Handover Pack for Construction Projects UK — What to Include and Why It Protects You (2026)

What is a handover pack?

A handover pack is the collection of documents and information you give to the client at practical completion. It formally records what was built, how it was built, what equipment was installed, and what the client needs to know to look after and maintain the building going forward.

Think of it as the transfer document for the building. Before you hand it over, you are responsible for the works. After you hand it over — with a signed acknowledgement and a dated document list — responsibility passes to the client. That transition is only clean if it's documented properly. Without it, you're relying on goodwill and memory to resolve disputes that may arise six or twelve months later.

The handover pack is also the evidence that the work was completed properly and that the client was informed of their obligations. If a client calls you back six months after completion claiming something was never working, your handover pack — signed by them at completion — is your first line of defence. If a dispute goes to adjudication or court, a well-assembled handover pack demonstrates professionalism and shifts the burden of proof in your direction.

Why a thorough handover protects you

Post-completion disputes are one of the most common sources of unpaid invoices and legal headaches in the construction industry. A client who regrets the cost of the job, who has had a falling-out with you during the works, or who simply doesn't understand what they agreed to will find it easier to dispute a vague handover than a detailed, signed one.

A signed handover record with a dated document list does several things at once. It confirms the date of practical completion — which starts the clock on the defects liability period and, under most formal contracts, triggers the first release of retention. It records exactly what documents were handed over, so a client cannot later claim they were never given the Gas Safe certificate or the building regulations completion certificate. And it captures the condition of the works at handover, so any damage caused by the client after that point is demonstrably their responsibility.

On domestic projects where no formal contract exists, the handover pack also helps you demonstrate that the work was carried out with reasonable care and skill — the standard the Consumer Rights Act 2015 requires. Without documentation, any dispute becomes a case of your word against the client's.

Practical completion certificate

The practical completion certificate (PCC) is the foundational document in any construction handover. It should be issued when the works are practically complete — meaning the building is usable and habitable for its intended purpose. Minor snagging items may still exist at this point; practical completion does not mean perfect completion.

Under formal contracts such as JCT, the contract administrator or architect issues the certificate. On domestic projects without a contract administrator, you and the client both sign it. Either way, the certificate should be dated and signed by both parties, and it should clearly state the practical completion date.

The practical completion certificate does three important things:

• It starts the defects liability period — the contractual window during which the client can notify defects and require you to return and fix them.
• It releases the first portion of retention — typically half of the withheld amount under a standard JCT contract.
• It transfers insurance responsibility for the building from the contractor to the client (under most standard contract terms).

Never let practical completion drift without a signed certificate. Some clients delay signing in the hope of retaining leverage over the final account. If the works are genuinely practically complete, issue the certificate and request a signature. Document any pushback in writing.

Building regulations completion certificate

This is the certificate issued by the local authority building control (LABC) or an approved inspector confirming that the works comply with the Building Regulations 2010 (as amended). It applies to any project that required building regulations approval — extensions, new builds, structural alterations, changes to drainage, electrical rewires, boiler replacements, and much more.

The building regulations completion certificate is not optional. Without it, the building cannot legally be sold or mortgaged. Conveyancing solicitors will ask for it as a matter of course, and its absence can collapse a property sale years after the works were carried out — with the blame (and the cost of regularisation) frequently landing on whoever did the work.

As the contractor, you are responsible for applying for final sign-off and obtaining this certificate before handover. Do not hand over the building without it unless there is a very specific and documented reason why it has not yet been issued (for example, because the LABC inspection is booked but has not yet taken place). If that's the case, make clear in writing that practical completion is conditional on the certificate being issued and included in the handover pack within an agreed number of days.

Include the original completion certificate — or a certified copy — in the handover pack, and note the project reference, inspector's name, and date of sign-off.

Installation manuals and O&M documentation

Operation and Maintenance (O&M) manuals cover every piece of installed equipment that the client will need to operate and maintain. On a residential extension or new build, this might include:

• Boiler or heat pump — manufacturer's installation and user manual, commissioning report, and recommended annual service schedule
• Mechanical ventilation or MVHR system — filter replacement schedule, settings, and fault codes
• Underfloor heating — zone controls, thermostat instructions, and minimum screed drying times if applicable
• Electrical consumer unit — circuit schedule, RCD test instructions, and reset procedure
• Security system or smart home equipment — user guide, codes, and installer contact details
• Solar panels or battery storage — inverter manual, generation meter instructions, and maintenance requirements

For each piece of equipment, include the manufacturer's warranty document (separate from your workmanship guarantee), the product data sheet if relevant, and details of the manufacturer's helpline. A client who knows how to operate their heat pump and when to service it is far less likely to call you with a "fault" that is actually a user error.

On larger commercial projects, O&M manuals become a formal deliverable under the contract — often a structured document running to hundreds of pages, submitted in a specific format and approved by the contract administrator. On domestic work, a well-organised folder with each item's manual, warranty, and service schedule achieves the same protective purpose without the overhead.

As-built drawings

As-built drawings record where things actually are once the works are complete — as opposed to where they were planned to be. Services such as drainage runs, electrical cable routes, gas pipework, water supply lines, and data cables all need to be locatable by anyone doing future maintenance or alteration works on the building. On a new build, this is essential. On an extension, it is nearly as important.

For most domestic projects, as-built drawings do not need to be architect-quality CAD drawings. A clearly annotated floor plan showing where the main drainage run goes, where the electricity supply enters the building, where underfloor heating loops are positioned, and where any buried cables run is sufficient. You can produce this yourself using the original plans as a base and marking up the deviations and service routes with a pen, then photographing or scanning it.

This matters beyond just future maintenance. The Building Safety Act 2022 introduced a "golden thread" of information for higher-risk buildings (currently defined as multi-occupancy residential buildings of 18 metres or above, or seven or more storeys). The golden thread requires as-built information to be maintained and updated throughout the life of the building. Even for buildings that don't fall under the higher-risk regime, the principle is sound practice: accurate records of what is built and where protect both the client and the contractor.

If there were significant departures from the design drawings during construction — a drainage run repositioned to avoid an obstruction, for example — those changes should be captured in the as-built drawings and, where relevant, confirmed as compliant with building regulations.

Guarantees and warranties

A handover pack should bring together all the guarantees and warranties relevant to the project in one place. These fall into three categories.

Your workmanship guarantee. This is your own guarantee of the quality of the labour — distinct from any product warranties. It should be in writing, specify the duration (typically 1–10 years depending on your business), clearly state what is covered (workmanship failures, not fair wear and tear or client misuse), identify who to contact if a claim arises, and give a response time commitment. Without a written workmanship guarantee, you have no control over what a client believes you are liable for. A clear, written document sets expectations on both sides.

Product warranties. Manufacturers provide warranties for materials and components — roofing felt, insulation systems, windows and doors, boilers, underfloor heating, render systems. These warranties are often conditional on the product being installed by a certified or approved installer and in accordance with the manufacturer's instructions. Collect the original warranty documents and include them in the handover pack. If a warranty has a registration requirement (many do), complete the registration before handover and confirm it in the pack.

Structural warranty. On new builds and some major conversions, the client (and their mortgage lender) will require a structural warranty — the most common being NHBC Buildmark. This covers structural defects for ten years from practical completion. If you are providing a structural warranty, confirm that the policy is in place, issued in the client's name, and included in the handover pack. If a structural engineer signed off on any element of the design or construction, include their sign-off letter as well.

Gas Safe and electrical certificates

Statutory certificates are the non-negotiable element of any handover pack where relevant work has been carried out. These must be originals or certified copies — not photocopies or screenshots.

• Gas Safe commissioning certificate. Required for any gas work — boiler installation, gas hob, gas fire, or any new gas pipework. Must be issued by a Gas Safe registered engineer. Without it, the installation is not legally commissioned and the boiler warranty is typically void.
• Electrical Installation Certificate (EIC). Required for any new electrical installation — a new circuit, a consumer unit replacement, or a full rewire. Issued by a Part P competent person or by a local authority building control inspector. For minor additions to existing circuits, a Minor Works Certificate is appropriate instead.
• FGAS certificate. Required for any system involving refrigerants — heat pumps, air conditioning units, VRF systems. The F-Gas Regulations 2015 require that anyone handling refrigerants is certified, and a commissioning record must be kept. Include the commissioning certificate and the engineer's F-Gas qualification reference in the handover pack.
• Electrical Installation Condition Report (EICR). Not always required at handover, but relevant if you are carrying out works on an existing electrical installation in a rental property, or if a full survey of the existing installation was carried out as part of the project scope.

Missing statutory certificates are one of the most common reasons handovers go wrong. A client who later discovers their boiler has no Gas Safe certificate — or that the new electrical circuits were not properly certified — has a legitimate basis for a claim. Check these are in order before the handover meeting, not on the day.

Defects liability period terms

The handover pack is the right place to set out the defects liability period terms in plain language — not buried in a contract appendix, but as a clear, readable document the client can refer to. This prevents misunderstandings later and protects you if a client makes a claim that falls outside the scope of your liability.

Include the following in your defects liability period summary:

• Duration. State clearly when the defects liability period starts (the date of practical completion on the certificate you are both signing today) and when it ends (typically six or twelve months later). Name the date explicitly.
• What qualifies as a defect. A defect is a failure of workmanship or materials to meet the agreed specification or building regulations standards. It does not include fair wear and tear, damage caused by the client or third parties after handover, or work outside the original scope that the client is requesting as an addition.
• How to notify a defect. Give the client a clear method — email to a named address, for example — so that defect notifications are in writing. Avoid verbal-only notification routes that create dispute over what was reported and when.
• Your response time commitment. For genuine defects, commit to a reasonable response time — typically acknowledgement within two working days and attendance within a stated period. Emergency defects (a leak, a heating failure in winter) should have a faster-track commitment.

Setting out these terms in the handover pack gives the client a clear framework for how the post-completion period works. It also demonstrates that you are a professional operation — not a contractor who disappears the day the final invoice is paid.

How to present the handover pack

The format matters almost as much as the content. A disorganised bundle of loose papers shoved into a carrier bag does not convey professionalism and will not be valued by the client. A well-organised, clearly labelled folder — physical or digital — demonstrates that you take the handover seriously.

Use a tabbed folder or binder with labelled sections, or a well-structured PDF or digital folder if you are providing it digitally (many clients now prefer digital). At the front, include a document index — a list of every item in the pack with a brief description. This is the sheet you both sign at the handover meeting. It confirms what was provided, when, and to whom.

Walk the client through the handover pack at the handover meeting. Do not just hand it over and leave. Go through each section briefly — this is your practical completion certificate, this is the building regulations certificate, this is the boiler manual and Gas Safe certificate, here is how the defects liability period works. Clients who understand what they have been given are less likely to dispute it later. They are also more likely to follow the maintenance requirements in the O&M documentation, which reduces the chance of defect claims arising from incorrect use.

Keep a copy of everything. Your copy of the signed handover record, the document index, and all certificates should be filed and retained for at least the duration of any relevant warranty period — and ideally for six years, matching the general limitation period for contract claims under English law.

Handover pack checklist

• Signed practical completion certificate with the completion date stated
• Building regulations completion certificate (LABC or approved inspector)
• As-built drawings or annotated floor plans showing service routes
• O&M manuals for all installed equipment
• Manufacturer's warranties for materials and products (with registration confirmation where required)
• Your written workmanship guarantee (duration, scope, contact details, response time)
• Structural warranty documentation (NHBC Buildmark or equivalent) if applicable
• Gas Safe commissioning certificate (if gas work was carried out)
• Electrical Installation Certificate or Minor Works Certificate (if electrical work was carried out)
• FGAS commissioning certificate (if refrigerant systems were installed)
• Defects liability period summary — dates, scope, notification method, response commitment
• Signed document index confirming receipt of all items in the pack