Can sixty-nine hectares become three lots without breaking the zone?

Under State Planning Provision 22.5.1, a subdivision in the Landscape Conservation Zone can be tested two ways. The tidy one is closed to this parcel by arithmetic. The other is open — but it is merits-assessed, not guaranteed.

The performance case does not stop at lot size. P1 also weighs access (a ≥40 m frontage or a ≥3.6 m right-of-carriageway), reasonable vehicular access to the road authority's satisfaction, and — with no Acceptable Solution offered — that every lot can carry its own on-site wastewater system. Each of those is its own performance sub-test. Fact Todo — on-ground

This is the parcel's real boundary from LISTmap — an east–west equal-area split into three 23.08 ha lots (green shading is priority vegetation; note Lot C sits almost entirely inside it). Schematic only — the lot lines are illustrative, not a plan of survey; areas are computed geometry, not a surveyed title measurement. Assumption — layout

The same title, the same north–south equal-area cut, drawn once at two lots and once at three. It is the trade-off in one picture: two larger lots are the easy geometry — both carry a constraint-clear building envelope — while the third lot is where the difficulty concentrates.

Same real LISTmap boundary as §02, both panels cut on the same axis so they compare like-for-like; green is priority vegetation. Adding the third lot does not fail the arithmetic — 23.08 ha still clears the 20 ha P1 floor — but it forces the marginal (eastern) lot entirely into priority vegetation, which is where the buildability and access risk lands. The surveyor-grade design answers this with deliberately unequal, terrain-following lots (§02b), not equal bands. More lots means more capital events and more consent risk on the marginal lot; no lot values or approval odds are implied here. Fact — computed geometry, EPSG:28355 Assumption — illustrative lot lines, not a plan of survey Todo — surveyor / planner sign-off

The equal-area split above treats the parcel as a rectangle. The land is not one. A second design draws boundaries that follow the terrain, the existing access track, and the on-title easement corridor — driven by access and buildability, not arithmetic. Lots are deliberately unequal.

Why this design exists: this is the real design carried forward — the one a surveyor and planner would actually work from. The equal-area split in §02 above is only the naive geometric baseline; it treats the parcel as a rectangle to establish that the arithmetic clears the floor, then this design does the harder work the land actually demands.

The south boundary (dashed) follows the terrain at the ~390–400 m contour level, rising NE with the ground. The north–south boundary follows the internal access track's entry point into the upper parcel, at a bearing that balances the two upper lots above the 20 ha floor. Fact — computed Choice — bearing tuned

Two of three lots get an A1(e) building envelope in non-PVA cleared land — the maximum possible given only two fragments exist. Lot 3 (100% PVA, no frontage) is the hardest case: access requires a right-of-carriageway or new track, and its envelope defaults to the C7.7.2 performance path. Its 0.09 ha headroom above the 20 ha floor is thin. Fact — computed Risk — Lot 3 access Todo — surveyor

Design computed from the live LIST cadastral boundary in EPSG:28355. Geometry invariants tested: 3 lots, no gaps/overlaps, areas sum to 69.25 ha. The drawing above is a simplified visual; the exact computed boundaries and full design rationale are held in the lab's research files. Assumption — concept only

P1(e) asks whether new lots sit consistently within the established pattern of the area. The cadastre answers plainly: this locality is made of lots far smaller than the one on offer.

Within a true 1500 m buffer of the parcel there are 41 LCZ parcels: median 16.47 ha, 25 of them under 20 ha, only 3 at or above 50 ha. Widened to the whole Cygnet locality, 117 LCZ-primary parcels have a median of just 7.23 ha. Five LCZ parcels share a boundary with the title: three freehold titles at 17.8, 25.5 and 41.0 ha, plus two small non-freehold cadastral records at 1.6 and 2.8 ha (tenure type not yet classified against the LIST code dictionary); five more LCZ lots of 4.5–34.8 ha sit directly across the ~20 m road reserve. The pattern a kill test feared — a neighbourhood of ≥50 ha holdings that would make ~23 ha lots look out of place — is the opposite of what the data shows. Fact — cadastre

On Tobys Hill Road itself, titles 181389/1 and /2 form a ~20.5 ha pair on a single plan — an apparent prior split into P1-sized lots on this very road. Whether it predates or postdates the zone is still to be pulled; either way it is pattern evidence. Assumption Todo — plan history

The counter-argument to plan for: the Tasmanian Planning Commission's Huon Valley LPS reasons (12 July 2024) state the LCZ "is not a large-lot residential zone" and residential use is "largely discretionary." That is the strongest line council could run against a split whose end-state is three dwellings. The pre-application framing must therefore lead with landscape and conservation outcomes — not residential yield. Fact — TPC reasons Risk — framing

The lot lines are the easy part. The constraint stack is what any layout has to thread — and it covers almost all of the parcel.

The pivotal number is the 8.7% (6.02 ha) of non-PVA land — two interior "holes" in the priority-vegetation mapping, 4.16 ha and 1.86 ha. A native-CRS query corrected an earlier "100% PVA" figure and confirmed these gaps are real. They matter because the A1(e) exemption permits clearing not located within a PVA — so a building envelope sited in a hole may avoid the hardest vegetation test. A BAL-19 envelope with access and water typically needs under 1 ha, so in principle the fragments are large enough. Fact — 91.3% PVA

A same-day constraint check answered part of the siting question: net of the landslip bands, the waterway protection area and the C/D/E easement corridor, the fragments retain 3.15 ha and 1.47 ha of unconstrained land, each fitting a 25 m × 25 m building area clear of every mapped constraint; mean gradients (~1:8.1 and ~1:5.9 from 10 m contours) sit inside the 1:5 buildable-area ceiling, and TASVEG maps both fragments as existing cleared/modified land. But the two fragments sit only ~580 m apart in one band of the parcel — so the A1(e) play is geometrically available for at most two of three lots; the third envelope defaults to the C7 performance test. Ground-truthing, BAL-19 footprints and lot-layout feasibility remain open. Fact — GIS, mapped resolution Assumption — layout Todo — terrain & BAL

Neither the Bushfire-Prone Areas Code nor the Natural Assets Code contains a hard stop for this subdivision — both are performance-assessable. The difficulty is that satisfying one works against the other.

The resolution — if there is one — is a joint HMA-minimising lot design: site every building envelope in the existing cleared and non-PVA land so the bushfire footprint and the vegetation-clearing footprint are the same footprint. That is a consultant's drafting problem, and its acceptance is a merits call. Risk — the hardest constraint Assumption — a satisfying layout exists

A subdivision layout inherits every burden the title already carries. The folio search (Result of Search, Ed 8, searched 17-Jul-2026) and an exact GIS intersection agree: a shared carriageway corridor runs through the land, benefiting seven neighbours.

An exact polygon intersection confirms one mapped easement — a 1.27 ha right-of-carriageway corridor — sits 100% inside the title. That corridor carries the seven burdening rights of way above; the parcel's own legal access is the benefiting easement C766278 over ways A and B. Two consequences for any layout: those carriageway rights survive subdivision and constrain lot boundaries and access, and the registered mortgage means mortgagee consent is needed for any plan of subdivision. Fact — folio + GIS

Thread closed: a drafted 2018 easement transfer (dealing M735248, ways C/D) could not be excluded by the last search then in hand — a 20-Nov-2019 search of Edition 6, itself issued 17-Apr-2009 — so an eighth burden could not be ruled out. A current search settles it: Edition 8 (issued 28-Nov-2023, searched 17-Jul-2026) records exactly seven burdens, unchanged since 1998, and no unregistered dealings or notations. M735248 was never registered. This no longer gates the surveyor brief. Fact — Result of Search, Ed 8

A kill test is a check that would end the case outright if it cut the wrong way. The dossier runs six of them. Three came back survive; three remain open and each needs a person, not a query.

Nothing below carries a verified figure. Every cost is a Stage-0 placeholder until a quote or professional view lands — no number here should be read as fact.

Todo every capital line — Risk the ecological and credibility trade-offs — Choice which tracks survive on a retained ~23 ha lot.

OPEN — the most promising capital event in the portfolio, materially de-risked but not decided. The arithmetic closes the easy door and the performance pathway opens the hard one. Three kill tests survived their desk passes; the neighbourhood pattern helps rather than hurts; no code contains a hard stop. What remains is human judgment — a council pre-application signal, a consultant's feasibility view, and a current-edition title search — plus the owner's own call on surrendering two-thirds of the land.

The single largest synergy sits just past this door: if building areas are shown on the sealed plan at subdivision, a future dwelling on each lot becomes Permitted rather than Discretionary — the biggest keystone unlock in the whole portfolio. That, too, is an assumption until council confirms building areas can be created at the subdivision stage. Assumption Choice — owner

Recommended next action — in order, each a gate on the next:

1. Pull a current-edition title search — done 17-Jul-2026. Edition 8 confirms the seven-burden schedule and shows M735248 was never registered. This gate is cleared. Done
2. Book a council pre-application meeting to test whether a P1 split is supportable given the overlay stack — no professional is engaged until this returns a signal. Todo
3. Only if the pre-application survives, commission a planner and surveyor for a feasibility view and a layout that resolves the code tension. Todo Choice — owner

How to read the tags — Fact verified from source · Assumption plausible, unverified · Risk could harm credibility, ecology, or position · Todo needs a licence, survey, or professional view · Choice a strategic call for the owner.

Read next → the one-page case (the planner-facing summary) · the design appendix (equal-area sketches + the access caveat).