Edition 04 · Apr 2026 Filed under — For Building Designers Feasibly · The Brief

For Building Designers

Start every sketch with the envelope already in hand.

Schedule-specific height, setbacks, garden area, coverage, plus ResCode Clause 55 for Victorian sites — resolved against the council's schedule, not just the VPP defaults.

FIG. 01 — THE ENVELOPE, EXTRUDED

Status quo

Why schematic stage stalls

  1. 01

    Client emails an address

    Wants a sketch by Friday.

  2. 02

    You need the envelope

    Height, setbacks, garden area, coverage, overlays, before you put pen to SketchUp.

  3. 03

    You read the planning scheme

    Zone schedule, Clause 55, council variations, overlay schedules. 45 minutes.

  4. 04

    You sketch

    But 20% of the time, a schedule constraint invalidates the concept later.

The lookup

What the envelope response gives you

15 Sorrett Ave, Malvern VIC 3144 HCTZ1 · Stonnington · 969 m² · 12 m frontage
Max height
13.5 m
Cl.32.10 · mandatory
Verified
Front setback
6 m
Cl.32.10 / ResCode
VPP default
Side setback
1 m
Cl.32.10 / ResCode
VPP default
Rear setback
3 m
Cl.32.10 / ResCode
VPP default
Site coverage
60%
Cl.32.10
VPP default
Garden area
n/a
does not apply to HCTZ1
VPP default
Overlay
HO396
Cl.43.01 · Heritage
Permit

Every row carries its clause and its confidence tier. “VPP default” means the zone provision applies because this council’s schedule sets no different figure — which is itself the answer you needed, and is labelled rather than dressed up as a verified value.

Max height — schedule-resolved

Not the zone default. The council's actual schedule value, with confidence tag.

ResCode Clause 55 (VIC)

Building envelope generator: height, side/rear setbacks, neighbourhood character, overlooking, private open space. All 7 standards under VC267.

Garden area %

The schedule's actual requirement, not the 35% VPP default.

Overlays that affect built form

Heritage, neighbourhood character, design & development, significant landscape, with their design implications noted.

Lot shape + frontage orientation

Which edge faces the street. Aspect. Facing direction. Compactness. Battle-axe flag.

Source-linked

Every figure clicks through to the planning scheme page it came from.

Before / after

The first-sketch cycle

Without it

~45 min + occasional redo

  1. Open state planning portal
  2. Find zone schedule, read it
  3. Cross-check overlay schedules
  4. Apply ResCode Clause 55 mentally
  5. Sketch, and hope the schedule isn't stricter than expected

With Feasibly

~3 min

  1. Lookup address
  2. Copy envelope figures into your CAD notes
  3. Sketch with the real numbers

Footnotes

What building designers ask

Does it cover NSW ADG for apartments?
Partially — apartment-specific ADG compliance isn't in the envelope response yet. LEP height and FSR are.
Does it read DDO schedules?
Zone schedule is the primary envelope source. DDO-imposed variations are flagged but not yet parsed for every council. We cite the DDO code so you can review directly.
Is it reliable enough for permit application?
No — use it for concept stage. Verify against the planning scheme before submission.

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