What Is Building Handover?
Building handover is the formal transfer of a completed building from the construction team to the owner/operator. It is one of the most critical moments in a building lifecycle because it determines the quality of information, documentation, and systems that the FM team will work with for decades. A poor handover creates operational problems that persist for the entire building life.
Key Milestones
| Milestone | Definition | Significance |
|---|---|---|
| Practical Completion (PC) | Building is substantially complete and fit for intended use, despite minor outstanding items | Triggers: DLP start, retention release (50%), insurance transfer, possession |
| Defects Liability Period (DLP) | Typically 12 months after PC. Contractor must return to fix defects at no cost. | Critical window. Defects not reported during DLP may become owner responsibility. |
| Final Completion | All defects rectified, final account agreed, remaining retention released | Formal end of contractor obligations (except latent defects) |
| Warranty Period | Equipment warranties (1-5 years), structural warranties (10+ years) | Warranty claims are time-limited and condition-dependent |
Handover Documentation Checklist
| Document | Status at Handover | Common Problem |
|---|---|---|
| As-built drawings (all disciplines) | Required at PC | Not updated from design drawings |
| O&M manuals | Required at PC | Generic manufacturer brochures only |
| Commissioning reports | Required at PC | Incomplete or missing entirely |
| Test certificates (electrical, fire, structural) | Required at PC | Tests not completed or certificates missing |
| Equipment schedules and asset data | Required at PC | Not compiled into usable format |
| Warranty certificates | Required at PC | Scattered across subcontractors |
| Training records (for operational staff) | Required at PC | No training delivered or not documented |
| Spare parts and special tools | Required at PC | Not provided or not labelled |
| Health and safety file | Required at PC | Not compiled |
| Building management system programming | Required at PC | No documentation of setpoints, schedules, or logic |
Snagging
Snagging is the process of identifying and recording defects before and after practical completion. Best practice:
- Pre-PC snag: Walk every space 2-4 weeks before target PC date. Record every defect with photo and location.
- Post-PC snag: Systematic walk-through at 1, 3, 6, and 11 months after PC (before DLP expires).
- Categories: Safety-critical (immediate), functional (within 30 days), cosmetic (before DLP end).
- Tracking: Spreadsheet or snagging app with photo, location, category, responsibility, and status.
- Final DLP snag: Complete walk-through at month 11. Everything not reported before DLP expires may become your cost.
What Usually Goes Wrong
- Pressure to accept PC too early — commercial pressure to start lease or occupation forces premature acceptance.
- FM team not involved — FM team joins after handover, inherits problems they had no opportunity to prevent.
- BMS not commissioned properly — system installed but not tuned. Setpoints, schedules, and alarms not configured for actual use.
- Training not delivered — operators receive no training on building-specific systems.
- DLP snags not tracked — defects identified but contractor never returns to fix them. DLP expires.
- No seasonal commissioning — building handed over in winter; cooling system never tested until first summer.
FM Team Involvement Checklist
To prevent handover failures, the FM team should be involved from design stage:
- Review designs for maintainability (access to plant, space for maintenance activities)
- Specify O&M manual requirements in the construction contract
- Attend commissioning to understand system operation
- Participate in all snagging walks
- Receive hands-on training on every major system
- Verify BMS programming against operational requirements
- Request seasonal commissioning (both heating and cooling seasons)
References
Insights & Guidance
- Practical Completion triggers the Defects Liability Period (typically 12 months). Defects not reported before DLP expires become the owner cost.
- Handover documentation: as-built drawings, O&M manuals, commissioning reports, test certificates, equipment schedules, warranties, BMS programming docs.
- FM team must be involved from design stage, not join after handover. Most handover failures occur because FM had no input.
- Final DLP snag at month 11 is critical. Everything not reported before DLP expires may never be fixed at contractor cost.
- Seasonal commissioning is essential. A building handed over in winter has never been tested in cooling mode.
A poor handover creates operational problems that persist for decades. Missing documents, untrained operators, uncommissioned systems, and untracked defects compound into higher costs, lower performance, and safety risks throughout the building lifecycle.
- Premature PC acceptance — incomplete building accepted under commercial pressure.
- DLP expires without final snag — defects become owner cost permanently.
- No training — operators guess how to run building systems.
- Practical Completion certificate
- Snagging list with status tracking
- As-built drawings and O&M manual
- Commissioning reports for all systems
- Are as-built drawings available and up to date?
- Can the FM team operate the BMS confidently?
- Are there outstanding snagging items from handover?
- When was practical completion certified?
- Were all handover documents received?
- Are there outstanding defects from the DLP?
- Pre-PC inspection — independent building surveyor.
- Commissioning witness — independent commissioning agent.
- Contract review — construction lawyer for PC/DLP disputes.