor prepares the strata plan showing lots and common property, with schedules of unit entitlement.
• Certificates and registration – a strata certificate is issued by the council or registered certifier, and the plan is registered, creating the owners corporation and the individual lot titles.

What drives the costs of each pathway

Exact fees change and vary by council, so treat this as a map of the cost drivers rather than a price list – and confirm current figures before budgeting.

Torrens cost drivers

• Service separation civil works – usually the biggest item. Fully separating stormwater, sewer and water connections, and constructing inter-allotment drainage where needed, involves real construction cost.
• Sydney Water requirements – the s73 process and any works or connections it requires, plus applicable infrastructure contributions.
• Survey and legal – boundary definition, plan preparation, s88B drafting, easement negotiation where drainage crosses a neighbour.
• Council contributions and fees – development contributions under s7.11/s7.12 where applicable, application and certificate fees.

Strata cost drivers

• Lower civil works – services can, within limits, remain shared as common property, which is precisely why strata often suits constrained sites.
• Plan and administration – strata plan preparation, unit entitlement valuation, initial owners corporation documentation and insurance.
• Ongoing costs for owners – not a development cost, but a value consideration: building insurance through the scheme, any levies, and compliance obligations continue for the life of the scheme.

As a general pattern, Torrens costs more up front and returns more at sale; strata costs less to create and slightly dampens end values while adding ongoing administration. On a two-dwelling project the sale premium frequently outweighs the extra civil cost – where the planning controls allow you the choice at all.

How your site pushes the decision

• Lot size and frontage – below the Torrens minimum, strata may be the only route to separate titles.
• Drainage direction – a rear dwelling that cannot gravity-drain to the street needs an inter-allotment easement for Torrens; under strata, shared drainage can sit within common property, avoiding a neighbour negotiation entirely.
• Access – two independent street frontages or a corner lot favours Torrens; a single shared driveway is workable under either (via easement or common property) but is administratively cleaner as common property.
• Built form – side-by-side attached duplexes with a clean vertical party wall suit Torrens; one-above-another configurations (and manor houses) are strata territory by construction.

Getting the sequencing right

The subdivision strategy should be settled at feasibility stage because it feeds back into the design: boundary position dictates the party wall, service routes must respect the future lots, and the stormwater design must anticipate the easements or common property that will carry it. Retrofitting a Torrens subdivision onto a duplex designed without it – with shared pipes crossing the future boundary in the wrong places – is expensive and sometimes impossible. Your surveyor, civil engineer and planner should agree the target title structure before the architectural design is locked.

Frequently asked questions

Which adds more value – Torrens or strata?

In most Greater Sydney locations, Torrens-titled duplex halves sell for more than comparable strata halves, because buyers avoid the owners corporation and own their land outright. The size of the premium varies by suburb and market conditions – get local agent advice as part of your feasibility.

Can I convert a strata duplex to Torrens later?

Sometimes, but it is a fresh subdivision requiring approval, full service separation, compliance with the LEP’s lot size controls and winding up of the strata scheme. If Torrens is the goal and the controls allow it, do it from the outset – conversion is rarely economical.

Do two-lot strata schemes really need an owners corporation?

Yes – registration of the strata plan creates one automatically, even for two lots. Small schemes can run with minimal formality, and legislation provides some concessions, but shared insurance and basic obligations remain. Buyers price this in, which contributes to the Torrens premium.

When in the project is the subdivision actually registered?

Normally at the end. Torrens plans can progress once subdivision works are complete and conditions (including the Sydney Water s73 certificate) are satisfied; strata plans are prepared from the completed building, typically around occupation certificate stage. Titles issue on registration at NSW Land Registry Services.

Contrive Consultants advises on subdivision strategy, service separation and inter-allotment drainage design for duplex projects across Sydney, working alongside our partner surveyors and planners so the title structure is designed in from day one. See our services, call +61 497 848 111, email info@contriveconsultants.com.au or contact us to talk through your site.