Bathroom renovation: decisions from the plan to handover
Published on 31 July 2026 · Verified on 18 September 2026 · The Mestravaux.lu team
A useful schedule identifies decisions, work and approvals needed for the next stage. Duration depends on scope, supplies and conditions discovered during removal. Have companies confirm dates after inspection, including how long sanitary facilities will be unavailable.
The essentials in 30 seconds
- Approve layout and connections before ordering.
- Identify relevant permissions and prior agreements.
- Plan checks before work becomes concealed.
- Arrange washing facilities during the interruption.

Survey the existing room and agree use
Record dimensions, pipes, drainage, ventilation and access. Report leaks, damp or usability problems. Show finished levels, open doors and maintenance access on the plan. Identify what remains unknown until removal and confirm shower or toilet feasibility before buying.
| Étape | Durée | Part du budget |
|---|---|---|
| Diagnostic & plan | 1 – 2 semaines | Souvent inclus dans le devis |
| Démolition & gros œuvre | 2 – 4 jours | 10 – 15 % |
| Plomberie, électricité, étanchéité | 4 – 7 jours | 30 – 35 % |
| Carrelage & pose des sanitaires | 5 – 10 jours | 35 – 40 % |
| Finitions & réception | 1 – 2 jours | 10 – 15 % |
Répartition indicative pour une salle de bains de 5 à 8 m² en gamme milieu. Les délais de commande du carrelage et du meuble courent en parallèle du chantier, pas après.
Check consent before committing
For rented or jointly owned property, clarify consent for affected elements. Ask the municipality about procedures when the project alters the building; interior renovations do not all present the same case. For long-term care funded adaptation, wait for assessment and AEC approval before work.
Finalise the quote and deliveries
Agree scope, references, responsibilities, payment schedule and extras procedure. Check actual availability, storage and return terms. Confirm dimensions before custom manufacture. Coordinate start with trades, critical supplies and temporary sanitary arrangements.
Remove fixtures then confirm substrate condition
The company protects access and removes agreed items. Request a review of pipes, substrate, damp and differences from the initial assessment. Describe solution, cost and timing of changes before approval. Removal does not authorise unlimited additional work.
Your project deserves an accurate estimate — it's free.
Request a quoteCoordinate services and concealed work
Agree checks of connections, levels and interfaces before closing up. Shower systems need planned watertight junctions; Buildwise highlights anticipation of these details. Request photographs and product references. Exact installation order and waiting times follow the chosen system and instructions, not a universal timetable.
Finish and check operation
Confirm product waiting times before use. Test drainage, taps, flushing, opening parts and specified equipment with the company. Record visible differences, responsibility and agreed follow-up. Payment follows the contract and applicable rules; do not assume an automatic retention percentage.
Keep the handover file
Collect quotes, variations, invoices, references, instructions, photographs before concealment, care guidance and handover record. Note valve and trap access and a contact for problems. Documents should match the products actually fitted.
Frequently asked questions
How long should I allow?
Request a post-inspection schedule including procurement, work, technical waiting periods and loss of facilities.
Can I remain at home?
That depends on usable sanitary facilities, service interruptions and site conditions. Agree arrangements before removal.
When should custom furniture be ordered?
After dimensions and feasibility are approved, with confirmed delivery time and known change terms.
What should be checked before closing a wall?
Request agreed service and interface checks, photographs and references needed for maintenance.
Does an unforeseen issue automatically allow an extra charge?
Clarify the contractual procedure and request description, price and date impact before accepting changes.
Take action
Your project deserves an accurate estimate — it's free.
Request a quote