Construction Acceptance Checklist: Complete Guide for Building Owners

What Is Construction Acceptance (Bauabnahme)?

The construction acceptance (Bauabnahme) is the formal handover of the completed building work from the contractor to the client. Under German law, it is one of the most consequential moments in a construction project because it triggers several legal effects:

• Burden of proof shifts – Before acceptance, the contractor must prove their work is defect-free. After acceptance, the building owner must prove any defects.
• Warranty period begins – The 5-year warranty period (BGB §634a) starts on the date of acceptance.
• Final payment becomes due – The contractor can invoice the remaining balance.
• Risk transfer – The risk of accidental damage or destruction passes to the building owner.

Because of these consequences, never rush the acceptance inspection.

Before the Inspection: Preparation

• [ ] Review the construction contract and specifications
• [ ] Collect all documentation: construction diary, change orders, material certificates
• [ ] Bring the approved building plans for comparison
• [ ] Hire an independent building expert (Bausachverständiger) if possible
• [ ] Ensure the building is accessible and all areas can be inspected
• [ ] Bring a camera, measuring tape, flashlight, and a notepad

The Acceptance Checklist

Exterior

• [ ] Facade finish and paint – no cracks, stains, or uneven areas
• [ ] Roof – tiles properly laid, gutters and downpipes installed
• [ ] Windows and doors – open and close smoothly, seals intact
• [ ] Drainage – proper grading away from building, drainage functional
• [ ] Balconies and terraces – waterproofing, railing height (min. 90 cm)

Interior – General

• [ ] Walls and ceilings – no cracks, proper finish, correct paint color
• [ ] Floors – level, no hollow spots (tap test), correct material installed
• [ ] Doors – open/close properly, locks function, no scratches
• [ ] Windows – seals intact, no condensation between panes, hardware works

Technical Systems

• [ ] Electrical – all outlets and switches work, circuit breakers labeled
• [ ] Plumbing – hot/cold water in all taps, no leaks, proper drainage
• [ ] Heating – radiators heat up evenly, thermostat valves function
• [ ] Ventilation – fans operational, air flow adequate in bathrooms and kitchen

Wet Rooms

• [ ] Waterproofing – properly executed (request documentation/photos)
• [ ] Tiles – no hollow tiles (tap test), grout lines complete
• [ ] Drains – water flows away properly, no pooling
• [ ] Silicone joints – complete and properly applied

Basement and Attic

• [ ] Basement waterproofing – no moisture or water marks
• [ ] Insulation – properly installed, no gaps or thermal bridges
• [ ] Fire safety doors – self-closing mechanism works

Common Defects to Watch For

The most frequently found defects during acceptance inspections include:

1. Uneven floors – Use a straightedge; tolerances per DIN 18202
2. Hollow tiles – Tap with a hard object; hollow sound indicates poor adhesion
3. Window seal gaps – Check all corners and joints
4. Missing insulation – Visible gaps at pipes, ducts, or wall penetrations
5. Drainage issues – Water pooling on flat roofs or terraces
6. Electrical defects – Missing outlet covers, non-functional switches

How to Handle Defects

If you discover defects during the inspection:

1. Document everything – Photos, written descriptions, exact location
2. List all defects in the acceptance protocol – Be specific (e.g., "crack in living room wall, south side, approx. 40 cm long at 1.5 m height")
3. Accept with reservations – You can accept the work while reserving the right to have specific defects remedied
4. Set a deadline – Give the contractor a reasonable deadline for remediation (typically 2–4 weeks)
5. Do not refuse acceptance for minor defects – Unjustified refusal can trigger "deemed acceptance" (fiktive Abnahme)

Documentation Is Everything

Your construction diary is your most valuable asset during the acceptance process. It provides:

• Chronological evidence of how work was performed
• Photos of intermediate stages (e.g., waterproofing before tiling)
• Records of verbal agreements and change orders
• Weather data that may explain material issues

With docubau, all of this documentation is already organized and available as professional PDF reports – ready to reference during the acceptance inspection.

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