Types of Houses: Home Loan Security Considerations

Types of houses commonly described in Australia include detached houses, semi-detached houses, terraces, townhouses, duplex dwellings and apartments. These names describe the home’s physical form. For a home loan, the broker also needs to establish the ownership interest being purchased and the property facts the lender will assess.

A townhouse can share a wall without having shared land. A freestanding home can be part of a strata scheme. Start with what the dwelling looks like, then use the sale documents to establish what the client will own.

Identify Common Types of Houses

The common dwelling names distinguish a standalone building, attached homes and homes within a larger building. This table gives plain descriptions and illustrative examples, before any title or mortgage assessment.

Dwelling name	Physical description	Labelled example
Detached house	A freestanding dwelling, structurally independent of neighbouring homes	One house standing separately from the houses beside it
Semi-detached house	One of a pair of homes attached side by side, usually sharing a wall	The left-hand home in a two-home pair
Terrace or row house	A home in a row of attached dwellings	The middle home in a row of six street-facing homes
Townhouse	A house-like dwelling in a group, commonly over two storeys	A two-storey home with its own entrance in an attached development
Duplex dwelling	One of two dwellings in a building or paired development	One side of a building with two separate homes
Apartment or flat	A self-contained home within a building containing other dwellings	A second-floor home with another dwelling below it

The Australian Bureau of Statistics’ 2021 dwelling classification groups semi-detached homes, terraces and townhouses together. It separates that group from detached houses and flats or apartments. Everyday advertising uses more labels than those broad statistical categories.

“Duplex” and “semi-detached” can describe the same physical pair from different perspectives. The seller might be offering one home or the whole two-dwelling property. Neither word establishes whether there is one title or separate titles.

For a jurisdiction-specific example, New South Wales’ low-rise housing guidance describes dual occupancy as two homes on one lot. Its guidance calls two-storey multi-dwelling forms townhouses and single-storey forms villas. Use the local planning description when recording the approved development type.

What Are the Five Types of Houses?

A simple five-group list is detached houses, semi-detached houses, terraces, townhouses and apartments. Duplexes overlap with those labels, so adding them as a sixth description helps identify paired dwellings. There isn’t a single five-item list that captures every Australian home or ownership arrangement.

Building Type and Architectural Style

A house’s style describes its design or appearance. “Modern” can describe a detached house, terrace or townhouse. Style lists containing 33 different types of houses mix appearance with building form, construction methods or regional names.

For a mortgage file, record the dwelling form separately from construction materials and condition. A style label alone doesn’t establish title boundaries, approved use or lender acceptance.

Separate Dwelling Form From Legal Title

Legal title and the sale contract establish the property interest being purchased, while the dwelling label describes the building. Identify the land or lot included in the purchase. Then establish which areas belong to the lot and which are shared.

In Western Australia, Landgate’s strata guidance explains that owners hold their individual lot and share ownership of common property. The scheme plan determines lot boundaries. In survey-strata schemes, the plan identifies common property separately.

A private-looking courtyard or driveway doesn’t prove that it belongs to the lot. Rights to use an area and ownership of that area are different facts. Ask the client’s conveyancer or solicitor to establish the rights from the registered documents.

Collect the documents that identify those facts:

• The sale contract, including the property description and inclusions.
• A current title search and the registered plan identifying the land or lot.
• Registered dealings affecting the property, including easements and restrictions.
• Relevant strata or community scheme documents where the purchase involves shared property.
• Planning and approval records showing permitted use and the approved dwellings.
• Lease or occupancy documents where the client is purchasing an interest other than ordinary ownership of the land.

Document names and requirements differ by state or territory. As a New South Wales example, the government’s contract guidance lists the title search, registered plan and recorded dealings. It also requires a drainage diagram and current zoning certificate.

Example: Two Homes Advertised as a Duplex

In this hypothetical purchase, a client wants the right-hand home in a duplex. The advertisement shows separate entrances and a fence dividing the gardens. The broker receives a contract identifying one lot in a strata plan.

The correct file description records the attached dwelling and the strata lot being bought. It also identifies the relevant common property and access rights from the plan. An incorrect description would say “separate house on its own land” solely because the client has a private entrance.

If the contract instead covers one lot containing both homes, the broker records two dwellings in the purchase. The lender then assesses that actual property. The home loan security guide explains the separate question of legal security and collateral.

Check the Facts That Affect a Mortgage

Assess a property from its documented use, ownership and physical characteristics before applying the chosen lender’s criteria. A familiar dwelling name cannot settle the mortgage assessment by itself.

Use a property record that makes each of these facts visible:

Fact to record	Evidence or question
Permitted use	Zoning, development consent and approved use match the intended use
Occupancy	Owner occupation, a whole-home tenancy or room-by-room letting is identified
Location	Address, postcode, surrounding land uses and relevant site hazards are recorded
Size	Land area and dwelling area are recorded with their measurement basis
Condition and construction	Building materials, alterations and known defects are described
Access and services	Legal access, shared driveways and available services are established
Number of residences	Every dwelling and its approval status are identified
Valuation	The valuation covers the same interest and improvements described in the contract

Unusual construction adds questions about the building’s permanence, approvals and condition. Multiple residences require a record of how many homes exist, how they are occupied and whether they share one title. Commercial use requires the residential and business uses to be identified separately.

A shared ownership arrangement adds questions about the client’s precise interest and any restrictions on transfer or occupation. Send those ownership documents through the legal review. The lender needs the actual interest being offered for assessment, rather than an assumed whole-property purchase.

Apply each lender’s current criteria to the completed facts. Acceptance conditions and valuation requirements belong to the lender being considered. Don’t treat an acceptable townhouse at one lender as proof that every townhouse qualifies everywhere.

Bulma’s Policy Advisor helps brokers compare lender policy wording for the property facts they have collected. Its answers quote the policy, so the broker can retain the wording with the file notes. Title interpretation and the lender’s final assessment remain separate parts of the transaction.

Route Specialised Properties to the Next Check

Use the specialist property guide when the purchase has features that need more assessment than its dwelling label explains. The category depends on the actual building, ownership interest and approved use.

• An apartment needs the apartment loan assessment when its size, building characteristics or title affect the lender’s security review.
• A rural property needs the rural property home loan guide when acreage, rural use, services or location require separate treatment.
• A tiny home needs the tiny home finance guide when it is moveable, sits on land the client doesn’t own or has a separate installation arrangement.
• A modular or kit home needs the modular home finance guide when off-site manufacture, delivery and construction payments affect the funding sequence.
• A boarding house needs the boarding house finance guide when room-based accommodation and its approved operation affect the finance assessment.

“Modular” describes how a home is made. It doesn’t establish whether the client is buying a completed dwelling with land or funding manufacture before installation. New South Wales’ moveable dwelling guidance also treats manufactured-home installation as a distinct approval question.

A building used for room-based accommodation needs its actual approved category recorded. In New South Wales, boarding house and co-living guidance distinguishes those uses from apartments. A building that looks like a large detached house can therefore require a different assessment because of how it operates.

Before shortlisting a lender, write one property description that identifies the dwelling form, the purchased interest and its approved use. Attach the documents that support it. That gives the next assessment the property the client is actually buying.