Fast
In minutes, not weeks
The analysis runs in your browser. No quotation process, no waiting time, no appointment with a consultant. You have the report before dinner.
Objection to a building plan · 6-week deadline
Will your sunlight be blocked?
The public notice (bekendmaking) has been issued. You have six weeks to submit a formal response (zienswijze) or a notice of objection (bezwaarschrift). Back it up with a sunlight report that the municipality (gemeente) has to take seriously.
Do not have a building drawing yet? This is how you sketch the plan yourself in the viewer.
Why Schaduwplan
Data your municipality cannot ignore.
We use the same official sources as traditional agencies, but deliver in minutes and for a fraction of the price.
Well-founded
TNO test + Council of State (Raad van State) precedents
The report tests against both the TNO Light and Strict norms and against every municipal variant. The method is based on administrative-law case law.
Affordable
€29.95 versus €330–€535
A fraction of a traditional consultancy agency. Possibly reimbursed by your home legal-expenses insurance — check your policy for "deskundigenrapport" (expert report).
How it works
From public notice to notice of objection in four steps.
No 3D experience needed. Just your address, an idea of the building plan, and five minutes.
- 01
Enter your own address
We automatically load the 3D model of your home and all surrounding buildings from 3DBAG + BAG + AHN. No upload needed.
- 02
Draw the planned building
Drag a rectangular volume or roof addition onto the right spot. Type in the estimated height and width. Not exactly right? You can adjust it later.
- 03
Place measurement points where sunlight matters to you
Your terrace, the vegetable garden, the kitchen window. Schaduwplan calculates how many hours of sun each spot gets — the current situation and with the building plan added.
- 04
Download the report
An A4 PDF with a north arrow, scale bar, before/after diagrams on every TNO reference day in your analysis, a measurement-point table and a TNO conclusion. Usable with your municipality and, as an indication, in court.
Legal substantiation
Why this report is taken seriously.
Three well-known rulings that set what a sunlight study must do — and therefore what Schaduwplan delivers as standard.
Council of State (Raad van State) · 2013
Ootmarsum
Building plan annulled because the sunlight substantiation was missing. Substantiation is a duty of care (Article 3:2 of the General Administrative Law Act (Awb)) — not optional.
Council of State (Raad van State) · 2023
Almelo
The TNO Light and Strict norms recognised as a reasonable assessment framework. The municipality chooses — and must give reasons for which norm applies.
Council of State (Raad van State) · 2023
Voorburg
Small height deviations (3 cm) accepted. But missing neighbouring buildings in the model were in fact decisive. Completeness counts.
Indicative supporting evidence. There is no national law for sunlight — the TNO standard is a guideline that municipalities and courts apply. For an appeal or a complicated neighbour-law dispute we strongly recommend involving a lawyer.
A second line of substantiation
Besides sun, the court also weighs daylight.
Are you mainly losing skylight rather than direct hours of sun? That is a second leg under your objection — and increasingly one that courts take into account.
Sunlight (direct hours of sun) is the familiar route. But Article 5:37 of the Dutch Civil Code protects against the "withholding of light", not only sun. An extension right in front of a north-facing or side wall barely touches the hours of sun, but it does take away a large part of the sky. The Northern Netherlands District Court (2 June 2025) and The Hague District Court (26 July 2024) based their construction stops partly on the reduction in daylight access.
Important to keep separate: the more complete figure the court weighs in such a case — the indoor daylight factor — is something it has an expert calculate, measured inside the room. Schaduwplan shows something different and simpler: per window, a sky-view indication (Vertical Sky Component) of how much sky the window still sees from the outside, before and after construction. That outdoor indication is an additional, conservative first signal; it does not replace the expert calculation, but it does point out where you have a case.
More on this: less daylight because of the neighbours — what the court takes into account.
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, no subscription
One complete report for your address. Usable straight away as an attachment to your formal response (zienswijze) or notice of objection (bezwaarschrift).
- TNO Light + Strict norms
- Municipal norms where they apply
- Before/after diagrams on all TNO reference days
- North arrow, scale and source references
- PDF usable straight away as an attachment
Questions about objecting