Understanding the Basics of Land Purchase for Townhouses

Buying land to build townhouses isn't the same as buying land to build a house.

The financing works differently because lenders assess both the land purchase and the construction build as separate but connected approvals. You need a construction loan that covers the land purchase upfront, then releases funds progressively as each townhouse moves through its build stages. Most lenders structure this as a single facility, but the loan amount, the deposit requirements, and the approval conditions all depend on whether you already have development approval when you apply.

In Castle Hill, this matters more than in some other suburbs. The area sits within The Hills Shire Council, which has specific zoning around medium-density housing, particularly near Castle Towers and along Old Northern Road. If the land you're buying is already zoned for multi-dwelling development and comes with an approved DA, lenders treat that differently than raw land where you still need to lodge plans and wait for council approval.

How Construction Loans Work for Land and Townhouse Builds

A construction loan for a townhouse project releases funds in stages as the build progresses, and you only pay interest on the amount drawn down at each stage.

Consider a buyer purchasing a block in Castle Hill for townhouse development. They need $800,000 for the land, and the construction cost across two townhouses is estimated at $1,200,000. The lender approves a total loan amount of $2,000,000, but the funds don't get released all at once. The land purchase is funded first at settlement. After that, the builder submits claims at each stage of construction—slab down, frame up, lock-up, fixing, and practical completion—and the lender releases funds according to the progress payment schedule. Until the builder requests the next stage payment, the borrower only pays interest on what's already been drawn.

This is different from a standard home loan where the full amount is advanced at settlement. The progressive drawdown reduces the interest cost during construction, but it also means you need a registered builder working from a fixed price building contract, and the lender will require progress inspections before releasing each payment.

Most lenders charge a Progressive Drawing Fee for each drawdown, typically between $300 and $500 per claim. Over a five-stage build with two townhouses, that can add $3,000 to $5,000 to your overall cost. Some lenders cap the number of drawdowns or charge a flat fee instead, so it's worth comparing how each structures their progress payment finance.

Development Approval and How It Affects Your Loan Application

Lenders prefer land that already has council approval for the number of dwellings you plan to build.

If you're buying land in Castle Hill with an existing DA for two or three townhouses, your construction loan application becomes more straightforward. The lender knows the project is approved, the design is locked in, and the main variable is construction risk. But if you're buying land where you still need to lodge a development application, most lenders won't offer full approval until that DA is granted. They might give you conditional approval or finance the land purchase separately while you wait for council plans to be approved, but the construction funding stays on hold.

The Hills Shire Council has been relatively consistent with approvals for dual occupancy and townhouse developments in areas close to transport and shopping precincts, but approval timelines can still stretch to six months or longer depending on the complexity of the design and whether neighbours lodge objections. That delay affects your holding costs. If you own the land but can't start building, you're paying interest on the land loan without any construction progress to show for it.

Some lenders require you to commence building within a set period from the Disclosure Date, often 12 months. If your DA approval takes longer than expected, you might need to renegotiate your loan terms or extend the commencement period, which isn't always guaranteed.

Fixed Price Contracts and Why Lenders Insist on Them

Lenders will not approve construction funding on a cost plus contract for townhouse builds.

A fixed price building contract locks in the total construction cost before the build starts. The builder agrees to complete the project for a set price, and any cost overruns become the builder's problem, not yours. Lenders require this because it limits their risk. They know exactly how much funding the project needs, and they can assess your borrowing capacity based on that fixed amount.

A cost plus contract, where the builder charges for materials and labour plus a margin, leaves the final cost open-ended. If materials go up or the build takes longer than expected, the loan amount might not cover the full project. Lenders won't take that risk on a townhouse development, especially when the borrower isn't an experienced developer.

In Castle Hill, where construction costs for medium-density housing have remained high due to demand for quality tradespeople and materials, a fixed price contract also protects you from mid-build price shocks. Most registered builders in the area will offer fixed price contracts as standard, but you need to confirm that before you sign anything. The contract should also include a detailed progress payment schedule that matches the lender's drawdown stages, otherwise you'll end up chasing variations and approvals mid-build.

What Happens If You Want to Build as an Owner Builder

Most lenders won't approve owner builder finance for townhouse projects unless you're a licensed builder yourself.

The risk is too high. Townhouse construction involves coordinating multiple trades, managing council inspections, and ensuring the build meets all regulatory standards. If you're not a licensed builder, lenders assume the project is more likely to run over time or over budget, and they're not willing to fund that. Even lenders who offer construction loans for owner builders on single dwellings will usually draw the line at multi-dwelling projects.

If you are a licensed builder and want to manage the project yourself, you'll still need to provide detailed plans, a breakdown of costs, and proof that you have the experience to deliver the build. Lenders will also require more frequent progress inspections and may cap the loan amount at a lower percentage of the total project value compared to a build managed by a third-party registered builder.

For most buyers in Castle Hill looking to build townhouses, working with a registered builder under a fixed price contract remains the only realistic path to securing construction funding.

Interest-Only Repayment Options During the Build

You can usually arrange interest-only repayments during the construction phase to keep your costs down while the project is still being built.

During construction, you're not living in the property and you're not generating rental income yet, so making full principal and interest repayments can strain your cash flow. Most lenders allow you to switch to interest-only repayment options for the construction period, which typically runs for 12 to 18 months depending on the build timeline.

Once construction reaches practical completion and the townhouses are ready to settle or rent out, the loan converts to a standard principal and interest loan, or remains interest-only if you're holding the properties as investments and want to maximise your deductions. That conversion is built into the loan structure from the start, so you don't need to reapply or renegotiate terms.

Some lenders also offer the option to capitalise the interest during construction, meaning the interest charges get added to the loan balance rather than paid monthly. That keeps your out-of-pocket costs low during the build, but it increases the total loan amount and the interest you'll pay over the life of the loan. It's worth running the numbers with a broker to see whether paying interest monthly or capitalising it makes more sense for your situation.

How Much Deposit You Actually Need

Lenders typically require a 20% deposit on the total project cost, including both land and construction.

If the land costs $800,000 and the construction costs $1,200,000, the total project cost is $2,000,000. A 20% deposit means you need $400,000 in cash or equity before the lender will approve the loan. That deposit can come from savings, equity in another property, or a combination of both, but it needs to be available before you exchange contracts on the land.

Some lenders will stretch to 15% deposit if you have a strong income and a clean credit file, but anything below that usually triggers lenders mortgage insurance, which can add tens of thousands to your upfront costs. For townhouse developments, LMI premiums are higher than for standard home purchases because lenders see construction projects as higher risk.

If you're using equity from your existing home in Castle Hill to fund the deposit, the lender will value your current property and calculate how much usable equity you have after accounting for their lending cap. Most lenders will lend up to 80% of your property's value without requiring LMI, so if your home is worth $1,500,000 and you owe $600,000, you have roughly $600,000 in usable equity that could go towards the townhouse project deposit.

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