Should You Subdivide or Just Sell in Adelaide? Why Booking Your Own Land at Zero Distorts the Answer

Should You Subdivide or Just Sell in Adelaide? Why Booking Your Own Land at Zero Distorts the Answer

General information for South Australian landowners only. This is not valuation, tax, legal, financial or planning advice. Route market value and highest and best use questions to a licensed valuer, tax treatment to your registered tax agent or accountant, contracts and title to a qualified SA property lawyer, construction and professional cost estimates to a quantity surveyor (QS) or builder, and zone and division questions to an experienced planning consultant. Statutory fees and tax treatment are updated by financial year and vary with your own facts, so confirm the live position for your own parcel with PlanSA, the ATO and your own advisers before you rely on anything here.

Start with the first line of your own spreadsheet

Open the feasibility you have been carrying around — the one on the back of an envelope, or the one a builder or a friend in the industry put together for you. Find the line marked land.

What is in it? On most owner-built feasibilities for a block the owner already holds, that line is blank, or it holds the price paid for the property when it was bought, or it holds the number printed on a council valuation notice.

Every other line in the table can be right and the bottom line will still mean something different from what you think it means, because that one line sets what the surplus is measured against. A complete feasibility study has a land line the same way it has a construction line, and it is filled in whether or not money changes hands for it.

There is a second reason to look at that sheet again if it was built in an earlier cycle. The land figure in it was set in that cycle's market — and a purchase price records what one party paid on one day, while the figure on a council valuation notice is prepared for its own statutory purpose, on its own basis, at its own date and on its own assumptions. That is why neither of them is answering the question this article is asking. Whether either bears any relationship to market value under highest and best use on your own parcel — and whether the gap is large or small — is for the licensed valuer you engage to say, in a current valuation with its basis and its date stated on it. Separately, the statutory fee schedules on the cost side are re-issued by financial year, so the rates in an older sheet belong to an older schedule. Both ends of the table can move independently, so an older sheet is not slightly stale — it needs to be re-run on current inputs before anyone leans on its bottom line.

"Highest and best use" is not the use you like best

The land line is not filled in with what the block feels like it is worth, or what you would accept from a neighbour. Valuers work to professional standards under which market value is assessed by reference to a property's highest and best use. The test that follows belongs to the valuer profession, not to this article, and it is set out here in plain English rather than in its defined wording — so treat it as an outline to confirm with the licensed valuer you engage, not as a definition settled here. As the profession frames it, the phrase carries four limits at once. A use has to be:

1. Legally permissible — allowed under the planning framework that applies to your parcel.
2. Physically possible — the site, its shape, its services and its constraints have to carry it.
3. Financially feasible — someone has to be able to make it work with numbers, not just with drawings.
4. Maximally productive — of the uses that get through the first three, it is the one that returns the most value. A use can clear every other limit and still not be the highest and best use, because another use that is just as permissible, just as possible and just as feasible is worth more.

On the Adelaide infill parcels we coordinate, the first limit is the one most often left unchecked — the owner has pictured a use without anyone having read the provisions that apply to the parcel against it. That is what we see in practice, not a general rule about how the test resolves: which of the four limits actually binds is parcel-specific, and it is for the licensed valuer and the planning consultant to say, not for an owner or for this article. What a parcel may become is assessed against the zone and the provisions that apply to it under the Planning and Design Code, which you can read for your own address (source: PlanSA, Planning and Design Code). The use you have imagined does not set the ceiling. The parcel's development potential does — as a planning consultant assesses it against the Code, and, where an application is lodged, as the relevant authority determines it. If a planning consultant reads the provisions applying to your parcel as not supporting division — a question for that consultant against the Code, not for an owner reading a zoning map — then there may be no development path worth comparing, and the valuer's opinion of highest and best use will reflect that.

Where the price evidence comes from matters just as much as the concept. Evidence for a divisible allotment comes from comparable transactions in divisible allotments — parcels of similar zoning, area, frontage and constraint, sold in the current cycle. It does not come from what the renovated house across the road sold for, because that sale is priced as a home rather than as development stock. It does not come from a valuation notice, which is prepared for rating and taxing purposes on its own basis. And it does not come from an online estimate.

Assembling that evidence and forming an opinion on it is the work of a licensed valuer, and the result carries a stated basis and a stated date — which is why a lender, an accountant or a co-owner will normally ask for a valuation on that basis rather than for an owner's own figure.

Where the gap actually comes from: the uplift you already own

Here is the mechanism, in one move.

Suppose you book land at zero, because you already own it and no cheque has to be written. The costs in the table are then construction, professional fees, statutory charges, holding costs, finance and selling costs. Whatever the finished lots or dwellings realise above those costs comes out at the bottom and gets called development profit.

But part of that surplus was not created by the project. It is the increase in the value of the land that happened while you held it — through rezoning, through the market, through infill demand arriving in your suburb. You could realise it tomorrow by listing the property as it stands, without lodging a single application.

Book land at zero and that pre-existing gain gets carried into the profit column of a project that did not produce it. You have not made the money twice; you have counted the same uplift twice — once as the value of what you already own, and again as the reward for developing it. Put precisely: nothing has been added up twice on the page, but value you already held is being attributed to the project rather than to the years of holding that actually produced it, and the surplus at the bottom of the table reads as a return on the development when part of it is simply the land turning up in the profit column instead of the cost column.

Booking the historical purchase price does the same thing in a quieter way. It records what the land cost you, not what it is worth to you today if you did nothing. The relevant question in a decision about how to exit is not what you paid. It is what you would give up by not selling.

This is a reasoning point about accounting basis, not a law of nature, and it is fair to argue with. An owner who has no intention of selling under any circumstances, in any market, is not giving up anything measurable by staying, and the opportunity cost framing means less to them. If that is genuinely your position, say so out loud, because it changes which comparison is worth running.

What the argument does not support is a claim about how projects turn out on average. There is no published parcel-by-parcel sample for Adelaide infill that would settle it. The honest version is conditional: once land goes into the table at market value, the gap between developing and simply selling can be far smaller than owners expect, and in some cases it reverses. How it lands on your block is an arithmetic question about your block, and nobody can answer it from the outside.

Like for like: two columns, both run to the same point

The comparison this article recommends running is not "does the project make a profit". It is "which of these two paths leaves more money in my hands after tax". That means two columns, run to the same depth, ending at the same moment. It is a comparison, not a decision rule: the decision itself — along with the tax treatment of each path and the risk you are willing to carry — belongs to you and your advisers, and the article sets out below the circumstances in which the conclusion reasonably goes the other way.

Below is the schedule of line items, deliberately without amounts. The amounts belong to you and your advisers — a licensed valuer for the land line, a quantity surveyor or builder for construction, your registered tax agent for both tax lines, your solicitor for settlement.

• Gross realisation of the finished lots or dwellings: Sale price of the property on a highest and best use basis
• Land, booked at market value under highest and best use: —
• Construction and site works: —
• Professional fees: licensed surveyor, planning, civil engineering, design, coordination: —
• Statutory fees: development application and land division fees: —
• SA Water infill augmentation charges: —
• Other utility augmentation and connection charges: —
• Holding costs through the program: rates, land tax, insurance, finance: Holding costs to settlement
• Selling costs: agent commission, marketing, on each finished lot or dwelling: Selling costs: agent commission, marketing
• Settlement and conveyancing: Settlement and conveyancing
• Tax on the outcome: Tax on the outcome
• After tax, in hand: After tax, in hand

Two rules make the comparison valid.

Run both columns to after tax. A pre-tax development result set against an after-tax sale result is not a comparison, and the two paths may not even attract the same treatment. Selling subdivided lots is not automatically treated as a simple realisation of a capital asset; depending on the facts, the ATO may treat the proceeds as ordinary income, and GST — including whether the margin scheme is available — may be in play (source: ATO — subdividing and combining land, ATO — tax consequences on sales of property, ATO — GST and the margin scheme). Which of those applies to you turns entirely on your own facts and is a question for your registered tax agent. We set out the shape of the issue in GST and CGT on selling subdivided lots in SA; that article maps the territory, it does not answer your case.

Land cannot appear on both sides, and it cannot sit at zero on one side and inside the net proceeds on the other. Either treatment works, but only if it is applied to both columns. Either put land in the left column at market value, in which case the left column's bottom line is a surplus over and above simply selling and the number to compare it with is nothing at all; or leave land out of both columns and compare the two after-tax outcomes directly. Both are internally consistent. Mixing them — land at zero on the left, full net proceeds on the right — is the error this article exists to name.

One shortcut is worth knowing. If a developer has ever put an offer to you, offers of that kind are typically built backwards from an end value, with costs and a required profit taken out — ask the party that made it how theirs was built. Turned around, that number is at least a data point we would want on the table when the land line is being set: it is what one informed party was prepared to pay, net of that party's own costs and required profit, on that party's own view of the site. It is not a valuation, and a licensed valuer's opinion is still the input that decides the line. We explain how that calculation is built in is a developer's offer a fair price.

The benchmark this article argues for: your own after-tax sale result

Developers test projects against a required return on cost, and that test has its place — we cover it in development margin on cost in Adelaide. But that article is about the numerator: how much margin a project needs to clear before it is worth doing. This one is about the denominator: what belongs on the land line underneath it.

For an owner deciding how to exit, we would argue the benchmark is different again. The basis this article argues for is not a conventional industry margin but the after-tax amount you would have in hand from simply selling. Measured that way, a development path that does not clear it is asking you to take on program risk, finance, market timing and a long stretch of your own attention in exchange for an outcome you could have had by signing a listing authority. Whether that trade is worth making is still yours to make with your advisers, on your own tax position and your own tolerance for risk.

The conclusion can go the other way, and it is worth being clear about when:

• The property is thinly traded. If comparable sales are scarce or the parcel is unusual, the sale-side number is an estimate with a wide band around it, and the comparison is less decisive than it looks.
• The use ceiling has been understated. If nobody has had a planning consultant assess the parcel's development potential against the Code, the "simply sell" column may be priced against the wrong highest and best use — which understates the sale side, not the development side.
• The two paths sit in different tax positions. Ownership structure, holding history and the character of the activity can move both bottom lines in ways only your registered tax agent can work out.
• Your tolerance for time and risk is not the market's. Two owners with identical numbers can rationally reach opposite decisions.

So this is a method, not a verdict. It only means anything once it is run on your own numbers, with your own advisers filling them in.

Frequently asked questions

I already own the land. Why would I charge myself for it? Because the alternative to using the land in the project is selling it, and that alternative has a value. Leaving the line blank does not make the land free; it moves its value into the profit line of the project, where it looks like something the project earned. Whether you enter it as a cost or hold it out of both columns is a presentation choice — what matters is that you make the same choice on both sides.

Can I use the figure on my council valuation notice? Treat it as what it is: a figure prepared for its own statutory purpose, on its own basis, at its own date and on its own assumptions. That is why, on its own, it does not answer the question this article is asking. Whether it bears any relationship to market value under highest and best use for a divisible allotment on your parcel is for a licensed valuer to say. If the land line matters to a decision this size, the input to use is a valuation from a licensed valuer, with its basis and its date stated on it.

How do I know what my block's highest and best use is? It is bounded by your parcel's development potential, which a planning consultant assesses against the Planning and Design Code — you can look the provisions up on PlanSA and put them to that consultant — and it is priced by reference to comparable transactions, which is a licensed valuer's work. The two questions are answered by different people, and the valuer's opinion depends on the planning answer.

Does this mean subdividing is usually not worth it? No, and no proportion is claimed here in either direction. The point is narrower: a table with land booked at zero cannot tell you either way, because it reports pre-existing land value as project profit. Fill the line in at market value and the table starts answering the question you actually asked.

A builder gave me a feasibility. Is that enough? It answers the construction side, which is that party's expertise. Ask where the land line came from, whose opinion it represents, and whether the bottom line is before or after tax. Those three answers are what turn a construction estimate into a feasibility you can compare against simply selling.

Who does what, and where Cyberate PM sits

Every input in this article belongs to a named professional:

• Market value and highest and best use — a licensed valuer.
• Construction and professional cost estimates — a quantity surveyor or your builder.
• Tax treatment of both paths, on the same after-tax basis — your registered tax agent or accountant.
• Contracts, title and division documentation — your solicitor.
• The plan of division and site survey — a licensed surveyor.
• Civil and stormwater design — a civil engineer.
• Your parcel's development potential, assessed against the Code — a planning consultant, against PlanSA.

Cyberate PM is engaged by the owner and does none of those things. We do not value land, estimate construction cost, survey, design, plan tax or give legal opinions. We coordinate: brief the right specialist for each line, sequence them so each has what it needs from the one before, hold one consistent set of assumptions so the two columns stay on the same basis, and put the unanswered questions in front of you rather than letting them sit blank.

Three things you can do before engaging anyone at scale, none of which involve a number:

1. Test the use ceiling. Have a planning consultant assess your parcel's development potential against the Code, so the sale-side value is being set against the right use.
2. Get an opinion of market value on a highest and best use basis from a licensed valuer, with the basis and the date stated on it.
3. Ask, of any feasibility you are shown, what is in the land line and whose opinion it represents.

If you are weighing whether to develop or sell and want the specialists briefed and their inputs held to one consistent set of assumptions, talk to us.

The statutory fees and tax treatments referred to here are updated by financial year, and this article reflects publicly available material at the time of writing. It is general information only and is not valuation, tax or legal advice.

Sources

• PlanSA — Zoning for a property
• Planning and Design Code — browse the Code
• PlanSA — Planning, Development and Infrastructure (Fees) Notice
• ATO — Subdividing and combining land
• ATO — Tax consequences on sales of property
• ATO — GST and the margin scheme