Iterate
Play with height and form
Lower the addition by 20 cm, shift the extension a metre, rotate the gable roof — and see immediately what it does to the shadow. No need to commission a consultancy.
Before you submit your permit
Prevent objections. Strengthen your permit.
An extension, roof addition or annex affects more than your own garden — it affects your neighbours too. Test it first, adjust the design, and submit a well-supported permit (omgevingsvergunning) application. Fewer surprises, less delay.
You do not need a construction drawing to start. Sketch the design directly in the viewer.
Why Schaduwplan
A better permit application, in less time.
We help you design with less shadow — and prove that your design is reasonable.
Neighbour peace
Show the impact proactively
An open conversation based on data prevents escalation. Send the PDF to your neighbours together with your permit application — often that is enough to prevent an objection.
Permit
A stronger application to the municipality
Many municipalities ask for a sunlight justification for permits that touch threshold values. Include it by default, and you get fewer follow-up questions.
How it works
From first sketch to submitted permit.
You do not need to know any 3D software. Sketching works with drag-and-drop blocks, and the calculations happen automatically.
- 01
Start with your own address
We load your home and all surrounding buildings from 3DBAG. Your home is marked as the subject automatically.
- 02
Sketch your renovation
Choose an extension, roof addition, annex or free-standing volume. Type in dimensions (L × W × H), then rotate or move it until it fits.
- 03
Evaluate the impact
Place measurement points on your terrace and on your neighbours' terrace. Schaduwplan calculates how many hours of sun each point gets per day — current situation versus design.
- 04
Adjust. Repeat. Download.
Is the impact too large? Adjust the height and recalculate. Happy with it? Download the report as an attachment to your permit application.
What is in your report
Everything the municipality usually asks for separately.
North arrow, scale bar, before-and-after diagrams on every TNO reference day in your analysis, a measurement-point table with pass/fail, a methodological basis, and source attribution. Ready for the permit desk (omgevingsloket).
- Before/after on every TNO reference day
- Height measurement via AHN (centimetre-accurate)
- TNO Light + Strict norm
- Municipal norms where applicable
- Before/after comparison per measurement point
- Source attribution on every page
Possibly covered by your home legal-expenses insurance.
Home legal-expenses insurance can cover sunlight reports in disputes about building permits or neighbour law. Check your policy for "deskundigenrapport" (expert report) or "bouwtechnisch advies" (technical building advice) — or email us and we will help.
How do I submit this to my insurer?→Report
€29.95 one-off per renovation
One report for your permit application.
- TNO Light + Strict norm
- Municipal norms where applicable
- Before/after comparison per measurement point
- North arrow, scale and source attribution
- PDF ready to use as an attachment
Questions about renovating