Assemble the agreed work and supporting evidence
Bring the accepted scope, product schedule, drawings, recorded changes, test documents, invoices and payment list together. Arrange access to the completed work and the people needed to explain it. Compare the actual result with the current agreement, not an old quote or a general expectation of what a renovation should include.
Use an appropriately qualified independent specialist when concealed systems, workmanship or technical performance cannot reasonably be assessed by you. Agree the specialist’s service and fee separately. An inspection can record observations and assess agreed aspects; it cannot certify unknown hidden work without the necessary evidence or investigations.
Understand what acceptance does and does not mean
BGB section 640 requires acceptance of contractually completed work and does not allow refusal solely for insignificant defects. It also addresses deemed acceptance after a properly set deadline, with an additional text-form warning requirement for consumers. Do not assume that avoiding a signed protocol prevents every legal form of acceptance, or that any small blemish justifies indefinite refusal.
Known defects need an explicit reservation of the relevant rights at acceptance under the statute. Record the actual decision and obtain legal advice where consequences are uncertain. A technical inspection, occupation and a formal legal declaration are related events but not interchangeable labels. An in-app completed status does not itself settle your contract’s acceptance question.
Record useful defects rather than vague dissatisfaction
| Record | Useful detail |
|---|---|
| Location and item | Room, opening or product reference |
| Observed deviation | What differs from the agreed specification |
| Evidence | Dated photograph, measurement or test reference |
| Responsibility and next action | Who checks or corrects which point |
| Timing and access | Suitable correction period and arrangements |
| Decision and reservation | Actual acceptance position and expressly preserved rights |
Check operation and agreed finishes, accessible connections, product identity and the specified commissioning records. Keep photographs of concealed work and any missing records as distinct issues. “Bad finish everywhere” is less useful than a room reference and an identifiable deviation. A repair invoice is not proof that a defect was corrected; arrange and record the necessary recheck.
Reconcile the final account to the contract
Compare quantities, unit prices or agreed lump sums, accepted additions, omitted work, VAT and previous transfers. Ask for supporting measurement or time records where relevant. The consumer invoice guidance recommends an understandable account that can be compared with the offer. A construction contract can also be subject to the specific final-invoice requirements in BGB section 650g; have the actual contract classification checked.
Keep disputed amounts visible and request clarification in a traceable form. Do not ignore an acceptance request or invoice because the project has become frustrating. Due payment and appropriate withholding follow the applicable rules, including BGB section 641; a disagreement does not automatically erase the entire balance.
Read a conditional reconciliation example
| Item | Amount |
|---|---|
| Original gross work | 29 750 |
| Accepted additional work | 1 428 |
| Accepted omission credit | −595 |
| Reconciled work total | 30 583 |
| Previous transfers | 20 000 |
| Balance before retention | 10 583 |
| Illustrative appropriate retention | 1 200 |
| Payment now in this model | 9 383 |
| Amount remaining pending resolution | 1 200 |
Section641(3) describes an appropriate amount, generally twice the necessary correction cost. It is not an automatic minimum of double, a flat percentage of the contract or a right to retain the whole invoice regardless of the defect. Actual circumstances and entitlement need assessment. Paying EUR 9,383 leaves EUR 1,200 open; the agreed cost remains EUR 30,583 unless a proper price adjustment follows. After correction, reconcile release and previous transfers again.
Close the project with records and open issues intact
- Record the actual acceptance decision and reservations.
- Agree correction, access and proportionate next steps.
- Keep tests, product documents, care instructions and relevant approvals.
- Recheck defects and confirm what remains unresolved.
- Reconcile final account, credits, payments and any retention.
- Keep the evidence for later questions and applicable rights.
The statutory defect remedies have prerequisites; do not automatically replace the original contractor at its expense without checking the right procedure. Preserve urgent evidence and obtain advice when needed. Keep the renovation’s other purchases, professional fees and reserve in the full project account, since this trade reconciliation excludes them.
Reno Pro can keep documents, notes and recorded payments organised. It does not replace a technical inspection or legal acceptance declaration. A useful project close makes the remaining responsibilities and money clear, even when a few properly recorded matters are still open.
Sources, date and scope
- Bundesministerium der Justiz / Bundesamt für Justiz — BGB § 640 — Abnahme
- Bundesministerium der Justiz / Bundesamt für Justiz — BGB § 641 — Fälligkeit der Vergütung
- Bundesministerium der Justiz / Bundesamt für Justiz — BGB — §§ 631–632, 633–637, 649, 650b–650g
- Verbraucherzentrale — Handwerker: Auftrag, Abnahme und Rechnung
Checked on 19 October 2026. Local examples concern Berlin unless stated otherwise. Check state law, heritage protection, community rules and actual work for the specific project. Teaching figures are invented euro amounts, not market prices or offers. The article projects are independent. Tax and funding calculations apply only under the stated assumptions; competent professionals resolve project-specific technical and legal questions.