What Building Handover Means
Building handover is the formal process of transferring a completed building (or fit-out) from the contractor/developer to the owner/occupier. It is the point where construction responsibility ends and operational responsibility begins. A poorly managed handover creates years of problems — missing documentation, latent defects, untrained operators, and disputed responsibilities.
Handover Stages
1. Practical Completion
The building is substantially complete and fit for occupation, even if minor defects remain. This triggers:
- Start of the Defects Liability Period (DLP) — typically 12 months
- Release of retention (typically 50% of retention held)
- Transfer of insurance responsibility to the owner
- Handover of keys and access control
2. Snagging / Defect Inspection
Systematic inspection to identify defects and incomplete works. Categories:
| Category | Example | Action |
|---|---|---|
| Category A — Safety | Missing fire stopping, exposed wiring, non-functional exit | Rectify before occupation |
| Category B — Functional | Leaking pipe, HVAC not cooling, lift levelling issue | Rectify within 14 days |
| Category C — Cosmetic | Paint touch-up, scratched glass, damaged tile | Rectify within 30 days |
3. Documentation Handover
The following must be received and verified at handover:
- As-built drawings — all disciplines (architectural, structural, MEP, fire) reflecting what was actually built
- O&M manuals — manufacturer documentation for every installed equipment item
- Test certificates — electrical, fire alarm, sprinkler, HVAC commissioning, lift, waterproofing
- Warranties — itemised list with start dates, durations, terms, and contact details
- Spare parts and keys — all special keys, access cards, spare filters, spare sprinkler heads, touch-up paint
- Health and safety file — hazardous materials register, structural loading limitations, access procedures
4. Training
The contractor must train the building operations team on all installed systems:
- BMS operation and alarm management
- Fire alarm panel operation, zone identification, silence/reset procedure
- Generator operation — start, transfer, refuel, fault clearing
- HVAC plant operation — chiller start/stop, AHU control, filter access
- Lift emergency procedures — entrapment release, fireman's switch
Defects Liability Period (DLP)
- Duration: Typically 12 months from practical completion. May extend to 24 months for major systems.
- Scope: Contractor must rectify any defect that appears during the DLP at no cost, provided it's not caused by occupant misuse or wear.
- Process: Log defects as they appear → notify contractor in writing → contractor rectifies within agreed timeline → verify rectification.
- End of DLP: Final inspection → issue final snag list → contractor rectifies → release remaining retention (typically remaining 50%).
Common Handover Failures in Bangladesh
- No as-built drawings provided (or design drawings passed off as as-builts)
- O&M manuals missing or incomplete
- No commissioning reports — systems handed over without proper testing
- Training not conducted — operations team doesn't know how to operate systems
- Fire protection systems not tested or certified
- Snagging list not tracked — defects remain unresolved for years
References & Sources
- BSRIA BG 6 — Soft Landings
- RICS — Building Surveys and Handover Practice
- ASHRAE Guideline 0 — Commissioning Process
- FIDIC Conditions of Contract — Defects Notification Period
- BNBC 2020 — Construction Completion Requirements (HBRI, Government of Bangladesh)
Insights & Guidance
- Handover is where construction responsibility ends and operational responsibility begins — get it right.
- Snagging must be categorised: safety defects before occupation, functional within 14 days, cosmetic within 30 days.
- Critical handover documents: as-built drawings, O&M manuals, test certificates, warranties, health and safety file.
- Defects Liability Period (typically 12 months) is your window to have defects fixed at contractor cost.
- Training of operations team on all systems is a contractual requirement, not a favour.
- In Bangladesh, handover documentation is commonly incomplete — insist on it as a condition of practical completion certificate.
A building without proper handover documentation is a building without a maintenance baseline. Without as-built drawings, you don't know what's behind the walls. Without commissioning reports, you don't know if systems were ever properly tested. Without O&M manuals, you can't maintain equipment correctly. Every gap at handover becomes a recurring operational problem.
- Missing as-builts — maintenance team doesn't know pipe routes, duct locations, or structural details behind finishes.
- Latent defects — waterproofing fails after DLP expires; no recourse to contractor.
- Untrained operators — staff don't know how to operate BMS, fire panel, generator; systems are mismanaged or bypassed.
- Warranty claims lost — no warranty documentation means equipment failures can't be claimed.
- Snag list abandoned — defects never rectified; become permanent maintenance burden.
- Practical completion certificate (signed by architect/engineer and contractor)
- Snagging list with status tracking (open/closed/verified)
- As-built drawings — all disciplines
- O&M manuals — all equipment
- Test and commissioning certificates
- Warranty register with expiry dates
- Training records — who was trained, on what, by whom
- Spare parts inventory
- Finishes quality — paint, flooring, joinery, ceiling alignment.
- Door and window operation — smooth opening, proper sealing, hardware functional.
- MEP systems — all running, no leaks, no unusual noise, proper labelling.
- Fire systems — alarm panel showing normal, sprinkler heads clear, exit signs lit.
- Washrooms — all fixtures working, no leaks, adequate water pressure.
- External — landscaping complete, drainage clear, access roads finished.
- Has practical completion been formally certified? By whom?
- Where is the snagging list? How many items remain open?
- Have as-built drawings been provided for all disciplines?
- Are O&M manuals complete for all installed equipment?
- Have all systems been commissioned and tested? Can I see the reports?
- What training has been provided to the operations team? Is it documented?
- What is the DLP duration and what does it cover?
- What spare parts and special tools have been handed over?
- Handover inspection — independent building surveyor for snagging.
- Commissioning verification — MEP commissioning specialist to witness/verify system tests.
- Document review — technical reviewer to verify as-builts match installed work.
- DLP management — FM consultant to track defects and enforce contractor obligations.