Construction damage from work next door: evidence and legal advice

1. Assess safety and further damage first

Indications of immediate danger require appropriate technical or emergency assistance. Do not investigate an unstable structure yourself. From a safe position, record what is visible and when it appeared. Note new cracks, sticking components or other changes without presenting their cause as certain. Notifying the municipality may be relevant to safety or compliance, but does not replace a civil claim. Ask who is assessing the risks and which measures are appropriate. A legal dispute should not be resolved by undertaking dangerous work on someone else’s building yourself.

When reporting a safety concern, ask which situation the expert is assessing and whether a temporary measure is necessary. Keep the specific advice and its time. If immediate intervention is required, record what could still safely be photographed beforehand and what the intervention changes. Avoid unconditionally promising that a particular contractor will bear all costs before the cause and liability have been investigated.

2. Create a timeline of the condition and work

Collect photographs from before, during and after the work, earlier reports and any baseline condition survey. Record what work took place on which date and when you observed changes. Separate observations from suspicions. A crack becoming visible after an activity may be relevant, but timing alone does not establish every cause. Preserve original files and messages. Ask an expert what additional measurements or documentation are needed. A useful timeline also identifies what already existed, preventing all age-related damage from inadvertently being attributed to the same construction project.

Describe the baseline survey precisely: which rooms were visited, which photographs belong to it and which components were not visible? The absence of a baseline survey does not automatically make a claim impossible; other evidence may exist. Old sales photographs, maintenance reports and earlier messages can support the timeline. Record their limitations too, so that a small old image is not presented as a full inspection.

3. Identify the client and the parties carrying out the work

Ask who the client, main contractor and relevant subcontractor are. A logo on a construction fence may not reveal the full allocation of legal roles. Report the damage factually in writing, requesting a response and details of a responsible contact. A lawyer can determine who should face a claim and on what basis; multiple participants are not automatically all liable for everything. Supply correspondence with insurers as well. An insurer’s investigation does not itself acknowledge liability or full coverage. Keep a clear record of the original parties and their responses alongside insurance communications.

Create a list of parties with full names, addresses and the role each confirms. Do not address a message solely to a foreman if it is unclear which company he represents. Request acknowledgement of receipt and retain referrals. If no response follows, your lawyer can identify which party still needs a formal letter instead of searching for the same site contacts again.

4. Investigate causation and liability with care

In 2024 the Dutch Supreme Court explained that work carrying a significant risk of damage can, in certain circumstances, give rise to liability even where preparation and execution were careful. The specific risks, interests and consequences mattered. This is no general rule that all damage to neighbouring property is automatically compensated. Have the technical events, precautions and legal basis assessed. A statement that work complied with the permit does not automatically resolve the civil issue. Conversely, departing from a permit does not by itself establish the full extent and cause of the damage claimed.

In its judgment of 12 January 2024, the Supreme Court considered, among other things, that the significant risk materialised, the work served the interests of the contractor or its client, and the injured party derived no benefit. What society can reasonably expect people to tolerate and the availability of insurance also mattered. These factors create specific investigative questions, not a fixed rule making every construction company liable for every crack. Therefore collect available risk assessments and information about precautions too.

5. Distinguish investigation from repair

Ask an expert which question is being answered: current damage, cause, risk of deterioration or repair method. Define the costs and assignment in advance. Coordinate investigations where possible so the parties can assess the original condition. If emergency repairs cannot wait, responsibly document the need and situation. Preserve relevant components where practical. A repair estimate does not automatically prove causation. Ensure age, earlier defects and alternative causes are considered honestly. A transparent report is more useful than a categorical total without a method or acknowledgement of investigative limitations.

A useful expert assignment can ask which damage is new, which explanations are technically plausible and what further investigation could distinguish them. Ask whether a joint inspection would help and provide the opposing party’s objections. An expert examining another possible cause does not make your report less useful: this shows how the conclusion was reached and what uncertainty remains.

6. Choose civil and administrative routes deliberately

A request to the authorities may concern compliance or safety. A civil claim may concern liability, measures or compensation. IPLO describes enforcement instruments and the possibility for interested parties to request enforcement. That procedure does not automatically decide your entire damages claim. If further damage threatens, a lawyer can assess whether urgent relief is appropriate and what evidence is needed. Blocking the site or moving materials yourself is not an obvious solution. Monitor claim and procedural deadlines and notifications to your own insurer separately; one report to the municipality does not cover every route.

For an urgent request, specify what work remains and why waiting for ordinary proceedings could cause additional damage. Provide both the total repair estimate and the technical explanation of that risk. Wanting construction to stop and having a legally sufficient urgent claim are different things. Also establish who will continue monitoring the ordinary damages claim and insurance correspondence.

If cover for damage to your own building is also disputed, read about the separate buildings insurance claim. Liability and repair obligations remain separate questions.

7. Fictional example: new cracks during foundation work

Suppose foundation work is taking place beside a home and its owner notices new cracks. He takes photographs safely, collects the earlier condition survey and reports the change, with its date, to the client and contractor. An expert investigates its development and possible cause. The lawyer assesses the appropriate legal basis and whether further investigation or an urgent step is necessary. This fictional example predicts neither liability nor a stop to construction. It illustrates why causation, safety measures and compensation each raise their own questions, and why a permit alone does not answer the entire civil case.

The fictional file might contain a crack map to which new observations are added with dates. This lets an expert investigate development without the owner already determining the cause. An earlier survey with comparable photographs can help. If emergency repairs take place, also record which components can no longer subsequently be examined in their original condition.

8. Checklist for a construction damage lawyer

Ask which parties and facts should be investigated first. Agree who will approach experts and opposing parties and how deadlines will be monitored. Discuss costs and possible legal expenses assistance. Preserve the file even if temporary repairs take place or a party initially offers a limited sum.

At the end of initial advice, ask what information is still missing for the next decision: party details, technical investigation, a loss assessment or an urgent measure. Distinguish an offer of temporary repairs from a final settlement. Have the wording of any release assessed before signing; an initial practical contribution does not mean you can already foresee every future consequence.

• Safe photographs, discovery and a timeline of the work.
• Baseline survey, older reports and relevant measurements.
• Details of the client, contractors and contacts.
• The investigation question, causation report and itemised repair costs.
• Notifications, responses, safety questions and procedural deadlines.