The handover of a completed renovation project is a formal process — or should be. The moment of practical completion, when the contractor hands over the building and the client takes possession, marks the beginning of the defects liability period and the point at which the client assumes responsibility for maintaining the property. A well-managed handover ensures that all outstanding works are identified and recorded, that the client understands the systems they have inherited, and that the documentation needed for future maintenance and management is delivered in a usable form. A poorly managed handover — one that is rushed, undocumented, or conducted without adequate preparation — leads to months of dispute about what was and was not complete, and systems that are never used correctly because the client was never shown how.
Practical Completion: What It Means
Practical completion (PC) is the point at which the architect (or contract administrator) certifies that the works have been completed in accordance with the contract — not that every last detail is perfect, but that the building is ready for occupation and use. Under a JCT contract, practical completion triggers several important contractual events:
- —The defects liability period begins (typically 12 months for residential work)
- —The contractor's obligation to insure the works transfers to the client (the client must arrange buildings insurance from the date of PC)
- —Half of the retention held by the client is released to the contractor
- —The client takes possession of the property
The architect should only certify practical completion when the works are genuinely complete to a standard that allows occupation — not as a favour to a contractor who is behind programme, and not before outstanding works are formally recorded. Practical completion certified prematurely (before the building is genuinely ready) undermines the client's position if significant defects emerge during the defects liability period.
The Snagging Process
Snagging is the systematic identification and recording of defects, outstanding works, and items that do not meet the specified standard. A thorough snag list, prepared before practical completion is certified, is the primary tool for ensuring that the contractor addresses all outstanding items under the contract rather than treating completion as the end of their obligations.
Who prepares the snag list: The architect prepares the formal snag list as part of their contract administration role; in some projects, the client also prepares their own list. A specialist snagging company (increasingly used for prime residential projects) can provide an independent, thorough inspection. For a major renovation, all three approaches are complementary — the architect's list, the client's list, and a specialist's list together provide comprehensive coverage.
What to snag: Snagging covers every trade and every room. The snag list should address: - Joinery: door alignment (do all doors open and close without binding or rattling?), drawer operation, cabinet door gaps, paint finish quality, ironmongery alignment - Plastering: cracks, hollow spots, roughness, paint finish consistency - Tiling: lippage between tiles, cracked or damaged tiles, grout consistency, movement joints - Flooring: gaps between boards, squeaks, surface damage, transitions between floor types - Services: do all switches, sockets, and luminaires operate correctly? Are thermostats set correctly? Are taps and showers operational? - External: pointing, render, paintwork, drainage outlets clear, windows and doors operating correctly
Format: The snag list should identify each item by room and location, describe the defect, and indicate the required remediation. A numbered list with photographs is the most useful format — it allows each item to be tracked to completion and prevents disputes about whether an item has been addressed.
Defects Liability Period
The defects liability period (DLP) — typically 12 months from practical completion — is the period during which the contractor is obliged to return to site and make good any defects that appear. The contractor is not responsible for fair wear and tear or for items that the client has damaged after taking possession, but they are responsible for:
- —Latent defects (defects that were present at completion but not visible — for example, a leaking pipe joint concealed behind plasterwork)
- —Items on the snag list that have not yet been fully rectified
- —Defects in workmanship that manifest during normal use
The client should maintain a defects log during the DLP, recording each defect as it is identified with the date and a description. At or before the end of the DLP, the architect carries out a final inspection, prepares a schedule of outstanding defects, and issues a notice to the contractor requiring rectification. Once all defects are made good, the architect issues the making good of defects certificate, which triggers release of the remaining retention.
Operations and Maintenance Documentation
The O&M (operations and maintenance) manual is the document that enables the client to understand, operate, and maintain the building they have taken possession of. For a prime London renovation with complex mechanical and electrical systems, smart home integration, and specialist finishes, the O&M manual is a substantial and genuinely important document.
Mechanical and electrical systems: The M&E O&M manual should include: - System schematics (heating, hot water, ventilation, electrical distribution) - Manufacturer's data sheets and installation manuals for every piece of equipment - Commissioning records (boiler settings, UFH flow rates, fan speeds, dimmer pre-set levels) - Maintenance schedule (what needs to be serviced, how frequently, and by whom) - Emergency procedures (how to isolate water, gas, and electricity; who to call)
Smart home and AV systems: The home automation and AV O&M should include the system architecture, programming documentation, user guide for the control interfaces, and contact details for the integrator. A brief training session with the integrator at handover — walking the client through the control interfaces and scene presets — is far more effective than a printed manual alone.
Specialist finishes: Maintenance instructions for all specialist finishes (natural stone sealing and cleaning, timber floor oiling, lime plaster care, fabric wallcovering maintenance, bespoke joinery care) should be compiled in a finishes maintenance guide. Most manufacturers provide this information; it should be collated and presented clearly rather than left to the client to assemble from product data sheets.
Building fabric: Structural drawings, party wall awards (with schedule of condition), building regulations completion certificates, electrical installation certificate (EIC), gas safety certificate, drainage CCTV survey results, and any specialist warranties (flat roof guarantee, waterproofing guarantee, damp-proofing guarantee) should all be included.
Warranties and Guarantees
A comprehensive warranties file should be prepared at handover, collecting:
- —Contractor's defects liability obligations under the building contract
- —Product warranties (boiler, heat pump, kitchen appliances, windows)
- —System guarantees (flat roof, waterproofing, damp-proofing, fire alarm)
- —NHBC or equivalent structural warranty (if applicable for new structural elements)
- —Electrical installation certificate (10-year in some interpretations, though periodic inspection is still recommended every 5–10 years)
Each warranty should record its duration, what it covers, what invalidates it (for example, many appliance warranties are invalidated by failure to carry out annual servicing), and who to contact in the event of a claim.
Financial Closeout
Alongside the physical handover, the financial closeout of the project should be progressed:
- —Agreement of the final account with the contractor
- —Release of the first half of retention at practical completion
- —Settlement of any outstanding professional fees
- —Final reconciliation of the client's budget against actual costs
The final account is often not agreed on the date of practical completion — the contractor may have outstanding variation claims and the QS may have outstanding queries. A target date for final account agreement (typically 3–6 months after practical completion) should be established and actively managed. An unresolved final account that drifts for more than 12 months becomes a significantly more contested and expensive exercise to conclude.
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