Building without a permit: check both building aspects before starting

1. Describe the plan precisely

Make a drawing showing location, dimensions, height and intended use. Record the existing main building, any earlier extensions and special site features. The legal category does not automatically follow a supplier’s product name. A garden office, open shed or container may raise questions about structures, use and functional connections. Complete a check using the actual plan and keep the data entered. A small change in location or use can affect the assessment. An opinion about a similar project further along the street is no certain conclusion for your plot.

Alongside the desired position, record existing buildings and use. This prevents a check for a detached outbuilding silently being used for an extension to another building. If the supplier has already prepared a conclusion, ask which inputs, location and version were used. A model name or standard brochure does not make the factual assumptions verifiable.

2. Check the technical construction activity

IPLO describes national permit rules and exceptions for technical building under the Besluit bouwwerken leefomgeving, Bbl. Investigate whether the plan falls under a permit requirement, exception or notification regime. Do not draw a final conclusion from one dimensional criterion where several conditions apply together. For structural or fire-safety questions, involve appropriate expertise. A building expert can establish the factual classification and technical data; legal applicability may be a separate question. Document the plan version assessed so a later revised design does not silently retain the same conclusion.

For structural changes, ask which parts change and which technical data establish this. A general phrase such as non-load-bearing does not replace the necessary factual assessment. Then separately record whether the conclusion is that no technical permit is needed, a notification is required or a permit application must be made. A conditional technical opinion thereby remains recognisable as conditional.

3. Check the spatial omgevingsplan activity

The spatial aspect has its own national and municipal rules. IPLO explains that municipalities may amend certain omgevingsplan rules and that national exceptions have a separate position. Review current location-specific rules and exact exception conditions. A conclusion of technical permit exemption is not enough here. Requirements concerning rear land, use or location must be compared with actual circumstances. Keep the map and rules consulted with the date. An old diagram from the Wabo era is not, without checking, a complete basis for a project carried out now.

A municipality may amend the bruidsschat transitional package of rules, while certain national permit-free exceptions have another basis. Record not just that the municipality said something, but which provision was used. Save the relevant location and rule version. For a later design, it can then be checked whether the previous conclusion still concerns the same place and activity.

4. Investigate special situations and notifications

Restrictions may apply to monuments, protected areas or archaeological heritage. A notification or information duty may also matter where one component needs no permit. For associated structures, IPLO explains that several conditions and the lawfulness of existing building or use play a part. Do not search only for the most favourable exception. List all requirements potentially applicable. If your case does not clearly fit, ask the municipality a targeted question using the same drawing and facts. An informal general answer is less useful than an assessment of the specific design.

Associated structures have several concurrent conditions; a favourable height alone does not decide the rest. Also check the lawfulness of the existing building or use on which you rely. Explicitly identify uncertainties to your adviser. It is better to investigate a missing fact than choose a favourable online-check answer simply to obtain a result.

5. Continue complying with building rules and neighbour law

Rijksoverheid stresses that safety, health and surroundings rules remain applicable without a permit too. IPLO says structures must always comply with the Bbl. Permit-free building also does not automatically resolve ownership, use of a shared wall or civil nuisance. Discuss plans with affected neighbours in time and record specific agreements where needed. Their consent does not automatically legalise a publicly unlawful plan. Conversely, a public-law exemption is no blanket permission to use someone else’s land. Each question needs its own check.

For a shared wall, identify the affected part and the permission or agreement you believe you have. Keep a drawing with that agreement. Later this helps distinguish disputes about building rules, ownership and performance of a neighbour commitment. A supplier investigating only the permit requirement has not automatically answered those private-law questions as well.

6. Record the conclusion and responsibilities

Keep the permit-check result, answers entered, drawings and any written explanation. Ask the adviser which components were and were not investigated. A commercial promise of permit-free supply may be limited or based on assumptions. Read who is responsible if dimensions or use differ. Forward a supervision question or enforcement letter immediately and check its deadline. For a genuinely permit-free plan, there is no permit decision to challenge through an ordinary objection, but compliance assessment and civil rights remain possible. Have the appropriate route determined.

If you receive a supervision letter, provide the original check together with the actually executed situation. The difference may matter: the earlier assessment may have been careful for the old plan while the new plan departs from it. Ask what factual correction is needed and whether a formal deadline is running. Do not assume that simply performing another online check fixes every legal problem.

7. Fictional example: a different place from the one checked

Suppose someone has an outbuilding at the rear checked, then moves the design closer to public land. The supplier still calls it the same model. Nevertheless, the changed location must be compared with the applicable rules again. This fictional example predicts no permit requirement. It shows why the conclusion depends on factual inputs and why a saved result persuades only if the checked plan remains identifiable. The same applies when a storage space later acquires another function.

A version comparison showing old and new locations, dimensions and use helps in the example. The adviser can identify which earlier conditions need rechecking. That is more targeted than asking whether the standard model remains permit-free. Also record who confirms the changed location to the builder, so construction does not rely on the old conclusion while following the new drawing.

8. Checklist where permit-free status is uncertain

Ask a lawyer or adviser for a conclusion per activity and a list of open issues. Discuss technical data needed, possible questions for the municipality and the engagement. Report any start date or threatened stop immediately so preparation occurs at the right moment.

After checking, place a short conclusion for each activity in the file, including conditions or missing data. Agree that a change of location, dimensions or use is reported again before execution. Where legal doubt exists, ask which component needs a location-specific assessment. This keeps the conclusion usable without treating it as a general guarantee for every later design.

• Exact drawing, dimensions, location and use.
• Technical permit requirement, exception or notification.
• Spatial rules and current omgevingsplan information.
• Special location, heritage and lawfulness of the existing situation.
• Bbl, neighbours’ rights and written responsibilities.