Do you provide shadow diagrams for QLD and WA?

Yes. For Queensland we work to the applicable State Planning Policy and local planning scheme. For Western Australia we work to R-Codes and the applicable Local Planning Scheme. In all cases we confirm the applicable control and reference date before work starts.

How long does it take?

Your first working draft is delivered within 48 hours of confirmed project start. One revision round is included. Final deliverables typically take 3-5 business days. For urgent DA lodgements, same-day or 24-hour delivery is available on request.

Can you match the drawing style of our architectural set?

Yes. We can match line weights, hatching styles, colour schemes and title block formats to your existing drawing set. Share your office standard or a previous shadow diagram with your brief and we'll match it.

Australia · Shadow Diagram Service

Shadow Diagrams for
Australian DA Submissions.

Q: What files do I need to provide?

Site plans (DWG, PDF or ArchiCAD preferred), a registered survey for true north and boundary verification, and the council name or DA reference number. IFC/Revit files are also accepted.

Q: Is GST charged on invoices?

No. CasStudio is based in Skopje, North Macedonia. Invoices are issued in AUD from a non-Australian entity and are not subject to Australian GST. Payment terms are NET 14.

Project-specific shadow diagrams for Australian development and planning applications. We review the state, local authority, development type and available planning requirements before confirming the shadow scope.

Send Your Plans for a Shadow Scope Review View Sample Work

18+ Years Experience Council-Ready Documentation From AUD 400 — Fixed Price for the Confirmed Scope 1 Included Revision

We review the applicable planning requirements before we model a single shadow

NEW SOUTH WALES Housing SEPP / Apartment Design Guide requirements where applicable, together with the relevant local planning controls and project-specific assessment scope.

VICTORIA Current Victorian residential planning provisions and local planning scheme requirements reviewed against the development type and applicable planning pathway.

QUEENSLAND Property-specific planning scheme information, including relevant zones, overlays, neighbourhood plans and development codes, reviewed where applicable.

WESTERN AUSTRALIA Current R-Codes Volume 1 or Volume 2 and relevant local planning requirements reviewed where applicable to the project.

Common Rejection Reasons

✕
Wrong reference date or time-step interval
Reference dates and time-step intervals vary by state and local authority — for example, 21 June (winter solstice) or 22 September (equinox), depending on the applicable planning framework. Using an incorrect date can require the study to be revised before it can be assessed.
✕
No methodology statement or software declaration
A written methodology note — confirming the sun-path model, software used, site coordinates and applicable planning reference — helps council assessment officers verify the results. Without it, the results can be difficult to independently verify.
✕
Incorrect true north or unverifiable scale
Shadow diagrams built from an incorrect north point, or without a calibrated scale bar, cannot be independently verified. This can result in a request for correction or resubmission, which may extend the assessment timeline.

The CasStudio Standard

✓
Planning-researched reference dates, every project
We review the applicable planning requirements and any relevant state planning policy before work starts. Reference dates, time-step intervals, and required seasonal analyses are confirmed in writing before we model a single shadow.
✓
Full methodology statement included as standard
Every deliverable includes a written methodology note confirming software, sun-path engine, site coordinates (latitude/longitude), applicable planning reference, and reference standard. Ready to include in your DA submission as-is.
✓
Survey-accurate geometry and confirmed true north
We build from your survey, DWG, ArchiCAD or IFC files. True north is confirmed against site survey or registered plan data before the first shadow is cast. Scale bar, north point and title block are production-ready for council submission.

State / Territory	Reference Date	Required Times	Overshadowing Threshold	Key Planning Reference
NSW	21 June (Winter Solstice)	9am, 12pm, 3pm AEST	2 hrs to living areas + POS (ADG); local planning requirements may specify additional criteria	Housing SEPP / ADG / Local Planning Scheme
VIC	22 September (Equinox)	9am–3pm AEST, hourly or per planning requirement	Solar access to secluded private open space under current Victorian residential planning provisions	Current Victorian planning scheme provisions / Local schedule
QLD	Varies by council	Council-specific	Solar access to habitable rooms and private open space; varies by LGA	SPP / Local Planning Scheme
WA	21 June (Winter Solstice)	9am–3pm AWST, hourly	Solar access to adjoining properties; confirmed against current R-Codes and LPS before each project	R-Codes / Local Planning Scheme

Reference standards current as of 2025. Always confirmed against the current planning requirements before work commences.

Shadow Footprints at All Required Times

Existing shadows and proposed shadows distinguished by colour at every council-required time-point — 9am, 12pm and 3pm as standard, with additional times included where the planning requirements call for them.

Overshadowing Results Summary

The study results summarised against the identified planning criterion — Housing SEPP / ADG 2-hour minimum for NSW, current Victorian residential planning provisions for VIC, or the specific local planning control — stated clearly in the methodology note so your planner can reference it directly in the DA assessment.

Full Methodology Statement

Written methodology note confirming: software and sun-path model; site coordinates; applicable planning reference and standard; analysis dates and times; and the basis for true north calibration. Ready to lodge as-is.

True North & Survey-Accurate Geometry

True north confirmed against your registered survey plan or lot data. Site boundaries, neighbouring property footprints and street alignment verified against your survey before work starts. Scale bar and north point annotation consistent with your architectural drawings.

Print-Ready PDF + DWG / ArchiCAD Source

A4/A3 print-ready PDF formatted for DA lodgement, plus full DWG and/or ArchiCAD source files so your architect or certifier can verify the model independently. No locked files, no watermarks.

1 Included Revision

One revision round is included within the agreed project scope. We review the request, update the analysis as required, and re-issue the set within 48 hours.

Anonymised extracts from recently delivered Australian DA submissions. All projects include existing and proposed shadows at all required time-points.

Multi-Residential · NSW · 9am / 12pm / 3pm · 21 June

Multi-Storey Residential — NSW

Four time-point overshadowing analysis with neighbouring properties and site boundaries clearly marked. Housing SEPP / ADG solar access results summarised against the 2-hour criterion.

Dual Occupancy · VIC · Equinox · 5-hour solar access

Dual Occupancy — VIC

Overshadowing impact on secluded private open space at 22 September equinox. Applicable Victorian overshadowing threshold confirmed against the current planning provisions.

Mixed-Use · QLD · Local planning reference · Existing vs proposed

Mixed-Use Development — QLD

Existing vs proposed shadows distinguished by colour at council-specified reference times. Shadow impact on adjoining habitable rooms quantified.

Send Your Brief

Share your site plans, survey, and the council or DA reference number. We confirm the applicable planning reference, reference dates, and any specific requirements before we start. No guesswork, no assumptions.

Planning Research & Modelling

We review the applicable planning requirements and any relevant state policy (Housing SEPP / ADG for NSW, ResCode for VIC, SPP for QLD or R-Codes for WA), confirm the analysis parameters in writing, and build a survey-accurate 3D model with confirmed true north.

First Draft in 48 Hours

Your first working draft arrives within 48 hours of confirmed project start. You review, request any changes, and we revise — one full revision round is included at no extra charge.

Print-Ready Deliverables

Once approved, you receive a print-ready PDF formatted for council lodgement, plus DWG and/or ArchiCAD source files. Methodology statement included. Ready to attach to your DA documentation.

Single Lot DA

^AUD400

Standard residential DA — single site, up to 3 required time-points, one planning reference.

Shadow footprints at all council-required assessment times
Existing vs proposed shadows distinguished
True north calibration + scale bar
Methodology statement included
Print-ready PDF + DWG/ArchiCAD source
1 included revision
NET 14 payment terms

Extended Shadow Study

^AUD750

Townhouses, multi-dwelling, or state/council-specific extra requirements.

Everything in Single Lot DA, plus:
Hourly intervals where required
Elevation shadow diagrams on neighbouring walls
Additional reference dates where required
3D perspective shadow views

Most Common

Complex / Multi-Unit

^AUD2,000+

Multi-storey residential, mixed-use, precinct studies, topographically complex sites, or 5+ required time-points.

Everything in Single Lot DA
Multiple building envelopes / massing options
Extended time-point coverage
ADG solar access analysis with results summary
Topography and survey integration
Priority 48-hour turnaround available
Quoted per project scope

All prices in AUD, excluding GST. Invoiced from KAS STUDIO DOOEL, Skopje, North Macedonia. Fixed quotes issued within 24 hours of brief received.

Get a Fixed-Price Quote

NSW Sydney City of Sydney · Inner West · Randwick · Bayside · Northern Beaches

NSW Newcastle City of Newcastle · Lake Macquarie · Maitland

VIC Melbourne City of Melbourne · Stonnington · Boroondara · Port Phillip

VIC Geelong City of Greater Geelong and surrounding LGAs

QLD Brisbane Brisbane City Council · Moreton Bay · Gold Coast

QLD Gold Coast Gold Coast City Council and surrounding LGAs

WA Perth City of Perth · Fremantle · Stirling · Subiaco · Vincent

WA Fremantle City of Fremantle and inner-metropolitan LGAs

Sydney is currently the only city with a dedicated page. Additional city pages coming soon.

Most NSW councils require shadow analysis at the winter solstice (21 June) at 9am, 12pm and 3pm AEST. The Apartment Design Guide (ADG) — applied under the Housing SEPP — sets a minimum 2-hour solar access standard for living areas and private open space. Specific councils may require additional time-points or seasonal analyses; we confirm this against the applicable planning requirements before work starts.

Victoria's residential planning provisions were reformed in 2025. Depending on the scale of development, Clause 54, Clause 55 or Clause 57 of the planning scheme now applies, and overshadowing of neighbouring secluded private open space remains a core assessment requirement. The pre-reform standards commonly cited as A14 and B21 have been restructured under the current provisions. We confirm the applicable clause, standard and any local schedule requirements for each project before work starts. Individual councils may impose additional requirements.

Yes. For Queensland, we work to the applicable State Planning Policy (SPP) and local planning scheme controls, which vary by LGA — Brisbane City Council, Gold Coast, Moreton Bay, and others each have specific requirements we confirm before starting. For Western Australia, we work to the R-Codes Volume 2 and the applicable Local Planning Scheme. In all cases, we confirm the applicable control and reference date in writing before work starts.

For accurate shadow modelling, we need your site plans (DWG, PDF or ArchiCAD files preferred), a registered survey or lot plan for true north and boundary verification, and the council name or DA reference number so we can confirm the applicable planning requirements. IFC files from Revit or BIM models are also accepted. If you don't have a DWG, we can work from a scaled PDF — contact us to discuss.

Your first working draft is delivered within 48 hours of a confirmed project start (receipt of all required files and written project confirmation). One revision round is included. For urgent DA lodgements, same-day or 24-hour delivery is available — mention it when you send your brief and we'll confirm availability. Final deliverables typically take 3–5 business days from confirmed project start to final print-ready PDF.

No. CasStudio is based in Skopje, North Macedonia (KAS STUDIO DOOEL). Invoices are issued in AUD from a non-Australian entity and are therefore not subject to Australian GST. Payment terms are NET 14 from invoice date. We accept bank transfer (EFT) and major credit cards.

Yes. We can match line weights, hatching styles, colour schemes and title block formats to your existing drawing set. If you have an office standard or a previous shadow diagram you'd like us to replicate in style, share it with your brief and we'll match it.

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Shadow Diagrams Overview

Our full shadow diagram service — UK and Australia. Market-neutral overview with links to all per-market and per-city pages.

United Kingdom

Shadow Diagrams for UK Planning

BRE 209 / local planning authority briefs. Covers London, Manchester, Birmingham, Leeds, Oxford & Cambridge, Surrey & Kent.

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