Construction
Handover documentation and warranties
What has to be handed over at the end, and why it is gathered during rather than after.
Completion is the moment when everything generated over two years is demanded at once: installation certificates, material warranties, as-built drawings, test records, manuals. And whoever gathers it at the end discovers half of it belonged to a company that got paid and left.
Why it always jams the same way
| Document | Who holds it | When it vanishes |
|---|---|---|
| Installation certificates | The installer | When their part finishes, months earlier |
| Material warranties | The supplier or buyer | When that person moves project |
| As-built drawings | The engineers or site manager | When they move site |
| Test records | Whoever ran them, sometimes only on paper | When the site office is dismantled |
Important
All four share something: **they exist while the work is fresh and evaporate when that trade leaves site.** Asking for them at the end means asking the worst person at the worst moment.
The rule that fixes it
Each trade hands over its documentation **when its part finishes, not when the project finishes**. And their final payment application closes with it delivered. It is the only lever that truly works, and it requires chasing nobody.
- 1
Define the list per trade at contracting
In the contract or order itself, not in a last-minute email.
- 2
Open their folder from day one
So that handing over means uploading, not preparing a package.
- 3
Tie financial closure to delivery
It is what turns a request into a priority.
- 4
And review as each trade finishes, not at the end
A wrong certificate is fixed in a week while they are still there; in a year, it is not.
Watch out
Beware accepting "I'll email it to you". What arrives by email to one person disappears with their inbox: if they move site or company, the completion documentation stayed in a mailbox nobody opens.
What the client takes away
That last point serves you too: a handover the client can navigate alone generates far fewer calls over the following two years.
Worth knowing
Warranties are documents with expiry dates like any other. Handed over with their dates, whoever receives the building can see what is still covered without opening every PDF.
›What if a trade no longer exists?
Hence collecting as their part ends. After that you can only reconstruct what is available.
›Does it apply to small refurbishments?
Yes, and it is easier: fewer trades and less turnover.
›Who keeps it afterwards?
The client, and you should keep a copy for your liability period.
A real case
The situation
A developer gathers handover documentation three months after completion.
What you do
- Switches to collecting per trade as each part closes
- Ties the final payment application to document delivery
What you get
The next development hands over the complete set on the day of completion.
The situation
Close-out gathers months-old material at the end.
What you do
- Requests as each trade finishes
What you get
Close-out becomes a formality.
The situation
A trade has been paid and does not respond.
What you do
- Chases before certifying their work
What you get
You chase while there is still leverage.
The situation
The list of what is missing appears at the end.
What you do
- Shows what is missing from day one
What you get
The gap is visible while it can be closed.
The situation
Handover happens with a gap and no record of chasing.
What you do
- Keeps what was requested, from whom and how many times
What you get
The trail is the defence.
The situation
Under warranty, close-out documentation is requested.
What you do
- Keeps the file beyond handover
What you get
You answer with the record from then.
This article answers
- site handover documentation
- what the building manual contains
- installation warranties at completion
- as-built drawings and final certificates