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Australia · United Kingdom

Shadow Diagrams & Shadow Analysis for Planning

Planning-focused shadow diagrams showing existing and proposed shadows at defined dates and times. Where a project requires a broader review of shadow impact, additional overshadowing or solar access analysis can be scoped separately.

Send Your Plans for a Shadow Review View Shadow Diagram Examples
18+ Years Experience 950+ architectural modelling and visualisation projects across all services since 2008 1 Included Revision

Shadow Diagrams vs Shadow Analysis: What Do You Need?

Shadow diagrams — sometimes called shadow drawings or shadow plans — are visual drawings showing where existing and proposed shadows fall at defined dates and times. Shadow analysis goes further — reviewing those impacts against affected windows, private open space, neighbouring property or the relevant planning criteria.

Some projects require diagrams only. Others need quantified overshadowing or solar access analysis. Send us the planning authority and project drawings and we will confirm the required scope before quoting.

AU · Australia — Planning & DA Shadow Studies
Project-specific shadow diagrams for Australian development and planning applications. The relevant state, local authority and project requirements are reviewed before the analysis scope is confirmed.
UK · United Kingdom — Planning Shadow Studies
Shadow studies and overshadowing visualisation for UK planning projects. Formal daylight and sunlight assessment scope, including VSC, APSH or NSL where required, is confirmed separately before instruction.
Choose Your Market

Shadow Services by Market

Planning terminology, required shadow outputs and assessment scope vary between markets and projects. Choose the relevant market to review the service and project information we need.

AU
Australia
Shadow diagrams and project-specific shadow studies for Australian DA and planning projects across NSW, VIC, QLD and WA.
Sydney Melbourne Brisbane Perth
See Australia pricing & detail →
UK
United Kingdom
Planning-focused shadow studies and overshadowing visualisation for UK projects. Formal daylight and sunlight assessment scope is confirmed separately where required.
London Manchester Birmingham Leeds
See UK pricing & detail →
Shadow Study Quality

What Makes a Shadow Study Clear and Reviewable

A useful shadow study starts with the correct project information, a confirmed analysis scope and a consistent presentation of existing and proposed conditions.

Common Project Risks
  • ✕
    Incomplete Project Information

    Missing survey information, unclear north orientation or outdated drawings can affect the accuracy of a shadow study.

  • ✕
    Incorrect Analysis Scope

    Dates, time intervals and required drawing types can vary between projects and planning authorities.

  • ✕
    Unclear Existing vs Proposed Comparison

    Shadow impacts are difficult to review when existing and proposed conditions are not presented consistently.

The CasStudio Process
  • ✓
    Project Information Reviewed

    Available drawings, survey information and project location are reviewed before modelling begins.

  • ✓
    Scope Confirmed Before Quoting

    Required dates, times and deliverables are agreed before the project starts.

  • ✓
    Consistent Shadow Presentation

    Existing and proposed shadows are presented using a consistent visual system and clearly identified project information.

Case Study

Production Pilot — 4-Storey Residential Shadow Study

Randwick Planning Documentation Scope

This production pilot was prepared to test a multi-date shadow study workflow against a Randwick-style planning documentation scope. The model includes existing and proposed conditions, three assessment dates and plan/elevation shadow outputs.

9
Diagrams Delivered
48h
First Draft
What You Receive

Every project includes

Shadow Diagrams
Shadow diagrams (shadow drawings) at the dates and time intervals confirmed for the project scope. Standard presentation sets may use selected time points, while some planning requirements call for hourly or additional intervals.
Methodology & Scope Summary
A project summary identifying the analysis location, reference date, time intervals, north reference and shadow presentation method used for the agreed deliverables.
Calibrated North Point
True north confirmed from your survey data before any shadows are cast.
Legend, Scale Bar & Title Block
Clearly identified legend, scale information, north reference and date/time information, prepared to the confirmed drawing scope.
PDF + DWG/ArchiCAD Source
Print-ready PDF plus DWG/DXF or ArchiCAD source file, updated within scope if your design changes.
48h First Draft · 3–5 Day Final
First working draft within 48 hours. Final deliverable in 3–5 business days after review.
How It Works

From Project Files to Final Shadow Deliverables in 4 Steps

01
Send Your Project Information
Share your available DWG, IFC, PDF or ArchiCAD files, site survey, project address and any planning authority request or assessment brief.
02
We Confirm the Shadow Scope
We review the project information and confirm the required analysis dates, time intervals, drawing types and deliverables before quoting.
03
Shadow Model & First Draft
The existing and proposed project geometry is prepared for the confirmed assessment scope and the first shadow outputs are issued for review.
04
Review & Final Delivery
You review the draft and provide any project corrections or design updates covered by the agreed revision scope. Final files are then prepared in the confirmed PDF and source-file formats.
Pricing

Fixed-price. Direct from studio. No agency markup.

Pricing differs by market

CasStudio operates from its own studio in Skopje — no local office rent, no agency layers. UK and Australian pricing reflect each market's requirements and are not simple currency conversions of each other. See exact, current pricing on your market page.

UK — See UK Pricing AU — See Australia Pricing

All fees are fixed per project — not hourly. Prices exclude VAT/GST. Direct studio delivery keeps project overhead low while the scope, deliverables and revision process remain clearly defined before work begins.

Sample Work

What a Clear Shadow Diagram Set Can Show

Selected shadow study examples and production pilots. Each example is labelled according to its actual project status.

Winter Solstice — 9:00 AM
Residential Development · Sydney · Existing vs Proposed Shadow Study — Pilot
Equinox — 12:00 PM
UK Planning Project · Shadow & Overshadowing Visualisation — Pilot Study
Winter Solstice — 3:00 PM
Residential Development · Victoria · Midwinter Shadow Study
View full portfolio of shadow diagrams and visualisation work →
FAQ

Questions we hear every week

DWG, IFC, PDF or ArchiCAD files — site plan, survey, and proposed building. A site survey or OS/cadastral extract confirms true north and boundaries for accurate shadow drawings.
No — 48 hours is your first working draft. After your review and one revision round, the final print-ready PDF and DWG/ArchiCAD source files are delivered in 3–5 business days.
We work on Australian projects across NSW, VIC, QLD and WA. The relevant planning authority, development type and available project requirements are reviewed before we confirm the shadow scope.
Yes. We prepare planning-focused shadow studies and overshadowing visualisation for UK projects. Where a project requires a formal daylight and sunlight assessment involving VSC, APSH or NSL, that scope is reviewed and quoted separately.
One revision round is included within the agreed project scope. If the planning authority requests clarification specifically relating to the supplied shadow diagrams, send us the request and we will review the required update.
CasStudio operates from its own studio in Skopje — no local office rent, no agency layers, no project managers between you and the work. Lower overhead, not lower quality.
Request a Quote

Tell us about your project. We respond within 24 hours.

  • Fixed-price quote — no hourly surprises
  • We confirm the project and shadow scope upfront — before you commit
  • No obligation. No sales calls.

Email: info@casstudio.com
Working hours: Mon–Fri, 08:00–18:00